- phenixbb - phenix-online.org

Research Assistant Position in Structural Biology of Macromolecular Complexes
by Sebastian Klinge 11 Sep '13

11 Sep '13

*Research Assistant Position in Structural Biology of Macromolecular Complexes* The Rockefeller University, a premier biomedical research institute, seeks a Research Assistant to join our Laboratory of Protein and Nucleic Acid Chemistry. The successful applicant will be part of a creative and highly motivated team of biochemists and structural biologists, which are interested in the structure and function of multi-protein complexes involved in key steps of the Central Dogma of Molecular Biology. The laboratory houses a state of the art large scale fermenter, tissue culture and crystallization rooms and has access to the Rockefeller Structural Biology Resource Center with liquid handling and crystallization robots (Formulator by Formulatrix and Phoenix by Art Robbins respectively) and a Rigaku/MSC microMax 007 HF X-ray generator. B.S. or M.S. degree with a strong background in biochemistry or molecular biology is required. Experience with protein production in insect cells (preferably MultiBac) and familiarity with molecular biology techniques is essential. The ideal candidate will interact well with other members of the laboratory, be well organized and interested in working in a high quality research environment and collaborate closely with the principal investigator in running the laboratory. Responsibilities will include setting up an insect cell facility as well as general laboratory duties such as inventory, organization and pick-up of supplies and cataloging the laboratory's clone stocks. We offer a competitive salary, comprehensive benefits, and a beautiful working environment. To apply to this job, click the following URL, click on 'staff opportunities' and enter keyword 'IRC14241': http://www.rockefeller.edu/hr/career /The Rockefeller University is an Affirmative Action/Equal Employment Opportunity/VEVRAA employer./

1 0

Autobuild
by Heather L Condurso 07 Sep '13

07 Sep '13

I'm a bit confused about what is going on with my autobuild run. I solved a structure from anomalous data to 2.7A but many loops are missing. I ran phaser with the current model and native data that extends to 2.4A and got a solution and started autobuild from there. I used mostly the default settings and rebuild_in_place=False. After a pretty short time I realized the run was over and at the bottom of the log I see this: Cycle 3 R/Rfree=0.28/0.35 Built=488 Placed=467 AutoBuild_build_cycle AutoBuild Run 162 Fri Sep 6 14:33:39 2013 Deciding if we should continue... Recent R change per cycle: 0.0 Ending these build cycles as the recent change in R per cycle has been 0.0 and the required value of change is -0.005 and the R is somewhat acceptable at 0.276670644792 All done with build cycles in this region AutoBuild_set_up_build AutoBuild Run 162 Fri Sep 6 14:33:40 2013 All omit/non-omit regions completed finished AutoBuild Run 162 Fri Sep 6 14:33:40 2013 Finishing AutoBuild Run 162 Facts written to AutoBuild_run_162_/AutoBuild_Facts.dat AutoBuild Run 162 Summary of model-building for run 162 Fri Sep 6 14:33:40 2013 Files are in the directory: /Users/heather/Desktop/M/AutoBuild_run_162_/ Starting mtz file: /Users/heather/Desktop/M/ImportRawData_run_4_/A-3_xx_PHX.mtz Sequence file: /Users/heather/Desktop/M/m.pir Best solution on cycle: 2 R/Rfree=0.26/0.33 Summary of output files for Solution 1 from rebuild cycle 2 --- Model (PDB file) --- pdb_file: /Users/heather/Desktop/M/AutoBuild_run_162_/overall_best.pdb --- Model (CIF file) --- cif_pdb_file: /Users/heather/Desktop/M/AutoBuild_run_162_/overall_best.cif --- Refinement log file --- log_refine: /Users/heather/Desktop/M/AutoBuild_run_162_/overall_best.log_refine --- Model-building log file --- log: /Users/heather/Desktop/M/AutoBuild_run_162_/overall_best.log --- Model-map correlation log file --- log_eval: /Users/heather/Desktop/M/AutoBuild_run_162_/overall_best.log_eval --- 2FoFc and FoFc map coefficients from refinement 2FOFCWT PH2FOFCWT FOFCWT PHFOFCWT --- refine_map_coeffs: /Users/heather/Desktop/M/AutoBuild_run_162_/overall_best_refine_map_coeffs.mtz --- Data for refinement FP SIGFP PHIM FOMM HLAM HLBM HLCM HLDM FreeR_flag --- refine_data: /Users/heather/Desktop/M/AutoBuild_run_162_/overall_best_refine_data.mtz --- Density-modified map coefficients FWT PHWT --- denmod_map_coeffs: /Users/heather/Desktop//AutoBuild_run_162_/overall_best_denmod_map_coeffs.mtz You might consider making one very good model now with: phenix.autobuild \ data=/Users/heather/Desktop/M/AutoBuild_run_162_/overall_best_refine_data.mtz \ model=/Users/heather/Desktop/M/AutoBuild_run_162_/overall_best.pdb \ rebuild_in_place=True \ seq_file=/Users/heather/Desktop/M/m.pir My full sequence is 325 amino acids so only about 75% is build in. I am hoping autobuild can help find at least some of these missing residues. Why would the change in R be zero? What is meant by "You might consider making one very good model now with:"? I tried running autobuild with these new files and rebuild_in_place=true and get the same type of message. Is this the best that autobuild can do? I also ran the phaser solution through refinement and can significantly lower the Rs from 0.26/0.33 to 0.22/0.30. I appreciate any advice on how best to proceed. I am using 1.8.2-1472 if that matters. Thanks, Heather

