April 2024 - phenixbb - phenix-online.org

RapiData at SSRL 2024
by Smith, Clyde 09 Jan '25

09 Jan '25

Hi everyone, Applications are now open for the 2024 edition of RapiData at SSRL. RapiData is a practical course in macromolecular X-ray diffraction data collection, data processing and structure solution. The aim of the RapiData course is to educate and train young scientists in data collection and processing methods at synchrotron beamlines, using state-of-the-art software and instrumentation. The course will be held at the Stanford Synchrotron Radiation Lightsource (SSRL) located on the SLAC National Accelerator Laboratory campus in Menlo Park, CA, from April 29 to May 4, 2024. The course will comprise hands-on experiments at the SSRL beamlines, software tutorials, and lectures on the following topics: Specimen preparation, Data collection strategies, X-ray light sources, X-ray detectors, Data reduction, Structure solution by MAD, SAD and Molecular Replacement, Complementary methods (spectroscopy and small angle scattering) Please visit http://smb.slac.stanford.edu/news/rapidata/rapidata-2024/ and use the links on the "Application and Registration" page to apply for the course. The application deadline is January 31, 2024. Successful applicants will be notified early in February 2024 and invited to register and book accommodation at SLAC Stanford Guesthouse at that time. A limited amount of support funding may be available. Please direct questions to Silvia Russi (srussi(a)slac.stanford.edu) or Clyde Smith (csmith(a)slac.stanford.edu).

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Re: [phenixbb] red blobs (Andrea Smith)
by Kay Diederichs 31 Oct '24

31 Oct '24

Hi Andrea, in your case, phenix.refine seems to fill bulk solvent into volumes that are not actually filled by solvent. It might help to optimize the mask, see https://phenix-online.org/documentation/reference/refinement.html#bulk-solv… "6. Mask parameters". Best, Kay -- Kay Diederichs http://strucbio.biologie.uni-konstanz.de email: Kay.Diederichs(a)uni-konstanz.de Tel +49 7531 88 4049 Fachbereich Biologie, Universität Konstanz, Box M647, D-78457 Konstanz This e-mail is digitally signed. If your e-mail client does not have the necessary capabilities, just ignore the attached signature "smime.p7s".

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Ordered solvent in phenix.refine
by Oliver H. Weiergräber 11 Sep '24

11 Sep '24

Hello, after switching from version 1.20 to 1.21, I noticed that the updated list of waters generated by the ordered_solvent option in phenix.refine is no longer numbered sequentially; it seems a final re-numbering step is now skipped. Is this intentional? Of course it can be advantageous to keep waters from changing their numbers, e.g. if they are part of occupancy groups. On a related note, is there a mechanism to protect certain "important" waters from being deleted while all the rest is updated as usual? One obvious option would be a dedicated chain ID, but afaik phenix.refine accepts a chain ID for output but not for input waters ... