- phenixbb - phenix-online.org

.cif file has 'UNK' auth_asym_id
by Kevin M Jude 13 Mar '25

13 Mar '25

I’ve finished refining a structure with three protein chains A, B, C. The pdb file looks ‘normal’ to me, but when I inspect the .cif file written by phenix, the auth_asym_id for chains B and C is ‘UNK’. label_asym_id is correct for all chains. I’m not really sure what the difference is between the auth_ and label_ fields. When I try to perform actions on the .cif file, I get duplicate atom label errors. Here’s a few example lines from the .pdb and .cif files, where auth_asym_id is field 6 and label_asym_id is field 16 ATOM 460 OXT PRO A 59 5.272 55.689 31.481 1.00 52.63 O ANISOU 460 OXT PRO A 59 6541 6212 7244 1448 1260 96 O TER ATOM 461 N ALA B 2 39.292 61.974 39.403 1.00 67.81 N ANISOU 461 N ALA B 2 7118 8729 9916 -1711 -388 2066 N ATOM 460 OXT . PRO A 59 ? 5.27169 55.68852 31.48123 1.000 52.63052 O ? A ? 58 1 ATOM 461 N . ALA UNK 2 ? 39.29207 61.97430 39.40271 1.000 67.80544 N ? B ? 1 1 I’m able to convert the pdb file to a usable cif file using gemmi but wanted to report this weird behavior with phenix 1.21.2_5419. -- Kevin Jude, PhD Structural Biology Research Specialist, Garcia Lab Howard Hughes Medical Institute Stanford University School of Medicine Beckman B177, 279 Campus Drive, Stanford CA 94305

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Pdb validation report via phenix
by Stachowski, Tim 12 Mar '25

12 Mar '25

I’ve always found the phenix.get_pdb_validation tool to be super helpful to gauge where my refinements are relative to the PDB, especially since I work mainly through the command line. But sometime around late last year, the R-free metric stopped being calculated (probably related to “EDS: FAILED”). Is there a way to bring this part of the tool back – or does anyone have a work around they can share? I’m running the command like: phenix.get_pdb_validation_report final-coot-3_refine_001.reflections.cif final-coot-3_refine_001.cif with version: phenix-2.0rc1-5599 Thanks Tim -- Tim Stachowski, PhD St. Jude Children’s Research Hospital ________________________________ Email Disclaimer: www.stjude.org/emaildisclaimer Consultation Disclaimer: www.stjude.org/consultationdisclaimer

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Refining the structure of Ribosome and the system crash
by Rajnandani Kashyap 12 Mar '25

12 Mar '25

Hello Everyone I am trying to run jobs in phenix (real space refinement alignment with the other modelling jobs), but the system always crashes, and refinement doesn't complete. This is the structure of ribosome, and I am wondering what to do to get through the refinement. Is there any specific parameters I should be using. I tried to change the processors to 15 for a 20-processor computer. Let me know. Thanks in advance. FYI: There is no error message in the log. Best, Rajnandani ---------------------------------------------------------------------- Rajnandani Kashyap, Ph.D. Postdoctoral Fellow Department of Biochemistry and Molecular Biology Saint Louis University, Antony Lab 1205 Carr Lane, DRC 451 St. Louis, MO 63104 https://orcid.org/0000-0002-9141-1168 -----------------------------------------------------------------------

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Trouble with GTP/GDP refinement.
by DIEGO ORTIZ DE ELGUEA LOPEZ DE DICASTILLO 07 Mar '25

07 Mar '25

Dear phenixbb: I'm working with a GTP binding protein and have had some problems running phenix_refine. In my unit cell there are two molecules one with GDP and one with GTP, which I added in Coot(0.9.8). When refining the following error message pops-up : "Fatal problems interpreting model file: Number of atoms with unknown nonbonded energy type symbols:4 Please edit the model file to resolve the problems and/or supply a CIF file with matching restraint definitions, along with apply_cif_modifications and apply_cif_link parameter definitions if necessary". Checking the log file I found that the problem seems to be hydrogen atoms from these ligands Number of atoms with unknown nonbonded energy type symbols: 4 "HETATM 6499 H5' GTP A 501 .*. H " "HETATM 6502 H5'' GTP A 501 .*. H " "HETATM12939 H5' GDP B 501 .*. H " "HETATM12940 H5'' GDP B 501 .*. H " Including the corresponding .CIF files (dowloaded from PDB) did not solve the problem and the same error popped. Since I'm in the initial stages of the refinement I'm running phenix with bindividuals. Could anybody save my day giving me some light into this issue? Cheers, Diego

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Ion placement (anomalous) + occupancy refinement
by miha.pavsic＠fkkt.uni-lj.si 06 Mar '25

06 Mar '25

Hi everyone, I have a dataset from a protein that contains 2 Ca2+ binding sites. The Ca2+ loaded protein was crystallized in the presence of Tb3+ which at one site mostly replaced Ca2+, however at the other site the Tb3+/Ca2+ ratio appears to be much lower (judging from anomalous map; data collected at 1.3 Å wavelength, MR for phasing). The occupancy sum of Tb3+ and Ca2+ at each of the two sites is strongly believed to be 1. While I am aware of the ion placement option in phenix.refine, I am not so sure how to refine the partial occupancies using anomalous data, if possible. Many thanks for any hints, Miha

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AKM in Phenix
by lucas.santosouza＠outlook.com 06 Mar '25

06 Mar '25

Hi everyone, Is there still support for the generation of Average Kick Maps in Phenix? I am using both versions 1.21.2-5419 and the nightly build 2.0rc1-5555. I added kicked=True to the maps.params, but phenix.maps gives me "Unused parameter definitions: maps.map_coefficients.kicked (file "maps.params", line 53)". I also cannot see the "Kicked map" check box in the Create Maps GUI. Cheers, Lucas

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Refine partially occupied ligand in active site containing chloride ions
by Stephen.carr＠rc-harwell.ac.uk 06 Mar '25

06 Mar '25

Dear phenix bb, I am trying to refine a ligand in the active site of my protein where the ligand occupancy is ~50%. The empty active site contains two chloride ions and the residual density from these ions is very prominent when the model is refined with the ligand alone. I would like to refine the model with both the ligand and chloride ions present and have been trying to do this with altLoc flags but so far with no luck. I'm assuming that since the Cl ions more-or-less directly overlay atoms from the ligand positional refinement keeps pushing them out of the density. I'm sure there is a simple way to get around this and I would be grateful for any suggestions. Best wishes, Steve Dr Stephen Carr Research Complex at Harwell (RCaH) Rutherford Appleton Laboratory Harwell Oxford Didcot Oxon OX11 0FA United Kingdom Email stephen.carr(a)rc-harwell.ac.uk tel 01235 567717 This email and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorized recipient of the addressee, please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to this email. Any views or opinions presented are solely those of the author and do not necessarily represent those of the Research Complex at Harwell. There is no guarantee that this email or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message. We use an electronic filing system. Please send electronic versions of documents, unless paper is specifically requested. This email may have a protective marking, for an explanation, please see: http://www.mrc.ac.uk/About/informationandstandards/documentmarking/index.htm.

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Program crash
by F.Xavier Gomis-Rüth 05 Mar '25

