- phenixbb - phenix-online.org

sugar chain cif file
by Daniele de Sanctis 09 Jul '08

09 Jul '08

Dear all, I have a trisaccharide in my structure, and I generate the cif file with elbow (see below). Unfortunately phenix.refine seems not recognizing the bonds C5-O1 between different units and is not keeping the chain together. As far as I could understand I should also use the keyword "apply_cif_link", but I couldn't find which syntax i should use. Thanks for the help Daniele # electronic Ligand Builder and Optimisation Workbench (eLBOW) # - a module of PHENIX version 1.3b (Mon Nov 20 17:20:00 2007) # - file written: Mon Jul 7 18:19:22 2008 # # Input file: a3.pdb # 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 AHR AHR 'Unknown ' ligand 15 9 . # data_comp_AHR # 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 AHR 'C5'' C CH3 . 61.3311 15.7148 36.7946 AHR 'C4'' C CR5 . 60.1817 16.4682 36.1126 AHR 'O4'' O O . 60.3257 17.5507 35.0934 AHR 'C3'' C CR5 . 58.6911 16.2438 36.3556 AHR 'O3'' O OC . 58.1296 15.2877 37.2130 AHR 'C2'' C CR5 . 57.9427 17.1885 35.4852 AHR 'O2'' O OC . 56.5500 17.3383 35.4371 AHR 'C1'' C CR5 . 58.9640 18.0045 34.6971 AHR 'O1'' O OH1 . 58.6701 18.9985 33.7515 AHR 'H5'1' H HCH3 . 61.2131 14.6537 36.6320 AHR 'H5'2' H HCH3 . 61.3175 15.9201 37.8548 AHR 'H5'3' H HCH3 . 62.2726 16.0401 36.3773 AHR 'H3'1' H H . 57.7021 15.7812 38.0734 AHR 'H2'1' H H . 56.1521 16.7529 34.6214 AHR 'H1'1' H HOH1 . 59.4063 19.7861 33.8153 # 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 AHR 'C5'' 'C4'' single 1.53429 0.02 AHR 'C4'' 'O4'' aromatic 1.49380 0.02 AHR 'C4'' 'C3'' aromatic 1.52685 0.02 AHR 'O4'' 'C1'' aromatic 1.48900 0.02 AHR 'C3'' 'O3'' double 1.40168 0.02 AHR 'C3'' 'C2'' aromatic 1.48663 0.02 AHR 'C2'' 'O2'' double 1.40154 0.02 AHR 'C2'' 'C1'' aromatic 1.52635 0.02 AHR 'C1'' 'O1'' single 1.40306 0.02 AHR 'H5'1' 'C5'' single 1.08000 0.02 AHR 'H5'2' 'C5'' single 1.08000 0.02 AHR 'H5'3' 'C5'' single 1.08000 0.02 AHR 'H3'1' 'O3'' single 1.08000 0.02 AHR 'H2'1' 'O2'' single 1.08000 0.02 AHR 'H1'1' 'O1'' single 1.08000 0.02 # 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 AHR 'O4'' 'C4'' 'C5'' 125.93952 3.0 AHR 'C3'' 'C4'' 'C5'' 126.05117 3.0 AHR 'H5'1' 'C5'' 'C4'' 109.48717 3.0 AHR 'H5'2' 'C5'' 'C4'' 109.48699 3.0 AHR 'H5'3' 'C5'' 'C4'' 109.47730 3.0 AHR 'C1'' 'O4'' 'C4'' 108.31507 3.0 AHR 'O3'' 'C3'' 'C4'' 126.06060 3.0 AHR 'C2'' 'C3'' 'C4'' 107.75208 3.0 AHR 'C3'' 'C4'' 'O4'' 108.00930 3.0 AHR 'C2'' 'C1'' 'O4'' 108.15545 3.0 AHR 'O1'' 'C1'' 'O4'' 125.92746 3.0 AHR 'H3'1' 'O3'' 'C3'' 109.52327 3.0 AHR 'O2'' 'C2'' 'C3'' 126.02920 3.0 AHR 'C1'' 'C2'' 'C3'' 107.76809 3.0 AHR 'C2'' 'C3'' 'O3'' 126.15656 3.0 AHR 'H2'1' 'O2'' 'C2'' 109.52075 3.0 AHR 'O1'' 'C1'' 'C2'' 125.91301 3.0 AHR 'C1'' 'C2'' 'O2'' 126.15898 3.0 AHR 'H1'1' 'O1'' 'C1'' 109.51700 3.0 AHR 'H5'2' 'C5'' 'H5'1' 109.46605 3.0 AHR 'H5'3' 'C5'' 'H5'1' 109.45474 3.0 AHR 'H5'3' 'C5'' 'H5'2' 109.45508 3.0 # 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 AHR CONST_01 'C2'' 'C1'' 'O4'' 'C4'' 0.00000 0.0 0 AHR CONST_02 'C1'' 'C2'' 'C3'' 'C4'' -0.00000 0.0 0 AHR CONST_03 'C2'' 'C3'' 'C4'' 'O4'' 0.00000 0.0 0 AHR CONST_04 'C3'' 'C2'' 'C1'' 'O4'' -0.00000 0.0 0 AHR CONST_05 'C1'' 'O4'' 'C4'' 'C3'' -0.00000 0.0 0 # loop_ _chem_comp_plane_atom.comp_id _chem_comp_plane_atom.plane_id _chem_comp_plane_atom.atom_id _chem_comp_plane_atom.dist_esd AHR plan-1 'C4'' 0.020 AHR plan-1 'O4'' 0.020 AHR plan-1 'C1'' 0.020 AHR plan-1 'C2'' 0.020 AHR plan-1 'C3'' 0.020 AHR plan-1 'C5'' 0.050 AHR plan-1 'O1'' 0.050 AHR plan-1 'O2'' 0.050 AHR plan-1 'O3'' 0.050 AHR plan-2 'C4'' 0.100 AHR plan-2 'O4'' 0.100 AHR plan-2 'C5'' 0.100 AHR plan-2 'C3'' 0.100 AHR plan-3 'C3'' 0.100 AHR plan-3 'O3'' 0.100 AHR plan-3 'C4'' 0.100 AHR plan-3 'C2'' 0.100 AHR plan-4 'C2'' 0.100 AHR plan-4 'O2'' 0.100 AHR plan-4 'C3'' 0.100 AHR plan-4 'C1'' 0.100 -- Daniele de Sanctis, PhD Homo sum humani nil alienum a me puto ______________________________________________________________ phone ++ 351 21 4469 662 fax ++ 351 21 4433 664 e-mail de.sanctisd(a)gmail.com, sanctis(a)itqb.unl.pt Mailing address: ITQB, Av. República, Apartado 127 2781-901 Oeiras Portugal

