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Rfree flag transfer
by Zhang yu 06 Dec '11

06 Dec '11

Hi, I am using phenix_1.7.1-743 GUI. I would like to transfer Rfree tag from one dataset to the other one, but had the following error, "The uni cell for the Miller array /***/*** (186.326, 103.98, 297.48, 90, 98.465, 90)" is significantly different than the output unit cell (183.486, 103.5, 295.416, 90, 98.828, 90)" Two datasets are from same kind of crystal, but with slight different cells. I guess that is why "Reflection file editor" refused to do it. Could anyone tell me how to avoid the error? Thanks Yu

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autoMR wizard
by Vitali Stanevich 06 Dec '11

06 Dec '11

Hi, I'm trying to solve structure by molecular replacement. We already have structure for this protein and new is exactly the same thing with a ligand soaked. I can solve it without a problem with ccp4 gui (tfz=47.7), but not with phenix.automr, which is disappointing. Can somebody point me out what's wrong with my data input? I did it with this command: phenix.automr output.sca complex_search.pdb identity=90 mass=93500 copies=1 or with .eff file (attached) Thanks, Vitali

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H related bond deviaion
by Dialing Pretty 06 Dec '11

06 Dec '11

Dear All, I did a Phenix refine, and before the refine all the H were added. MolProbity analysis demonstrated that almost everything are acceptable after the refinement. However when I did the geometry analysis by the COOT validation, I find all the residues having a significant deviation bond involving H. with z score higher than 7. I am looking forward to getting an explanation from you on it,including how to avoid it. Cheers, Dialing

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bond deviation deected by Coot
by Dialing Pretty 05 Dec '11

05 Dec '11

Dear All, After Pheneix refine, the quality of the structure improved significantly as analyzed by Molprobity. However the bond deviation increased significantly after the refinement. Will you please tell me which refine function can be used to reduce the bond deviation detected by the Coot geometry analysis? Cheers, Dialing

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rotamer outlier reduction by coot
by Dialing Pretty 05 Dec '11

05 Dec '11

Dear All, I am leaning rotamer outlier reduction by Coot. After select a rotamer and acception, I find some hydrogens in the outlier rotamer will be isolated from the rotamer, and the rotamer will have new hydrogens at its new position. Is any influence by further refine by phenix? After new rotamer acception, I have did the rotamer auto-fit, I find there is a trend on that several oxygens can pack together. How to process this problem? After I save the new PDB file by coot after I selected the new rotamers to replace the outlier rotamers, I did a Phenix refine. There is an error message at the start says "Number of atoms with unknown nonbonded energy typensymbol: 2228". What does it mean and how to solve the problem? Is any simple method by which I can do the rotamer outlier reduction by Coot? I am looking forward to getting your reply. Dialing

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documents explaining parameter settings in phenix-1.7.2
by Ruan Wenjie 05 Dec '11

05 Dec '11

Hi, I want to know, about the new Phenix-1.7.2 version, whether I can find some detailed documents explaining how to set the parameters..since there are so many options and I'm not clear their meaning..Thanks~ best, wenjie

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Job Opportunity - Head of the Berkeley Center for Structural Biology
by Paul Adams 04 Dec '11

04 Dec '11

The Physical Biosciences Division at Lawrence Berkeley National Laboratory is seeking candidates for the Head of the Berkeley Center for Structural Biology. This position provides scientific, technical and operational oversight of the BCSB at the Advanced Light Source (ALS), a third generation synchrotron facility. The BCSB is a user resource for structural biology experiments and consists of 5 beamlines at 2 sectors of the ALS, with a staff of 16. This Staff Scientist position will provide leadership and direction to develop methodology and instrumentation for collecting and analyzing crystallographic data using synchrotron radiation, and on projects involving the structure determination of biological molecules using X-ray crystallography. This position focuses on the field of crystallography, and involves interactions and collaborations with researchers from multiple scientific disciplines including chemistry, crystallography, biochemistry, biology, physics and computational sciences. For full details please visit the job application link at: https://lbl.taleo.net/careersection/2/jobdetail.ftl?lang=en&job=73970 Lawrence Berkeley National Laboratory is a world leader in science and engineering research, with 13 Nobel Prize recipients over the past 75 years. LBNL conducts unclassified research across a wide range of scientific disciplines and hosts four national user facilities. AA/EEO employer committed to the development of a safe and diverse workforce. Learn more about the Lab at http://www.lbl.gov. -- Paul Adams Deputy Division Director, Physical Biosciences Division, Lawrence Berkeley Lab Division Deputy for Biosciences, Advanced Light Source, Lawrence Berkeley Lab Adjunct Professor, Department of Bioengineering, U.C. Berkeley Vice President for Technology, the Joint BioEnergy Institute Laboratory Research Manager, ENIGMA Science Focus Area Building 64, Room 248 Tel: 1-510-486-4225, Fax: 1-510-486-5909 http://cci.lbl.gov/paul Lawrence Berkeley Laboratory 1 Cyclotron Road BLDG 64R0121 Berkeley, CA 94720, USA. Executive Assistant: Louise Benvenue [ LBenvenue(a)lbl.gov ][ 1-510-495-2506 ] --

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pdb hierarchy
by Bradley Hintze 04 Dec '11

04 Dec '11

Hi Phenix, I have a hierarchy question. I was using the hierarchy and got something that I did not expect. when running this: pdb_io = pdb.input(pdbfile) hierarchy = pdb_io.construct_hierarchy() for model in hierarchy.models(): print model.id for chain in model.chains(): print ' ' + chain.id When I do this I expect the chains in pdbfile to be printed once for each model in pdbfile. However, when I ran this I got, for example, chain 'A' printed four times under the same model. Why is this? Thanks, Bradley

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Writing PDB
by Bradley Hintze 04 Dec '11

04 Dec '11

Hi again, I am trying to take a pdb and write out a new pdb with just a specified chain. I am trying to do this with the hierarchy but am unfamiliar with its functions How do I do this? Thanks, Bradley

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the Ming dial
by Dialing Pretty 04 Dec '11

04 Dec '11

Dear All, In the Ming dial, there is a occupancy (%), which indication of excellent , good, etc. Does it mean if I choose the "occupancy" of excellent, the rotamer outlier ratio will be lowered? My crystal has a resolution of 2.8, and I find no matter how I turn the dial, the original fits the map best. Currently my rotamer outlier is 8%, thus I need the way to have it solved. In addition, for Coot and Ming, which is much convenient to reduce rotamer outlier? I am looking forward to getting your reply. Cheers, Fenghui

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on the rotamer optimization
by Dialing Pretty 03 Dec '11

03 Dec '11

Dear All, Besides Coot and Ming, is any software or server which could further optimize the side chain outliers? I am looking forward to getting your reply. Cheers, Dialing

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solvent model in phenix.refine
by Weiergräber, Oliver H. 01 Dec '11