05 Mar '25

Dear all, I recently upgraded my MacOS to Sequoia 15.3.1 and found that previous phenix jobs that ran without problem suddenly crashed with the installation (phenix-1-21.2-5419) I had since August 2024. So I installed the latest on-built (phenix-2.0rc-5617) but it nonetheless crashed with the message below. Any help would be greatly appreciated. Best, Xavier XGRMAC:cyc3 > Could not import the compiled Python-sander interface.Traceback (most recent call last): File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/phenix/command_line/real_space_refine.py", line 8, in <module> run_program(real_space_refine.Program) File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/iotbx/cli_parser.py", line 980, in run_program task.run() File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/phenix/programs/real_space_refine.py", line 206, in run self.rsr_result = rsr_wrappers.run_real_space_refine( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/phenix/refinement/rsr/wrappers.py", line 52, in __init__ self._refined = macro_cycle_real_space.run( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/phenix/refinement/macro_cycle_real_space.py", line 306, in __init__ self.caller(self.refine_xyz) File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/phenix/refinement/macro_cycle_real_space.py", line 321, in caller func() File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/phenix/refinement/macro_cycle_real_space.py", line 704, in refine_xyz self.minimization_ncs() File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/phenix/refinement/macro_cycle_real_space.py", line 794, in minimization_ncs weight = real_space_weight.run( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/mmtbx/refinement/real_space/weight.py", line 84, in __init__ ro.refine( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/mmtbx/refinement/real_space/individual_sites.py", line 394, in refine real_space_result = refinery( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/mmtbx/refinement/real_space/individual_sites.py", line 233, in __init__ refiner.refine( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/mmtbx/refinement/real_space/individual_sites.py", line 126, in refine minimized = mmtbx.refinement.minimization_ncs_constraints.lbfgs( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/mmtbx/refinement/minimization_ncs_constraints.py", line 424, in __init__ minimizer = scitbx.lbfgs.run( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/scitbx/lbfgs/__init__.py", line 270, in run return run_c_plus_plus( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/scitbx/lbfgs/__init__.py", line 131, in run_c_plus_plus f, g = target_evaluator.compute_functional_and_gradients() File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/mmtbx/refinement/minimization_ncs_constraints.py", line 456, in compute_functional_and_gradients t,g = self.target_and_grads_object.target_and_gradients( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/mmtbx/refinement/minimization_ncs_constraints.py", line 242, in target_and_gradients t_restraints, g_restraints = restraints_target_and_grads( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/mmtbx/refinement/minimization_ncs_constraints.py", line 110, in restraints_target_and_grads ef = restraints_manager.energies_sites( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/cctbx/geometry_restraints/manager.py", line 1524, in energies_sites pair_proxies = self.pair_proxies( File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/cctbx/geometry_restraints/manager.py", line 1427, in pair_proxies check_bonded_distance_cutoff(sites_frac=sites_frac) File "/Applications/phenix-2.0rc1-5617/lib/python3.9/site-packages/cctbx/geometry_restraints/manager.py", line 1308, in check_bonded_distance_cutoff raise RuntimeError(msg) RuntimeError: Bond distance > max_reasonable_bond_distance: 59.7151 > 50: distance: 0 - 1: 15.382 distance: 1 - 2: 14.133 distance: 1 - 3: 15.077 distance: 4 - 5: 11.010 distance: 5 - 6: 5.064 distance: 5 - 8: 12.166 distance: 6 - 7: 9.252 distance: 6 - 15: 4.656 distance: 8 - 9: 6.568 distance: 9 - 10: 41.112 distance: 9 - 11: 19.959 distance: 10 - 12: 4.365 distance: 11 - 13: 12.611 distance: 12 - 14: 28.654 distance: 13 - 14: 25.314 distance: 15 - 16: 7.291 distance: 16 - 17: 12.341 distance: 16 - 19: 4.354 distance: 17 - 18: 11.820 distance: 17 - 26: 9.661 distance: 19 - 20: 7.438 distance: 20 - 21: 17.074 distance: 20 - 22: 19.126 distance: 21 - 23: 7.637 distance: 22 - 24: 3.434 distance: 23 - 25: 24.169 distance: 24 - 25: 8.875 distance: 26 - 27: 10.037 distance: 27 - 28: 9.377 distance: 27 - 30: 12.844 distance: 28 - 29: 12.437 distance: 28 - 34: 22.926 distance: 30 - 31: 46.409 distance: 31 - 32: 6.849 distance: 31 - 33: 21.459 distance: 34 - 35: 12.375 distance: 34 - 40: 15.635 distance: 35 - 36: 10.511 distance: 35 - 38: 12.461 distance: 36 - 37: 11.525 distance: 36 - 41: 15.668 distance: 38 - 39: 9.083 distance: 39 - 40: 10.922 distance: 41 - 42: 15.925 distance: 42 - 43: 26.537 distance: 42 - 45: 20.600 distance: 43 - 44: 14.038 distance: 43 - 48: 40.043 distance: 45 - 46: 18.721 distance: 45 - 47: 12.152 distance: 48 - 49: 19.936 distance: 49 - 50: 9.210 distance: 49 - 52: 4.170 distance: 50 - 51: 6.051 distance: 50 - 56: 10.707 distance: 52 - 53: 13.486 distance: 53 - 54: 25.122 distance: 53 - 55: 30.977 distance: 56 - 57: 24.676 distance: 57 - 58: 6.469 distance: 57 - 60: 24.810 distance: 58 - 59: 19.649 distance: 58 - 65: 16.713 distance: 60 - 61: 19.749 distance: 61 - 62: 27.563 distance: 62 - 63: 31.258 distance: 63 - 64: 39.081 distance: 65 - 66: 17.034 distance: 66 - 67: 13.877 distance: 66 - 69: 30.087 distance: 67 - 68: 30.739 distance: 67 - 70: 22.852 distance: 70 - 71: 17.537 distance: 71 - 72: 19.009 distance: 71 - 74: 23.249 distance: 72 - 73: 32.627 distance: 72 - 81: 23.614 distance: 74 - 75: 30.150 distance: 75 - 76: 11.440 distance: 75 - 77: 13.841 distance: 76 - 78: 23.906 distance: 77 - 79: 27.669 distance: 78 - 80: 29.196 distance: 79 - 80: 27.009 --