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using TLS files from Refmac
by nihmayerm 03 Jul '08

03 Jul '08

Hi, I've just started to learn how to use PHENIX. I'd like to continue a refinement started with REFMAC for which I already have refined TLS parameters initially generated using the WUSTL TLSMD server. Can I use the .tls file as input to PHENIX or do I have to redefine the TLS groups and tensors. Thanks

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Re: [phenixbb] distance restraints
by Ralf W. Grosse-Kunstleve 03 Jul '08

03 Jul '08

Hi Oliver, > I am about to define distance restraints for a metal coordination site > using a refinement.geometry_restraints.edits entry. Unfortunately, > two of the four ligand side chains come from a symmetry-related > molecule! What is the syntax to properly refer to a symm in such > a case? You have to use the "symmetry_operation" keyword in this input block: refinement.geometry_restraints.edits { bond { action = *add delete change atom_selection_1 = None atom_selection_2 = None symmetry_operation = None distance_ideal = None sigma = None slack = None } } With phenix.refine --show-defaults=all.help you get: symmetry_operation = None .help = "The bond is between atom_1 and symmetry_operation * atom_2, " "with atom_1 and atom_2 given in fractional coordinates. " "Example: symmetry_operation = -x-1,-y,z" The symmetry_operation must produce the fractional coordinates of atom_2 exactly (within floating-point precision). I.e. depending on where the atoms are, you may need -x+2,-y-3,z or similar. Let me know if you need help figuring out the fractional coordinates. Ralf

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special positions
by o.h.weiergraeber＠fz-juelich.de 03 Jul '08