01 Dec '11

Hello, the ordered_solvent option in phenix.refine apparently uses these parameters by default: min_model_peak_dist = 1.8 max_model_peak_dist = 6.0 min_peak_peak_dist = 1.8 I was wondering about the justification for this (extremely relaxed) set of limits. As far as I know, the shortest hydrogen bonds (if defined as donor-acceptor distance) are about 2 A, and even these are considered exceptional and rare. Similarly, anything in excess of 3.5 A is quite unlikely to be significant energetically, so why use 6 A as an upper limit? Even if max_model_peak_dist was only meant to limit the extent of the outer solvent shell, there is no such thing as max_peak_peak_dist to avoid unreasonably long individual bonds. My personal suggestion would be a range of about 2.3 - 3.2 A for a significant hydrogen bond, with the lower limit exemplified by charged interactions (carboxyl-water or oxonium-water), which tend to be shorter - and stronger - than average. On the other hand, I do frequently observe elongated densities which, in accordance with the default parameters, are typically interpreted by phenix.refine as two water molecules about 2 A apart. So the question arises whether this is a realistic assumption, compared to a "sliding water" model in which the position of a single molecule is just ill-defined in a certain direction (due to a competition of adjacent binding sites for example)? Best regards, Oliver ================================================ PD Dr. Oliver H. Weiergräber Institute of Complex Systems ICS-6: Structural Biochemistry Tel.: +49 2461 61-2028 Fax: +49 2461 61-1448 ================================================ ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------ Forschungszentrum Juelich GmbH 52425 Juelich Sitz der Gesellschaft: Juelich Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 Vorsitzender des Aufsichtsrats: MinDirig Dr. Karl Eugen Huthmacher Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender), Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt, Prof. Dr. Sebastian M. Schmidt ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------

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Clashing alternative conformations
by Sozanne Solmaz 01 Dec '11

01 Dec '11

Dear all, I have the following problem: I have a homodimer of two protein chains A and B, which I refine in Phenix, and one residue has 2 alternate conformations (a and b) for each chain. If the residues of both chains A and B are in the alternative conformation b, they clash. However, I would expect that never both residues are in conformation b, and therefore only the combinations aa, ab and ba of alternative conformations exist. My problem is, that during the refinement, the two b conformations of the residues clash, which drives the clash-score of the overall structure to a very high value and repulsion pushes the two b-conformations apart during refinement, therefore I cannot model them properly. Is it possible in Phenix to define these two conformations as non-clashing and non-repulsive? Thank you, best regards, Sozanne Solmaz.

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"nproc" in phenix.refine
by Jonathan Elegheert 30 Nov '11

30 Nov '11

Dear all, I have a question regarding the "nproc" parameter in phenix.refine; We have the software installed on our university HPC cluster, which has nodes built up of 8 processors each. Submission works via a queuing system ("qsub"). I understand that compiling with OpenMP renders the nproc parameter disfunctional. Does this then imply that I will be limited to 1 node (8 processors) if compiled without OpenMP, since there is no "message passing" to other nodes? Or is there a way to make use of more of the available nodes, for example by compiling with OpenMP and then specifying many nodes with 1 processor? Best regards, Jonathan Elegheert PhD Student Unit for Structural Biology & Biophysics Ghent University jonathan.elegheert(a)ugent.be

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Nitric Oxide ligand keeps getting pushed far away from specified links in CIF
by Yarrow Madrona 30 Nov '11