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Cryo_fit installation
by omar.debei＠unipr.it 28 Feb '25

28 Feb '25

Hi everyone, I was wondering if you could help me with installing cryo_fit on an Ubuntu machine. I followed the instructions here for the cryo_fit installation. Then, I tried to follow this guide to install gromacs_cryo_fit. However, I got stuck at the "Install using a provided script" step. Do I need to install GROMACS separately before proceeding? Any tips would be greatly appreciated! Many thanks, Omar

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IBA2025 - May 5&6 2025 - Cambridge MA
by Chip Lesburg 24 Feb '25

24 Feb '25

The Industrial Biostructures America conference will take place on May 5 & 6, 2025 at the MassBioHub in Cambridge MA. The conference was launched in 2018 to bring the industry-based structural biology community together for two days of presentations and networking. This is a great place for industrial structural biologists, as well as those who are industry-curious. The conference will feature keynote presentations by: * Dr. Stephen K. Burley, Director RCSB Protein Data Bank and Rutgers University Professor * Dr. James Fraser, Professor and Chair Department of Bioengineering and Therapeutics Sciences at UCSF * Dr. Stephen Harrison, Professor Harvard Medical School/Investigator Howard Hughes Medical Institute * Dr. Mark Murcko, Founding CSO/Board Member at Dewpoint Therapeutics and Relay Therapeutics Conference information is available at https://industrialbiostructuresamerica.org along with guidelines for submitting abstracts for scientific presentations during the conference. Scientific sessions will cover the following topics: * Structural Biology of Targeted Protein Degradation: Glues, TCs & DUBs * Developing Fragments to Drugs: Challenges & Victories * Molecular Dynamics and Allostery - Bridging Experimental and Computational Drug Discovery * Membrane Protein Structure Guided Design * CryoEM Synergies with Molecular Modeling and Computational Models * Biologics (Antibody Design & ADCs) * AI/ML in Structural Biology and Drug Discovery * Hot Topics (SBDD, Kinases, RNA) The abstract deadline is April 1. Space is limited so if you're interested, please register soon. Contact us at iba(a)proteros.com<mailto:[email protected]> for information regarding Exhibitor and Sponsor opportunities [cid:logo_c70edd4a-e7f0-4d54-be6f-d03f53f0c961.png] Charles Lesburg Vice President, Structural Biology odysseytx.com<https://protect.checkpoint.com/v2/___https:/odysseytx.com/___.YzJ1Om9keXNzZ…> This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. ODYSSEY THERAPEUTICS, INC. ("ODYSSEY THERAPEUTICS") reserves the right to monitor all e-mail communications through its networks. ODYSSEY THERAPEUTICS cannot be committed by this e-mail or warrant the accuracy or validity of any information presented. Any views expressed in this message are those of the individual sender.

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