03 Jul '08

Hello, a very simple question (although I could not find *anything* about this in the documentation!): What does phenix.refine expect as occupancy for an atom on a special position: reduced occupancy (like refmac) or full occupancy (like cns_solve)? Oliver ------------------------------- Dr. Oliver H. Weiergraeber Institute of Neurosciences and Biophysics Molecular Biophysics Research Centre Juelich D-52425 Juelich Germany Phone: +49-2461-612028 Fax: +49-2461-612020 ------------------------------- ------------------------------------------------------------------- ------------------------------------------------------------------- Forschungszentrum Juelich GmbH 52425 Juelich Sitz der Gesellschaft: Juelich Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 Vorsitzende des Aufsichtsrats: MinDir'in Baerbel Brumme-Bothe Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender), Dr. Ulrich Krafft (stellv. Vorsitzender), Prof. Dr. Harald Bolt, Dr. Sebastian M. Schmidt ------------------------------------------------------------------- -------------------------------------------------------------------

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Re: [phenixbb] special positions
by o.h.weiergraeber＠fz-juelich.de 03 Jul '08

03 Jul '08

Adding to my previous post, I have found another strange issue (possibly a bug?) concerning special positions: In my case, the "special" atom (a cation on a three-fold in sg I23), while being considered during refinement, seems to be completely omitted (or heavily downweighted) for map calculations! The 2fo-fc map shows a "hole" at this position, while there is huge difference density in the fo-fc map (largely irrespective of whether or not the occupancy is reduced in the input.) The same pdb file, used in cns just for map calculation, gives a beautiful density at the cation position, while the rest of the map is more or less identical. At the moment I cannot think of any error in the input since refinement of the atom does take place, with the proper restrictions due to the three-fold axis. But something is going seriously wrong. Any ideas? Oliver ------------------------------- Dr. Oliver H. Weiergraeber Institute of Neurosciences and Biophysics Molecular Biophysics Research Centre Juelich D-52425 Juelich Germany Phone: +49-2461-612028 Fax: +49-2461-612020 ------------------------------- ----- Original Message ----- From: o.h.weiergraeber(a)fz-juelich.de Date: Wednesday, July 2, 2008 2:55 pm Subject: [phenixbb] special positions > Hello, > > a very simple question (although I could not find *anything* about > this in the documentation!): > What does phenix.refine expect as occupancy for an atom on a > special position: reduced occupancy (like refmac) or full occupancy > (like cns_solve)? > > Oliver > > > > ------------------------------- > Dr. Oliver H. Weiergraeber > Institute of Neurosciences and Biophysics > Molecular Biophysics > Research Centre Juelich > D-52425 Juelich > Germany > Phone: +49-2461-612028 > Fax: +49-2461-612020 > ------------------------------- > > > > ------------------------------------------------------------------- > ------------------------------------------------------------------- > Forschungszentrum Juelich GmbH > 52425 Juelich > > Sitz der Gesellschaft: Juelich > Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 > Vorsitzende des Aufsichtsrats: MinDir'in Baerbel Brumme-Bothe > Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender), > Dr. Ulrich Krafft (stellv. Vorsitzender), Prof. Dr. Harald Bolt, > Dr. Sebastian M. Schmidt > ------------------------------------------------------------------- > ------------------------------------------------------------------- > _______________________________________________ > phenixbb mailing list > phenixbb(a)phenix-online.org > http://www.phenix-online.org/mailman/listinfo/phenixbb > ------------------------------------------------------------------- ------------------------------------------------------------------- Forschungszentrum Juelich GmbH 52425 Juelich Sitz der Gesellschaft: Juelich Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 Vorsitzende des Aufsichtsrats: MinDir'in Baerbel Brumme-Bothe Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender), Dr. Ulrich Krafft (stellv. Vorsitzender), Prof. Dr. Harald Bolt, Dr. Sebastian M. Schmidt ------------------------------------------------------------------- -------------------------------------------------------------------

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Fwd: [COOT] Using Coot with PHENIX
by Stephen Graham 02 Jul '08