30 Nov '11

Hello, I am having some trouble refining a structure with Nitric Oxide coordinated to the Heme Fe. I attempted to merge two Cif files. One for another ligand (CNL) and one for NO (NO.cif). I have saved the merged file as CinNO2.cif. In the defualt refinement I type the following into the command line: Mymodel.mtz mymodel.pdb CinNO2.cif Phenix refine runs fine without any errors but pushes the NO much further than the 1.9 angstrom specified by the links in the cif file. I have pasted the contents of the cif file below. The NO, Fe links are at the end of the file. Thank you for any help you can provide. -Yarrow # Files merged : Tue Oct 4 10:11:22 2011 # # CNL.cif # NO.cif # data_comp_list loop_ _chem_comp.id _chem_comp.three_letter_code _chem_comp.name _chem_comp.group _chem_comp.number_atoms_all _chem_comp.number_atoms_nh _chem_comp.desc_level CNL CNL Unknown ligand 29 11 . NO NO Unknown ligand 2 2 . # data_comp_CNL # loop_ _chem_comp_atom.comp_id _chem_comp_atom.atom_id _chem_comp_atom.type_symbol _chem_comp_atom.type_energy _chem_comp_atom.partial_charge _chem_comp_atom.x _chem_comp_atom.y _chem_comp_atom.z CNL C1 C CT . 55.3085 -9.1280 -43.0216 CNL C2 C CH2 . 55.6432 -10.5699 -43.1750 CNL C3 C CH2 . 54.6509 -11.3139 -43.9725 CNL C4 C CH1 . 53.4902 -10.4784 -44.3504 CNL C5 C CH2 . 53.9278 -9.3349 -45.0693 CNL C6 C CH2 . 54.8932 -8.4964 -44.3064 CNL C7 C CH3 . 56.3801 -8.3679 -42.3275 CNL C8 C CT . 52.9353 -9.9244 -43.0573 CNL C9 C CH3 . 52.3495 -11.0301 -42.2453 CNL C10 C CH3 . 51.8314 -8.9341 -43.2982 CNL O O O2 . 54.1049 -9.2461 -42.2221 # loop_ _chem_comp_bond.comp_id _chem_comp_bond.atom_id_1 _chem_comp_bond.atom_id_2 _chem_comp_bond.type _chem_comp_bond.value_dist _chem_comp_bond.value_dist_esd CNL C1 C2 single 1.488 0.020 CNL C1 C6 single 1.491 0.020 CNL C1 C7 single 1.486 0.020 CNL C1 O single 1.450 0.020 CNL C2 C3 single 1.475 0.020 CNL C3 C4 single 1.479 0.020 CNL C4 C5 single 1.420 0.020 CNL C4 C8 single 1.512 0.020 CNL C5 C6 single 1.489 0.020 CNL C8 C9 single 1.492 0.020 CNL C8 C10 single 1.502 0.020 CNL C8 O single 1.589 0.020 # loop_ _chem_comp_angle.comp_id _chem_comp_angle.atom_id_1 _chem_comp_angle.atom_id_2 _chem_comp_angle.atom_id_3 _chem_comp_angle.value_angle _chem_comp_angle.value_angle_esd CNL C3 C2 C1 113.16 3.000 CNL C5 C6 C1 112.56 3.000 CNL C8 O C1 110.85 3.000 CNL C6 C1 C2 112.60 3.000 CNL C7 C1 C2 112.43 3.000 CNL O C1 C2 99.48 3.000 CNL C4 C3 C2 112.41 3.000 CNL C5 C4 C3 110.02 3.000 CNL C8 C4 C3 106.05 3.000 CNL C6 C5 C4 113.20 3.000 CNL C9 C8 C4 109.75 3.000 CNL C10 C8 C4 111.96 3.000 CNL O C8 C4 109.61 3.000 CNL C8 C4 C5 104.53 3.000 CNL C7 C1 C6 112.76 3.000 CNL O C1 C6 106.18 3.000 CNL O C1 C7 112.51 3.000 CNL C10 C8 C9 106.70 3.000 CNL O C8 C9 108.62 3.000 CNL O C8 C10 110.10 3.000 # loop_ _chem_comp_tor.comp_id _chem_comp_tor.id _chem_comp_tor.atom_id_1 _chem_comp_tor.atom_id_2 _chem_comp_tor.atom_id_3 _chem_comp_tor.atom_id_4 _chem_comp_tor.value_angle _chem_comp_tor.value_angle_esd _chem_comp_tor.period CNL Var_01 C4 C8 O C1 10.40 30.0 3 CNL Var_02 C9 C8 O C1 130.31 30.0 3 CNL Var_03 C10 C8 O C1 -113.19 30.0 3 # loop_ _chem_comp_chir.comp_id _chem_comp_chir.id _chem_comp_chir.atom_id_centre _chem_comp_chir.atom_id_1 _chem_comp_chir.atom_id_2 _chem_comp_chir.atom_id_3 _chem_comp_chir.volume_sign CNL chir_01 C1 C6 C7 O both CNL chir_02 C4 C3 C5 C8 both # data_comp__NO # loop_ _chem_comp_atom.comp_id _chem_comp_atom.atom_id _chem_comp_atom.type_symbol _chem_comp_atom.type_energy _chem_comp_atom.partial_charge _chem_comp_atom.x _chem_comp_atom.y _chem_comp_atom.z NO N N N . -5.7690 4.3760 32.3600 NO O O O . -4.8990 5.2460 32.3600 # loop_ _chem_comp_bond.comp_id _chem_comp_bond.atom_id_1 _chem_comp_bond.atom_id_2 _chem_comp_bond.type _chem_comp_bond.value_dist _chem_comp_bond.value_dist_esd NO N O double 1.150 0.02 # data_link_list loop_ _chem_link.id _chem_link.comp_id_1 _chem_link.mod_id_1 _chem_link.group_comp_1 _chem_link.comp_id_2 _chem_link.mod_id_2 _chem_link.group_comp_2 _chem_link.name HEM-CYS HEM . . CYS . . bond_CYS-SG_=_HEM-FE NO -HEM HEM . . NO . . bond_HEM-FE_=_NO-N # data_link_HEM-CYS # loop_ _chem_link_bond.link_id _chem_link_bond.atom_1_comp_id _chem_link_bond.atom_id_1 _chem_link_bond.atom_2_comp_id _chem_link_bond.atom_id_2 _chem_link_bond.type _chem_link_bond.value_dist _chem_link_bond.value_dist_esd HEM-CYS 1 FE 2 SG . 2.300000 0.020 # loop_ _chem_link_angle.link_id _chem_link_angle.atom_1_comp_id _chem_link_angle.atom_id_1 _chem_link_angle.atom_2_comp_id _chem_link_angle.atom_id_2 _chem_link_angle.atom_3_comp_id _chem_link_angle.atom_id_3 _chem_link_angle.value_angle _chem_link_angle.value_angle_esd HEM-CYS 2 SG 1 FE 1 NC 109.471221 3.000 HEM-CYS 1 FE 2 SG 2 CB 109.471221 3.000 # data_link_NO -HEM # loop_ _chem_link_bond.link_id _chem_link_bond.atom_1_comp_id _chem_link_bond.atom_id_1 _chem_link_bond.atom_2_comp_id _chem_link_bond.atom_id_2 _chem_link_bond.type _chem_link_bond.value_dist _chem_link_bond.value_dist_esd NO -HEM 1 N 2 FE . 1.900000 0.020 # loop_ _chem_link_angle.link_id _chem_link_angle.atom_1_comp_id _chem_link_angle.atom_id_1 _chem_link_angle.atom_2_comp_id _chem_link_angle.atom_id_2 _chem_link_angle.atom_3_comp_id _chem_link_angle.atom_id_3 _chem_link_angle.value_angle _chem_link_angle.value_angle_esd NO -HEM 2 FE 1 N 1 O 140 3.000 NO -HEM 1 N 2 FE 2 NC 103 3.000 -- Yarrow Madrona Graduate Student Molecular Biology and Biochemistry Dept. University of California, Irvine Natural Sciences I, Rm 2403 Irvine, CA 92697

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Mn - O distances
by Timothy Springer 30 Nov '11

30 Nov '11

Hi, We are refining structures with Ca binding sites that are replaced by Mn. Using the coordination restraints in Phenix (distance only) obtained with phenix.metal_coordination, we wind up with the ligands coming somewhat too close, so there is positive density on the opposite side of the ligating residue from the metal. We may have a series of problems, including incomplete replacement of Ca by Mn. However, the bigger issue I want to address is coordination number. In the work by Shannon and Prewitt, such as Acta Cryst. B25, 925, metal oxides are examined, and the point is made that the Mn-O distance with a coordination number of 6 is shorter than for 7. Ca commonly has either 6 or 7 ligands, and with 7 ligands (most common) the O cannot squeeze as tightly together and are farther away from Ca. Mn more commonly has 6 ligands, but can have 7. What are the distance restraints in Phenix based on? They seem similar to those in Harding MM, Acta Cryst D62, 678 (2006). This paper lumps measurements for different coordination numbers together for Mn-O and Ca-O distances, but not for Co, Cu, and Zn. It does seem to help to add metal ion restraints in Phenix. Things don't seem to come out as well without them. Would it be helpful to treat 6 and 7-coordinate metals differently? Or should we just loosen the restraints? How does Refmac treat metals? One does not need to add restraints in its case. With my best regards, Tim Timothy A. Springer, Ph.D. Latham Family Professor of Biological Chemistry and Molecular Pharmacology Harvard Medical School http://idi.harvard.edu/springer Immune Disease Institute springer(a)idi.harvard.edu Program in Cellular and Molecular Medicine, Dept. Medicine Div. Hematology Children's Hospital Boston 3 Blackfan Circle, Rm 3103 phone: 617-713-8200 Boston MA 02115 fax: 617-713-8232

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Metal restraints at special position
by Yuri 29 Nov '11

29 Nov '11

I have a Mg2+ coordinated to 4 waters and 2 side chains. Some of the waters are at special postions. I generated the restraints file using "phenix.metal_cordination input.pdb" When I run refine with my .edits restraints file it crashes due to the special position. How do I handle this? Best, -- Yuri Pompeu

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phenix-1.7.2-x refine error
by Christoph Parthier 25 Nov '11