2 3

Postdoctoral Researcher Opportunity in the application of free-electron lasers to structural biology.
by Edward Snell 06 Sep '13

06 Sep '13

Postdoctoral Researcher in application of free-electron lasers to structural biology. Open from Sept 2013 until filled. Employer: Hauptman Woodward Medical Research Institute (Position is situated in Germany) Outline of Position: This position is supported by a new NSF grant devoted to the application of free-electron X-ray lasers to structural biology. The position will be based in Hamburg, Germany at DESY CFEL, but is supported by a grant at SUNY Buffalo. There will be time for research collaborations in addition to support duties. The ideal candidate will hold a PhD in experimental Biophysics or similar. Major Responsibilities: 1) Application of X-ray free electron laser to structural biology and development of sample-delivery devices. 2) International travel to annual meetings being held in the U.S. 3) Collaboration with partner institutions and labs in the U.S. 4) Interact via web conferencing with the principal investigator and scientific director of the project Please send resume and cover letter to: Jill Szczesek Director of Operations and Academic Affairs Hauptman Woodward Medical Research Institute 700 Ellicott Street Buffalo, New York 14203 phone: 716-898-8597 email: jszczesek(a)hwi.buffalo.edu<mailto:[email protected]> Edward Snell Ph.D. Assistant Prof. Department of Structural Biology, SUNY Buffalo, Senior Scientist, Hauptman-Woodward Medical Research Institute 700 Ellicott Street, Buffalo, NY 14203-1102 Phone: (716) 898 8631 Fax: (716) 898 8660 Skype: eddie.snell Email: esnell(a)hwi.buffalo.edu Telepathy: 42.2 GHz Heisenberg was probably here!

1 0

PDBTools and TLS
by Mark Saper 03 Sep '13

03 Sep '13

Hi, I couldn't find the answers to these questions in the documentation. 1. If I am refining TLS and individual isotropic ADPs, does phenix.refine derive iso-ADP from the ANISOU records presently in the file, or does it use the iso-ADP from the ATOM record and recombine it with the TLS values? 2. Consequently if I reset the B's for a range of residues on the ATOM cards only, will they be used rather than the ANISOU record to derive the ADP? Is it better to use PDBTools, specify the iso-ADP and also convert to ANISOU? I am doing this for only a selection of the residues. 3. Should phenix.refine input files retain the header lines containing the previously cycle TLS parameters? If so PDB Tools doesn't save them. PDB Editor does. Which is the preferred tool? 4. If one explicitly changes atom ADPs with Coot using Measures>Residue info... the output file reflects the change only in the ATOM lines, but the ANISOU line retains the previous 6 parameters. It seems as if coot should also change the ANISOU to reflect anisou (last 3 parameters=0). Comments or answers? Many thanks in advance! -Mark _______________________________________________ Mark A. Saper, Ph.D. Department of Biological Chemistry, University of Michigan Medical School 3040 Chemistry Building | saper(a)umich.edu | +1 (734) 764-3353