02 Jul '08

Below is an email from Kevin Cowtan (posted on the COOT bb) that may be of interest to people who use COOT for building. Stephen ---------- Forwarded message ---------- From: Kevin Cowtan <cowtan(a)ysbl.york.ac.uk> Date: Jul 2, 2008 9:31 AM Subject: [COOT] Using Coot with PHENIX To: COOT(a)jiscmail.ac.uk There are some issues which may be affecting some people using Coot with PHENIX. If you try and use the two together in the wrong way, then you may get unexpected results. (Problems hashed out with help from Dirk). phenix.refine produces two different sets of output files. I quote from the documentation: At the end of refinement the program generates: ... two maps: likelihood weighted mFo-DFc and 2mFo-DFc. These are in ASCII X-PLOR format. A reflection file with map coefficients is also generated for use in Coot or XtalView (e.g. lysozyme_refine_001_map_coeffs.mtz); There are some CNS maps, which may be used in conventional graphics programs, and there is an MTZ file, which may be used in Coot or XtalView. The difference is important. Coot and XtalView have a fundamentally different concept of what a map is to other graphics programs. As a result they require different information. Phenix.refine recognises this and provides appropriate information for each type of program. In the last year we incorporated the ability to read CNS files into coot. As a result, some users have started reading the CNS map files into coot instead of the MTZ file. Unfortunately, this does not always work the way you would expect, because the map files has not been generated with Coot in mind. This may lead to misleading sigma levels, or, if the map is modified or masked in any way before giving it to Coot, much more serious artifacts. The solution is simple: When using Coot, use the MTZ file which the phenix developers have provided for that purpose, *not* the CNS map files. In addition to giving the right answers, there are some other benefits: - The MTZ is much smaller, in case you want to archive it. - Using auto-open mtz, you get both maps at once, and the difference map is automatically displayed as such, saving mouse clicks. - The spacegroup and cell information are in the file, so it works even if you don't open the PDB file first. .. You can stop reading here, the rest is detail for those who are interested: Coot and XtalView use a different representation of electron density, a continuous crystal representation. Most other graphics programs use a bounded box representation. The continuous crystal representation means that the electron density is everywhere, it is omnipresent. "If I scroll up to the heavens, density is there; if I place my ligand in the depths, density is there. If I drag over to the far side of the solvent, even there the density will guide my fitting." (*) To generate a continuous crystal representation, you need a complete and consistent description of the electron density over the asymmetric unit (any asymmetric unit - it doesn't matter where in space). The bounded box representation need the electron density over the volume of the molecule. It is not always possible to get the asymmetric unit representation from the bounded box representation, because in creating the bounded box some information may have been lost. However, you can always get it from an MTZ file, or from a map file on the condition that the map file is appropriately bounded. Kevin (*) Psalm 139 v8-10 -- Dr Stephen Graham Nuffield Medical Fellow Division of Structural Biology Wellcome Trust Centre for Human Genetics Roosevelt Drive Oxford OX3 7BN United Kingdom Phone: +44 1865 287 549

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distance restraints
by o.h.weiergraeber＠fz-juelich.de 02 Jul '08

02 Jul '08

Hello, I am about to define distance restraints for a metal coordination site using a refinement.geometry_restraints.edits entry. Unfortunately, two of the four ligand side chains come from a symmetry-related molecule! What is the syntax to properly refer to a symm in such a case? Oliver ------------------------------- Dr. Oliver H. Weiergraeber Institute of Neurosciences and Biophysics Molecular Biophysics Research Centre Juelich D-52425 Juelich Germany Phone: +49-2461-612028 Fax: +49-2461-612020 ------------------------------- ------------------------------------------------------------------- ------------------------------------------------------------------- Forschungszentrum Juelich GmbH 52425 Juelich Sitz der Gesellschaft: Juelich Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 Vorsitzende des Aufsichtsrats: MinDir'in Baerbel Brumme-Bothe Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender), Dr. Ulrich Krafft (stellv. Vorsitzender), Prof. Dr. Harald Bolt, Dr. Sebastian M. Schmidt ------------------------------------------------------------------- -------------------------------------------------------------------

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tlsanal
by john kryst 02 Jul '08

02 Jul '08

Hi all !! I have coupls of questions regarding TLS in phenix. 1. Has anyone tried using program tlsviewer with phenix refined pdb. It is not able to detect TLS groups unless you modify your residue range in the pdb to refmac convention. Is there any other program available to visualize the TLS movements. 2. I would like to use tlsanal to see how much is the contibution from TLS to the ADP. Is there any utility availble in TLS to do it. If i need to use tlsanal.. what should i modify in the pdb. thanks regards John