25 Nov '11

Dear Phenix developers, Using the current phenix version, refinements of a 'certain structure' always stop with the error message quoted below, while the refinement of other 'similar structures' work flawlessly. In the error case the three scheduled macrocycles of refinement seem to finish (the refined PDB is there) but at there seems to be problem in finishing the job - the output MTZ file has zero byte length and the last line in refine.log is: ============================== Exporting results ============================== This occurs with several 1.7.2-x versions of phenix, I'm not sure about 1.7.1-x. Interestingly, the 'problem structure' can be refined without problems using the same input files in phenix-1.7-650. Any idea whether this is due to an installation problem or a bug? Thanks, Christoph Here's the error message: MemoryError : Traceback: File "/cryst/phenix-1.7.2-869/cctbx_project/libtbx/thread_utils.py", line 229, in run return_value = self._target(self._args, self._kwargs, self._c) File "/cryst/phenix-1.7.2-869/cctbx_project/libtbx/runtime_utils.py", line 72, in __call__ result = self.target() File "/cryst/phenix-1.7.2-869/phenix/phenix/refinement/runtime.py", line 67, in __call__ call_back_handler=callback) File "/cryst/phenix-1.7.2-869/phenix/phenix/refinement/command_line.py", line 115, in run map_manger.write_files() File "/cryst/phenix-1.7.2-869/phenix/phenix/refinement/driver.py", line 1535, in write_files map_coeff_dataset=self.write_mtz_file(), File "/cryst/phenix-1.7.2-869/phenix/phenix/refinement/driver.py", line 1524, in write_mtz_file params = self.map_params.map_coefficients) File "/cryst/phenix-1.7.2-869/cctbx_project/mmtbx/maps/__init__.py", line 502, in __init__ coeffs = map_coefficients_from_fmodel(fmodel = fmodel, params = mcp) File "/cryst/phenix-1.7.2-869/cctbx_project/mmtbx/maps/__init__.py", line 353, in map_coefficients_from_fmodel fill_mode = "dfmodel") File "/cryst/phenix-1.7.2-869/cctbx_project/mmtbx/f_model.py", line 1887, in electron_density_map fill_mode = fill_mode) File "/cryst/phenix-1.7.2-869/cctbx_project/mmtbx/map_tools.py", line 114, in __init__ update_scaling = update_scaling) File "/cryst/phenix-1.7.2-869/cctbx_project/mmtbx/f_model.py", line 1663, in fill_missing_f_obs fmodel=self, fill_mode=fill_mode, update_scaling=update_scaling) File "/cryst/phenix-1.7.2-869/cctbx_project/mmtbx/missing_reflections_handler.py", line 131, in fill_missing_f_obs fmodel = select_by_map_cc(fmodel = fmodel.deep_copy())) File "/cryst/phenix-1.7.2-869/cctbx_project/mmtbx/missing_reflections_handler.py", line 85, in select_by_map_cc fourier_coefficients = coeffs) File "/cryst/phenix-1.7.2-869/cctbx_project/cctbx/miller/__init__.py", line 3688, in __init__ conjugate_flag=True) Platform info: __FILE__ = /net/longnose/scratch2/phenix/phenix-1.7.2-869/cctbx_project/boost_adaptbx/meta_ext.cpp __DATE__ = Sep 23 2011 __TIME__ = 00:13:14 __i386__ __linux __GNUC__ = 3 __GNUC_MINOR__ = 4 __GNUC_PATCHLEVEL__ = 2 boost::python::cxxabi_cxa_demangle_is_broken(): false __GXX_WEAK__ = 1 __VERSION__ = 3.4.2 20041017 (Red Hat 3.4.2-6.fc3) FE_INEXACT = 32 FE_DIVBYZERO = 4 FE_UNDERFLOW = 16 FE_OVERFLOW = 8 FE_INVALID = 1 FE_ALL_EXCEPT = 61 BOOST_LIB_VERSION = 1_48 PY_VERSION = 2.7.2 PYTHON_API_VERSION = 1013 sizeof(bool) = 1 sizeof(short) = 2 sizeof(int) = 4 sizeof(long) = 4 sizeof(std::size_t) = 4 sizeof(void*) = 4 sizeof(long long) = 8 sizeof(float) = 4 sizeof(double) = 8 sizeof(long double) = 12 sizeof(boost::int32_t) = 4 sizeof(boost::uint32_t) = 4 sizeof(wchar_t) = 4 __PTRDIFF_TYPE__ Py_USING_UNICODE sizeof(PY_UNICODE_TYPE) = 2 gnu libc version: 2.6.1 BOOST_ADAPTBX_TYPE_ID_SIZE_T_EQ_UNSIGNED os.name: posix sys.platform: linux2 sys.byteorder: little platform.platform(): Linux-2.6.22.13-GOLIAT-0.3-bigsmp-i686-with-SuSE-10.3-i586 platform.architecture(): ('32bit', 'ELF') floating_point_exceptions.division_by_zero_trapped: False floating_point_exceptions.invalid_trapped: False floating_point_exceptions.overflow_trapped: False number of processors: 8 Memory total: 4,238,028,800 Memory free: 3,715,174,400 import thread: OK "hello" = ['h', 'e', 'l', 'l', 'o'] u"hello" = ['h', '\x00', 'e', '\x00', 'l', '\x00', 'l', '\x00', 'o', '\x00'] u"\u00C5" = ['\xc5', '\x00'] as utf-8 = ['\xc3', '\x85'] LATIN CAPITAL LETTER A WITH RING ABOVE = Ã

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回复：phenixbb Digest, Vol 72, Issue 10
by dingding830106＠sina.com 25 Nov '11

25 Nov '11

Dear Thomas: I try running phenix.autosol instead of phenix.solve, and it solve this problem. Thanks a lot! Dingwei ----- 原始邮件 ----- 发件人：phenixbb-request(a)phenix-online.org 收件人：phenixbb(a)phenix-online.org 主题：phenixbb Digest, Vol 72, Issue 10 日期：2011年11月23日 01点08分 Message: 14 Date: Tue, 22 Nov 2011 10:08:46 -0700 (MST) From: "Thomas C. Terwilliger" <terwilliger(a)lanl.gov> To: "PHENIX user mailing list" <phenixbb(a)phenix-online.org> Subject: Re: [phenixbb] solve/resolve problem Message-ID: <52791.128.165.72.7.1321981726.squirrel(a)webmail.lanl.gov> Content-Type: text/plain;charset=iso-8859-1 I'm sorry for the problem! I don't recognize this error (the message solve is giving you is just saying that it has finished, unfortunately). Can you possibly (off-list) send me your input script and the output log file and I'll have a look? Or even better, try running phenix.autosol on the data and perhaps that will solve the problem! All the best, Tom T >> >> >> Dear all >> when I use SOLVE to deal with the SAD data, it will stop with a error >> message: >> >> ???STOP at >> /net/longnose/scratch2/phenix/phenix-1.7.2-869/solve_resolve/solve/solve_2.cpp(3133)??? >> Can you tell me what happen? >> >> wding >> >> _______________________________________________ >> phenixbb mailing list >> phenixbb(a)phenix-online.org >> http://phenix-online.org/mailman/listinfo/phenixbb