2 1

Error determining reference matches
by Dan McNamara 31 Aug '13

31 Aug '13

Hi all, I am encountering a strange crash when running phenix.refine through the command line with reference model restraints turned on. The references point to two different PDB files, one labeled as chain A and one labeled as chain B. This error occurs whether I have my refinement model in P1 with 192 chains or P2(1) with 96 chains. The chains are A-EZ (192) or A-BH (96). It appears to fail to align the reference models to the sequences in the refinement model. This error does not occur with other smaller target structures under 25 chains and reference models used with the same installation of phenix. I am hoping for any advice on why this might be happening or how I might get around it. ================== Extract refinement strategy and selections ================= Refinement flags and selection counts: individual_sites = True (401472 atoms) torsion_angles = False (0 atoms) rigid_body = True (401472 atoms in 192 groups) individual_adp = False (iso = 0 aniso = 0) group_adp = True (201984 atoms in 25824 groups) tls = False (0 atoms in 0 groups) occupancies = False (0 atoms) group_anomalous = False n_use = 401472 n_use_u_iso = 401472 n_use_u_aniso = 0 n_grad_site = 0 n_grad_u_iso = 0 n_grad_u_aniso = 0 n_grad_occupancy = 0 n_grad_fp = 0 n_grad_fdp = 0 total number of scatterers = 401472 *** Adding Reference Model Restraints *** determining reference matches automatically... Traceback (most recent call last): File "/auto_nfs/joule2/programs/phenix/phenix-installer-dev-1457/phenix-dev-1457/build/intel-linux-2.6-x86_64/../../phenix/phenix/command_line/refine.py", line 11, in <module> command_line.run(command_name="phenix.refine", args=sys.argv[1:]) File "/auto_nfs/joule2/programs/phenix/phenix-installer-dev-1457/phenix-dev-1457/phenix/phenix/refinement/command_line.py", line 92, in run master_params=customized_master_params) File "/auto_nfs/joule2/programs/phenix/phenix-installer-dev-1457/phenix-dev-1457/phenix/phenix/refinement/driver.py", line 501, in __init__ log=self.log) File "/auto_nfs/joule2/programs/phenix/phenix-installer-dev-1457/phenix-dev-1457/cctbx_project/mmtbx/torsion_restraints/reference_model.py", line 147, in __init__ self.get_reference_dihedral_proxies() File "/auto_nfs/joule2/programs/phenix/phenix-installer-dev-1457/phenix-dev-1457/cctbx_project/mmtbx/torsion_restraints/reference_model.py", line 460, in get_reference_dihedral_proxies log=self.log) File "/auto_nfs/joule2/programs/phenix/phenix-installer-dev-1457/phenix-dev-1457/cctbx_project/mmtbx/torsion_restraints/reference_model.py", line 323, in process_reference_groups moving_chain = mod_h) File "/auto_nfs/joule2/programs/phenix/phenix-installer-dev-1457/phenix-dev-1457/cctbx_project/mmtbx/torsion_restraints/utils.py", line 426, in _ssm_align ssm_alignment = ccp4io_adaptbx.SSMAlignment.residue_groups(match=ssm) File "/auto_nfs/joule2/programs/phenix/phenix-installer-dev-1457/phenix-dev-1457/ccp4io_adaptbx/__init__.py", line 215, in residue_groups return cls( match = match, indexer = indexer ) File "/auto_nfs/joule2/programs/phenix/phenix-installer-dev-1457/phenix-dev-1457/ccp4io_adaptbx/__init__.py", line 176, in __init__ self.pairs.append( ( get( f, indexer1 ), get( s, indexer2 ) ) ) File "/auto_nfs/joule2/programs/phenix/phenix-installer-dev-1457/phenix-dev-1457/ccp4io_adaptbx/__init__.py", line 173, in get assert identifier in indexer, "Id %s missing" % str( identifier ) AssertionError: Id ('A', 1, ' ') missing Best, Dan