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Postdoctoral Position - Chemical Imaging of Plant Biomass with Micro- and Nano-Raman Spectroscopy
by Paul Adams 01 Jul '08

01 Jul '08

Postdoctoral Researcher Chemical Imaging of Plant Biomass with Micro- and Nano-Raman Spectroscopy Job ID: UCB-013 Institution: Energy Biosciences Institute, Berkeley California Date Opened: 5/10/2008 Position Description: Development of computational tools for the analysis of chemical imaging data. Computational construction of three- dimensional maps of plant cell wall material from Raman spectroscopy measurements. Position Responsibilities: Development of algorithms to indentify chemical species from Raman spectroscopy measurements. Processing of data to generate two-dimensional images of chemical components in plant cell wall material. Use of tomographic methods to construct three-dimensional images. Development of maximum likelihood methods to extract information from weak spectroscopic data. Position Qualifications: Strong computational skills with experience in their practical application to imaging or complex data analysis. Preference will be given to candidates with experience in the analysis of spectroscopic data or imaging of biological samples. Experience with programming languages: C/C++ and scripting languages: Python/ Perl. Demonstrated publication record in the computational analysis of data and algorithm development. Ability to work in a team environment and good communication skills. Ph.D. in physical chemistry, biology, physics, computer science or related field. See the program description for more details: http://energybiosciencesinstitute.org/index.php?option=com_content&task=vie… How to Apply: Submit a Letter of Interest, CV, and three (3) contacts for references via email to: Paul Adams Lawrence Berkeley Lab, BLDG 64R0121 1 Cyclotron Road Berkeley, CA 94720 510-486-4225 pdadams(a)berkeley.edu The University of California, Berkeley is an Equal Opportunity Employer committed to diversity in its staff, faculty, and student body, and invites all qualified people to apply, including minorities and women, veterans and individuals with disabilities. -- Paul Adams Adjunct Professor, Department of Bioengineering, U.C. Berkeley Tel: 510-486-4225, Fax: 510-486-5909 http://cci.lbl.gov/paul --

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Fwd: Re: help with refinement in Phenix
by hosur＠barc.gov.in 30 Jun '08

30 Jun '08

Hi PHENIX developers, I am forwarding herewith my correspondence with Dr. Pavel Afonine regarding a reinement issue in PHENIX. I would appreciate if other developers can help me with the solution before Pavel comes back on June 25th. Thanks. The requirement is to be able to refine a model in which a piece of electron density is interpreted as partial occupancy protein residue and a set of water molecules. Hosur M.V. ----- Forwarded message from Pavel Afonine <pafonine(a)lbl.gov> ----- Date: Sat, 14 Jun 2008 21:57:36 -0700 From: Pavel Afonine <pafonine(a)lbl.gov> Reply-To: Pavel Afonine <pafonine(a)lbl.gov> Subject: Re: help with refinement in Phenix To: hosur(a)barc.gov.in Hi Hosur, I'm out of town and not regular at email, so the delay with the answer,, sorry for this. Actually, it is the best to address your questions to phenixbb (http://www.phenix-online.org/mailman/listinfo/phenixbb) so all the PHENIX developers get it and you don't hang up with the delay if a particular person is temporarily absent. I will be back in office on June 25. Regarding your question: > In my case, the set of 4 water molecules has to have the same occupancy, and > this occupancy with the occupancy of a side chain must make up unity. That is > the sum of two occupancies must be unity. > This particular feature is currently not available in phenix.refine. I will add this option once I'm back in office. > If I understand correctly, if i identify each of the four water molecules by a > different altloc label, then the sum of 5 occupancies will be adjusted to one, > with the possibility of each water occupancy converging to different value. > Yes, this is expected behavior. > Further, the final occupancy would be close to 0.25 of the required value. The > complication, in my opinion, is because the set of four water molecules is not > like set of atoms that make one residue which can be assigned a single altloc > label. I hope I have been able to convey what I mean. Let me have the suitable > PDB, which I can try out. > Yes, this is very clear for me and like I said above I will add this feature to PHENIX as soon as I get back to office. All the best, Pavel. ----- End forwarded message ----- -------------------------------------------------

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