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measuring angle
by Hena Dutta 23 Nov '11

23 Nov '11

Hi, Could you please tell me how I can measure angle between two helices. Can COOT or PYMOL measure this? I have another question. In PDBSET, I can use CHAIN command in shell script to write a pdb file with a desired chain ID. What is the command in shell script to write a pdb file with a desired SEGID? As for example:- pdbset xyzin start.pdb xyzout end.pdb <<eof >& pdbset.log ROTATE [INVERT] [MATRIX] values CHAIN A end eof This will change the chain ID to A after rotation. But, I also like to give a segid in the end coordinate. Thank you in advance and have a nice THANKS GIVING WEEKEND Hena

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reference model restrain error
by Stephan Barden 23 Nov '11

23 Nov '11

Dear all, I'm facing a problem with a fresh (yesterday) installation of phenix 1.7.2-869 refining a structure with 6 molecules per ASU at 3.25 A and using a different reference structure with 1 mol/ASU at higher resolution. I wrote an additional parameter file to assign the reference model to each of the six molecules, which worked well with an older version of phenix. After the upgrade neither taking the additional parameter file, nor auto alignment worked for me. The error comming up is always: RuntimeError : Duplicate sequence number and insertion code. Traceback: File "/sw/phenix-1.7.2-869/cctbx_project/libtbx/thread_utils.py", line 229, in run return_value = self._target(self._args, self._kwargs, self._c) File "/sw/phenix-1.7.2-869/cctbx_project/libtbx/runtime_utils.py", line 72, in __call__ result = self.target() File "/sw/phenix-1.7.2-869/phenix/phenix/refinement/runtime.py", line 67, in __call__ call_back_handler=callback) File "/sw/phenix-1.7.2-869/phenix/phenix/refinement/command_line.py", line 75, in run overwrite = command_line_interpreter.command_line.options.overwrite) File "/sw/phenix-1.7.2-869/phenix/phenix/refinement/driver.py", line 209, in __init__ log=self.log) File "/sw/phenix-1.7.2-869/cctbx_project/mmtbx/torsion_restraints/reference_model.py", line 145, in __init__ self.get_reference_dihedral_proxies() File "/sw/phenix-1.7.2-869/cctbx_project/mmtbx/torsion_restraints/reference_model.py", line 611, in get_reference_dihedral_proxies log=self.log) File "/sw/phenix-1.7.2-869/cctbx_project/mmtbx/torsion_restraints/reference_model.py", line 398, in process_reference_groups raise e Has anyone observed a similar problem? Are there any suggestions? Thanks, StephanB.

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solve/resolve problem
by dingding830106＠sina.com 22 Nov '11

22 Nov '11

Dear all when I use SOLVE to deal with the SAD data, it will stop with a error message: “STOP at /net/longnose/scratch2/phenix/phenix-1.7.2-869/solve_resolve/solve/solve_2.cpp(3133)” Can you tell me what happen? wding

2 1

How to reduce clashscore value
by CelinaSocek 22 Nov '11

22 Nov '11

Hi all, I'm now using phenix to refine a small protein about 300 residues long. The resolution of my data is about 2.9 angstrom. Currently I got a refined model with good R-factors about 23/26, RMSD very reasonable and no Ramanchandran outliers. However, I found that the clashscore is extremely high: 63!! And rotamer outliers are also a lot: 8.5%. I wonder, what kind of stretagy I can use to reduce this? Thank you very much! best, Celina

6 16

test_hhr
by Alexander Batyuk 21 Nov '11

21 Nov '11

Dear all, The phenix_regression.wizards.test_command_line_rosetta_quick_tests command hangs at the test_hhr step in phenix-dev-910 on Mac OS X 10.6.8. What could be the reason for that? What kind of log files should I post? The firewall allowed to fetch files from the net. Best wishes, Alex -- Alex Batyuk The Plueckthun Lab www.bioc.uzh.ch/plueckthun

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Re: [phenixbb] How to reduce clashscore value
by CelinaSocek 20 Nov '11

20 Nov '11

Thank you Nat! I will try to fix as many clashes as I can in coot, and hope that I can manage to reduce it to around 20. ;) Also thank other suggestions and discussions! best, Celina > > Which version are you using? We made some changes over the summer > that improve the geometry, especially the clashscore - these are > present in version 1.7.2. If you're still using an earlier version, > this might largely fix the problem. However, if there is > conformational strain in the model, it is difficult to fix severe > clashes without further rebuilding. You should inspect the clashes in > Coot (the Phenix GUI has shortcuts for this, but Coot alone also has > this capability) and fix as many as possible yourself. It is > recommended that you use explicit hydrogen atoms when doing this, > since the reason for clashes is often not obvious if only heavy atoms > are used. (You don't necessarily need to refine with heavy atoms > though - they're just an aid to visualizing clashes.) > > The rotamer problem may be related; there isn't much you can do with > these except fix them manually, but relieving some of the clashes may > help. The dihedral angle restraints simply aren't that strong, so in > areas of weak density it can be difficult to completely prevent > outliers. > > -Nat > > > ------------------------------ > >

1 0

multiple ligand conformations
by Leonard Thomas 20 Nov '11

20 Nov '11

Hello All, One of the groups here has run into a problem in the refinement of their structure or more specifically a ligand bound to the structure. Through a series of other experiments they know that a photo reaction occurs to the compound when exposed to high flux as found at your everyday synchrotron source. The exposure changes the bonding such that there are two conformations with a bit in between obviously. They collected 360 degrees worth of data and if the data is split you can model the two conformations depending which half of the data you use. They are trying to refine with all of the data and modeling of the ligand into the two conformations. In refmac they can model this with no problem but in Phenix the ligand adopts a chemically wrong conformation, sort of a halfway point between the two chemically relevant conformations. They have used Phenix to do similar refinements on other structures but it appears either the last release or the latest release is causing problems. They have started out with everything from 50% occupancy to shifting it towards on one conformation or the other and the ligand always ends up in the chemically wrong position. Data is in the 1.4-1.5 ang. range. Ideas? Thanks in advance. Len Leonard Thomas Ph.D. Macromolecular Crystallography Laboratory Manager University of Oklahoma Department of Chemistry and Biochemistry Stephenson Life Sciences Research Center 101 Stephenson Parkway Norman, OK 73019-5251 lmthomas(a)ou.edu http://barlywine.chem.ou.edu Office: (405)325-1126 Lab: (405)325-7571

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multiple ligand conformations
by Yuri 20 Nov '11

20 Nov '11

Hi, When you say "wrong postion", what does it mean? are the 2 ligands you are trying to refine being "pushed away" from each other? If that is the case first thing I would check is the ALTLOC comlumn of their pdb file entries. Make sure one is ALTLOC A and the other ALTLOC B. I have refined with ligands in four different positions before using phenix before and got satisfactory results... Hope this helps, -- Yuri Pompeu

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MR_ROSETTA
by Wei Shi 18 Nov '11