3 2

coot and mtz interpretation
by Heather L Condurso 30 Aug '13

30 Aug '13

I'm having an issue that when I launch coot from the phenix refine gui it loads the pdb and mtz fine, but the FoFc map colors are green and royal blue. When I open coot first and then load the pdb and mtz files, the FoFc map colors are green and red, but the blobs that were green in the phenix loaded maps are now red and what was royal blue is now green. Has anyone else had this issue? I am running a mac with OS X 10.6.8 and coot 0.6.1 and phenix 1.8.2-1309. I have an identical mac running all the same versions and everything loads green and red as expected. Is there a parameter file somewhere that tells coot how to display the phenix maps that may provide a clue as to what is going on? I appreciate any suggestions, Heather

3 4

a question on NAG-ASN cif file
by fn1＠rice.edu 29 Aug '13

29 Aug '13

Hi Nigel, I tried your nag_asn.cif file. I did not include hydrogen in the refinement, so i always get the error message that NAG-ASN could not be applied. So i remark the angle definition that contains hydrogen and the same for the plane definition, as follows, #NAG-ASN 1 C1 2 ND2 2 HD2 119.000 3.000 #NAG-ASN plane1 2 HD21 .020 by doing this, the program could run through. However, when i check the geometry output .geo file, only the added plane information is seen, no chirality of C1 in NAG is seen. Did i do something wrong? Thank you! Fengyun

2 1

a question on NAG-ASN cif file
by fn1＠rice.edu 29 Aug '13

29 Aug '13

Hi everyone, I am refining a glycoprotein model, and I have applied NAG-ASN link to the ASN. But the beta-conformation of NAG could not be retained after refinement for some sites. I read the cif file and find that there are only angle definitions for NAG-ASN. The dihedral and charility information are missing. Is there a way that I could retain the charility of C1 of NAG? Thank you! Fengyun

3 3

ALS Call for General User Proposals - DEADLINE SEPTEMBER 4 , 2013
by Banumathi Sankaran 28 Aug '13

28 Aug '13

> > The deadline for Jan/July 2014 Collaborative > Crystallography proposals will be *Sep 4, 2013. * > > ---------------------------------------------------------------------------------------- > Through the Collaborative Crystallography Program (CC) at the > Advanced Light Source (ALS), scientists can send protein crystals > to Berkeley Center for Structural Biology (BCSB) staff researchers > for data collection and analysis. The CC Program can provide a > number of benefits to researchers: > > * Obtain high quality data and analysis through collaborating with > expert beamline > researchers; > * Rapid turn around on projects; and > * Reduced travel costs. > > To apply, please submit a proposal through the ALS General User > proposal review process for beamtime allocation. Proposals are > reviewed and ranked by the Proposal Study Panel, and beamtime is > allocated accordingly. BCSB staff schedule the CC projects on > Beamlines 5.0.1 and 5.0.2 to fit into the available resources. Only > non-proprietary projects will be accepted. As a condition of > participation, BCSB staff researchers who participate in data > collection and/or analysis must be appropriately acknowledged - > typically being included as authors on publications and in PDB > depositions. Please consult the website for additional information at: > > http://bcsb.als.lbl.gov/wiki/index.php/Collaborative_Crystallography > > ----------------------------------------------------------------------------------------- > > > How To Apply: > > Please follow the instructions for proposal submission at: > http://www-als.lbl.gov/index.php/user-information/user-guide/58.html > Scroll down to "*Structural Biology beamlines (includes protein SAXS)*" > and click on "New Proposal." Enter your proposal information. > > > > Regards, > Banumathi Sankaran >

1 0

processor usage controlin DEN
by miyatake 25 Aug '13

25 Aug '13

Dear phenixbb, Hello, I run DEN refinements using GUI (dev-1439). I wonder whether I can control the number of the processor used during the DEN refinement. I know that we can use nproc in command line, but I'd like use it in GUI. Best regards, H. Miyatake

2 4