18 Nov '11

Hi all, I am trying to run phenix.mr_rosetta using the following script for rebuilding the model with Rosetta before MR from phenix website except omitting specifying ncs_copies number. Following is the script I am using: phenix.mr_rosetta \ seq_file = seq.dat \ data=coords1.mtz \ search_models=coords1.pdb \ run_prerefine=True \ number_of_prerefine_models=1000 \ fragment_files = test3.gz \ fragment_files = test9.gz \ rescore_mr.relax=False \ rosetta_models=20 \ space_group=p222 \ use_all_plausible_sg=False \ nproc=4 \ group_run_command=qsub\ When I run the above script, it gives the following error message: child process stderr output: command: 'qsub /home/wei/MR_ROSETTA_14/GROUP_OF_PLACE_MODEL_1/RUN_FILE_1' /bin/sh: qsub: not found Then, I omit the last line in the command “group_run_command=qsub\”. MR_ROSETTA seems to be running. But, it takes forever to run. My questions is: 1. Does anyone happen to know why it tells me “qsub: not found” when I include “group_run_command=qsub” in my script? 2. When I omit “group_run_command=qsub” in the script, mr_rosetta seems to be running. But it just gives me the following message and it takes forever to run. Almost 10h later, no job is finished. I don’t know whether this is normal. If not, any idea about why it’s so slow and any suggestions about how to speed up the run? Thank you so much! Splitting work into 1 jobs and running with 4 processors using sh background=True in /home/wei/MR_ROSETTA_15/GROUP_OF_PLACE_MODEL_1 Starting job 1...Log will be: /home/wei/MR_ROSETTA_15/GROUP_OF_PLACE_MODEL_1/RUN_FILE_1.log

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error: Duplicate selections
by Sebastiano Pasqualato 16 Nov '11

16 Nov '11

Hi all, sorry guys, this might be a silly one, but I can't see where I'm making the mistake. Whenever I turn on TLS refinement, I get this error message. And, as you can see, the Log file doesn't tell me much more. I have generated the TLS groups wit the 'TLS groups selection' tool in phenix. Any hint? Thanks in advance, ciao s -- Sebastiano Pasqualato, PhD Crystallography Unit IFOM-IEO Campus Cogentech - Consortium for Genomic Technologies via Adamello, 16 20139 - Milano Italy tel +39 02 9437 5172 fax +39 02 9437 5990

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Scattering from riding hydrogens?
by Damian Ekiert 16 Nov '11

16 Nov '11

Hello, I have a question regarding two parameters and how they affect riding hydrogens. contribute_to_f_calc = True high_resolution_limit_to_include_scattering_from_h = 1.6 At lower resolution, setting contribute_to_f_calc = false is frequently helpful when using riding hydrogens and has been discussed before. But what is high_resolution_limit_to_include_scattering_from_h = 1.6 doing? If scattering from hydrogens is only included at higher than 1.6A resolution, it would seem like contribute_to_f_calc = True/False would not have any effect at say, 3.5A, but comparing identical refinement runs with contribute_to_f_calc = True or contribute_to_f_calc = False clearly gives different results. Can hydrogens contribute to Fcalc in a way aside from their scattering, or is their contribution accounted for independent of the position of the riding hydrogen (e.g., additional scattering term added to the associated heavy atom)? I think I am misunderstanding what these two parameters are doing and would appreciate some clarification. Thanks, Damian Ekiert

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Multiple TLS groups per molecule
by Yarrow Madrona 15 Nov '11

15 Nov '11

Hi, I would like run TLS and individual isotropic refinement. I want to separate one molecule into four TLS groups. I havn't found documentation for this. Is the number of TLS groups automatically done by phenix refine when you tell it to run TLS refinement on the whole molecule? Thanks for your help -Yarrow -- Yarrow Madrona Graduate Student Molecular Biology and Biochemistry Dept. University of California, Irvine Natural Sciences I, Rm 2403 Irvine, CA 92697

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Small issue with residue PTR
by Terry Lang 14 Nov '11

14 Nov '11

Hey Everyone, I have found a small issue with atom naming for residue PTR. When phenix.ready_set adds hydrogens to the residue, it names the hydrogens connected to the CB atom to be HB3 and HB2. However, the hydrogens in the cif file located in chem_data/mon_lib are labeled HB1 and HB2. Manually changing either the cif file or the atom name in the pdb file solves the problem. Terry -- P. Therese Lang Post Doc Alber Lab, UC Berkeley

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How can I add another chain to my PDB by Coot
by Dialing Pretty 14 Nov '11

14 Nov '11

Dear All, By Phenix refine I got a PDB (Only one chain) and mtz output files. After analysis by Coot I find I need to add a protein fragment so that a large blob will disappear. I know I use Baton to construct the protein fragment. Will you please tell me how can I input the sequence file of the protein fragment so that I can refine the protein fragment by Coot? I am looking forward to getting your reply. Regards. Dialing

2 1

twin/pseudo-symmetry question
by Green, Todd 11 Nov '11

11 Nov '11

Hello all- I have a question regarding the possibility of twinning and or psuedo-symmetry. I have a crystal that processes well in R32, ie. less than 6% r-merge at 2.2 angstrom. We collected multiple potential derivatives and were able to get some phasing from one that was good enough to model in the helices. The strange thing is that when looking at the harker sections there were a lot of unexplained strong peaks. And there is a very narrow range of parameters that we could get the sites with Shelx and end up with interpretable maps(i know that this part might not be unusual). My first thought was that there could be twinning. Since there is no twin law for this space group, I thought that it might suggest that there was twinning in a lower symmetry space group and/or that we have a pseudo-R32 crystal. Processing works well in C2 and R3, as expected. In those cases Xtriage suggests that the real symmetry is likely to be R32. In the case of C-2, xtriage suggetss if it is twinned then it is about 45% twinned. That's the background. Fast forward with the help of phenix Autobuild and some manual correction, we have been able to refine the structure with the R32 processed data(with tls) to r_work = 0.1894, r_free = 0.2287, bonds = 0.007, angles = 0.908 at 2.2 angstrom with almost everything accounted for. I think I should be quite comfortable with this. BUT, I'm still wondering about those Harker sections. I've been reading the manuscripts of Dauter regarding twinning and I think I am at this point more curious than anything. But not leaving well enough alone, I went back to the data processed in C2. I can easily do molecular replacement, following refinement at 2.3 angstrom(I need a lot more frames for this sg so the cutoffs are a bit lower but r-merge is ~ the same as R32) with TLS I get r_work = 0.1850, r_free = 0.2249, bonds = 0.007, angles = 0.946. this doesn't seem significant to me. However if I refine with the two possible twin operations, the values drop with one being better than the other. both have the same starting model: r_work = 0.1639 r_free = 0.1880 bonds = 0.006 angles = 0.902 r_work = 0.1582 r_free = 0.1866 bonds = 0.006 angles = 0.891 The twin fraction from the refined pdb header is 0.544 for the better statistical model and the r-values seem too low for 2.3 angstrom data. Is the high twin fraction suggestive of the higher symmetry space group or inconclusive towards that. of interest is that the maps look better to me than the r32 maps. by that i mean that the maps don't have what i would call minor dots of negative density for some(not a lot) of the side chains as we see for some side chains in the R32 case. also some side chains look better in the C2 twin refined case. Lastly for some of the monomers(there are now 6 copies versus 2 in the R32 case), I can add an additional residue or two on the termini which are not seen before. I wonder if this also suggests that the true space group is C2. Are these r-values too low? does the difference in values according to each twin law mean something? In the end, the models are essentially the same in either space group (with the exception of a couple of residues at the termini). So, I don't think I learn much one way or the other. But the curiocity keeps coming back. So is it likely to be R32 or C2 or C2 with a hefty twin fraction? Anyone have an explanation? Thanks in advance- Todd

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peptide link problem solved LINKR in pdb is not recognized but LINK is
by Christian Roth 10 Nov '11

10 Nov '11

Hi, In my pdb from Refmac the keyword LINKR is used but only LINK is interpreted by phenix. I changed this and now it works as it should. Sorry, a careful analysis sometimes help. Regards Christian

1 0

peptide link
by Christian Roth 10 Nov '11

10 Nov '11

Hi, I have an modified aminoacid in my peptide chain (backbone modified). I have a cif file and I refined it previously in Refmac. I put the Link definition in the pdb and Refmac has interpreted the peptide link as I wanted. Now I did a run in phenix to compare the results and the chain is broken I created the SNN cif file with ReadySet Reel and I tried to incorporate the link definition via GUI in the following way apply_cif_link: data_link: TRANS residue_selection_1: chain A and resseq 366 residue_selection_2: chain A and resseq 367 apply_cif_link: data_link: TRANS residue_selection_1: chain A and resseq 367 residue_selection_2: chain A and resseq 368 Model: "" Number of chains: 12 Chain: "A" Number of atoms: 7983 Number of conformers: 2 Conformer: "A" Number of residues, atoms: 496, 7926 Unusual residues: {'SNN': 1} Classifications: {'undetermined': 1, 'peptide': 495} Modifications used: {'COO': 1, 'NH3': 1} Link IDs: {'PTRANS': 37, 'TRANS': 456, None: 2} Not linked: pdbres="ASP A 366 " pdbres="SNN A 367 " Not linked: pdbres="SNN A 367 " pdbres="GLY A 368 " Chain breaks: 1 Unresolved chain link dihedrals: 1 Unresolved non-hydrogen bonds: 1 Unresolved non-hydrogen angles: 1 This fails with an error message that it cannot interpret the links. In my previous pdbs I have also defined the atoms which I wanted to link. Maybe I have to do this also somhow in Phenix. I have tried to extract the Link definition using phenix.link_edits but the resulting .edits file is empty. How can I resolve issue? Thanks Christian

2 1

Rebetta fragment library
by Wei Shi 10 Nov '11

10 Nov '11

Hi everyone, I am trying to generate a fragment library in Rebetta server for my sequence of interest to use with mr_rosetta. I can open the 9-mer and 3-mer fragment results: aat000_09_05.200_v1_3 and aat000_03_05.200_v1_3, but didn't see link to download these two files. Does anyone know how to download these two files? If I do copy and paste, what file type or format is compatible with mr_rosetta? Thank you so much! Best, Wei

2 2

define angle between groups of atom 'planes' for refinement restraint?
by Francis E Reyes 10 Nov '11

10 Nov '11

Hi all I was wondering if there was language in the monomer restraint libraries (.cif) or a custom phenix.refine geometry restraint a that defines an angle between two planes, where each plane is a group of coplanar atoms. Thanks! F --------------------------------------------- Francis E. Reyes M.Sc. 215 UCB University of Colorado at Boulder

5 4

nproc for autobuild
by Michael Thompson 09 Nov '11

09 Nov '11

Hello, I apologize if this question seems very basic, but I am new to phenix.autobuild. I would like to set up a series of phenix.autobuild runs on our cluster, and would like to maximize the speed. I am trying to make single rebuilt models using the command below: phenix.autobuild data=data.mtz model=coords.pdb map_file=map_coeffs.mtz multiple_models_number=1 n_cycle_rebuild_max=5 ncycle_refine=5 s_annealing=true refine_with_ncs=True place_waters=True nproc=?? run_command=/home/qsub.sh The AutoBuild documentation says "if you are using rebuild_in_place=False, then use nproc=4" and "if you are using rebuild_in_place=True, then use nproc=5. (Any more will not make any difference)." My interpretation of the documentation is that for the above AutoBuild run with multiple_models_number=1, I should set nproc=5 (or 4?). Is this correct? Also, if I were to change the command so that multiple_models_number=10, should I then use nproc=50 (i.e. 5 processors per model), or is it still the case that setting nproc>5 doesn't make a difference? Thanks in advance for your help! Mike -- Michael C. Thompson Graduate Student Biochemistry & Molecular Biology Division Department of Chemistry & Biochemistry University of California, Los Angeles miket(a)chem.ucla.edu

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phenix.phaser output .param file
by G Y 08 Nov '11

08 Nov '11

Dear Experts, I run my script for phenix.phaser in bash shell and one of the output file is filename.param (please note there is no "s" at the end of param) There are only two lines inside this file: # [no title set] TNCS IGNORE ON I do not really know what this file doing for. And, if I run the phaser from GUI, I will not find any .param file. What is this file doing for? Is it some kind of redundant information which is not useful at all? What should I edit in input params.eff file to avoid this output file? I would appreciate to any help from you. Thanks. Best, G

3 2

Constrained group refinement
by Christian Roth 08 Nov '11

08 Nov '11

Dear all, I defined the following contrained groups which should a ligand in two alternative forms and an ion at the same position refine to an summed occupancy of 1. constrained_group { selection = chain Z and resname 2CL and altloc A selection = chain Z and resname 2CL and altloc B selection = chain r and resname Cl } constrained_group { selection = chain c and resname 2CL and altloc A selection = chain c and resname 2CL and altloc B selection = chain m and resname Cl } constrained_group { selection = chain N and resseq 69 and altloc A selection = chain N and resseq 69 and altloc B selection = chain o and resname 2Cl } } At the end I get an error because of the very small nonbonded interactions. it seems that my definition are not correct, but I am at the moment unsure why. Could someone point me to the mistake. Thanks in advace for your help Best Regards Christian

2 1

Constrained group refinement Addendum
by Christian Roth 08 Nov '11

08 Nov '11

Do the ions have to be altlocC for the group definition? Best Regards Christian

1 0

Cross Validation Reflection Set question
by Yuri 07 Nov '11

07 Nov '11

Thanks for the replies. >I just tried doing this, and it looks like the R-free flags will cover >the full resolution range, at least with the current code. By current code, you mean 1.7.2-869 and newer, right? >Is this really necessary in this case (refine against lower res data, >then continue with the whole data set I think I have a backbone shift in this structure (relative to native protein used for MR) so I wanted to do it this way befor trying to go all the way down to 2A. One last question does phnix do NCS averaging to improve maps? -- Yuri Pompeu

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Re: [phenixbb] AutoBuild runtime
by Nathaniel Echols 07 Nov '11

07 Nov '11

On Mon, Nov 7, 2011 at 9:14 AM, Shya Biswas <shyabiswas(a)gmail.com> wrote: > Thanks for the suggestions. Unfortunately my MR solution is not good enough > to get a good map. Autobuild does give me a solution when i put in my > sequence but the map does not look good. I was wondering if the final model > that Autobuild gives has undergone density modification. Strictly speaking, it's the map that undergoes density modification - but yes, this will be done unless you explicitly disable it. -Nat

1 0

Cross Validation Reflection Set question
by Yuri 07 Nov '11

07 Nov '11

Dear All, Here is the situation, I have data to 2 A. I refined the model to 3 A first with S.A. Now I want to use higher res data for the rest of refinement. My Rfree created in the first round when I only used data to 3A. Was Rfree set created using all the data or just up to 3A shell? or do I have to extend into higher res shells? one caviot is I had twin law h,-k,-h-l enabled when they were created. Thanks, -- Yuri Pompeu

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Re: [phenixbb] AutoBuild runtime
by Nathaniel Echols 05 Nov '11

05 Nov '11

On Sat, Nov 5, 2011 at 12:02 PM, Shya Biswas <shyabiswas(a)gmail.com> wrote: > I was running autobuild using my protein sequence and the best MR model that > I got out of phaser, however it is taking really long to finish the job. Is > there a way to reduce the time period? Several options: - turn on quick mode (quick=True, or equivalent button in GUI) - use multiple processors if you have them (nproc=X, or equivalent control in GUI) - cut back resolution: if you have really good and/or high-resolution data*, you may be able to get nearly as good a model with fewer reflections, and it will be much faster (mostly due to refinement time, I think). However, this can also significantly degrade your model if the data aren't that great. - instead of AutoBuild, use phenix.phase_and_build (also in the GUI), which is basically the building procedure from AutoSol. It will usually not produce as complete a model (or R-factors as low) as AutoBuild, but it's much faster. -Nat (* the p9-sad tutorial is a good example of this - when we run workshops, we usually tell attendees to set the resolution limit for AutoSol to 3.0 instead of using all data to 1.7. The resulting model is nearly complete, and it finishes in less than half the time. Of course these data are unusually good...)

1 0

Call for submissions to Computational Crystallography Newsletter (corrected)
by Nigel Moriarty 05 Nov '11

05 Nov '11

Calling for articles and short communications of interest tostructural biologists. The deadline for publication in the January2012 issue is 1st Dec, 2011. The Computational Crystallography Newsletter (CCN) is an electronicnewsletter for structural biologists, and is published online every 6months. Feature articles, meeting announcements and reports can besubmitted to me at any time for consideration. Submission of text byemail or word-processing files using the CCN templates is requested.Past newsletters and the template are available atwww.phenix-online.org/newsletter. Cheers Nigel -- Nigel W. Moriarty Building 64R0246B, Physical Biosciences Division Lawrence Berkeley National Laboratory Berkeley, CA 94720-8235 Phone : 510-486-5709 Email : NWMoriarty(a)LBL.gov Fax : 510-486-5909 Web : CCI.LBL.gov

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Call for subscriptions to Computational Crystallography Newsletter
by Nigel Moriarty 04 Nov '11

04 Nov '11

Calling for articles and short communications of interest to structural biologists. The deadline for publication in the January 2012 issue is 1st Dec, 2011. The Computational Crystallography Newsletter (CCN) is an electronic newsletter for structural biologists, and is published online every 6 months. Feature articles, meeting announcements and reports can be submitted to me at any time for consideration. Submission of text by email or word-processing files using the CCN templates is requested. Past newsletters and the template are available at www.phenix-online.org/newsletter. Cheers Nigel -- Nigel W. Moriarty Building 64R0246B, Physical Biosciences Division Lawrence Berkeley National Laboratory Berkeley, CA 94720-8235 Phone : 510-486-5709 Email : NWMoriarty(a)LBL.gov Fax : 510-486-5909 Web : CCI.LBL.gov

1 0

metal coordination restraints
by Laurie Betts 04 Nov '11

04 Nov '11

How does PHENIX know where to look for proper bond lengths and angles for a metal ion I add to a protein structure - do I just add the metal into difference density and any waters, and then run ready set and it knows where to look for that particular metal and the atoms to which is is coordinated? And shouldn't there be a 'cif file that it outputs, or is that something that I need to get myself? Sorry it's still not obvious to me from the documentation. Thanks Laurie Betts

4 4

Postdoctoral Position at King's College London, UK
by Steiner, Roberto 04 Nov '11

04 Nov '11

A three-year postdoctoral position in the field of mechanistic enzymology is immediately available in the Steiner Laboratory of King’s College London. The salary is £33,193 per annum inclusive of London allowance. The project aims at studying the intriguing biological process of cofactor-independent oxygenation catalysis (1). To understand how dioxygen chemistry takes place in a cofactor-less manner we will use enzymes for which we have recently obtained structural information in various catalytically relevant states (2). The ideal candidate has a strong biochemistry/chemistry background, extensive experience in structural biology focused on enzyme mechanisms and an interest in molecular dynamics (MD). The MD work will be carried out in collaboration with Prof. Ceccarelli of the University of Cagliari, Italy, where the postdoc will be able to spend some time to improve his/her skills in MD techniques. The postdoc will also be in close contact with the Manchester group of Prof. Scrutton where complementary spectroscopic and kinetic studies will be carried out. This project will equip the post-holder with a rare and sought-after skill-set as well as a comprehensive overview of an inter-disciplinary study. To apply for this position go to http://www.kcl.ac.uk/depsta/pertra/vacancy/external/pers_detail.php?jobinde…. Please make sure you quote the reference number G6/JKA/772/11-JT. Informal enquiries are welcome at roberto.steiner(a)kcl.ac.uk<mailto:[email protected]>. The closing date for this application is 24 Nov. 2011. (1) Fetzner S. and Steiner RA (2010). Cofactor-independent oxidases and oxygenases. Appl. Microbiol. Biotechnol. 86, 791-804. (2) Steiner RA, Janssen HJ, Roversi P, Oakley OJ, Fetzner S (2010). Structural basis for cofactor independent dioxygenation of N-heteroaromatic compounds at the •/•-hydrolase fold. Proc. Natl. Acad. Sci. USA, 107, 657-662. Roberto Steiner, PhD Randall Division of Cell and Molecular Biophysics Group Leader King's College London Room 3.10A New Hunt's House Guy's Campus SE1 1UL, London, UK Tel 0044-20-78488216 Fax 0044-20-78486435 roberto.steiner(a)kcl.ac.uk<mailto:[email protected]>

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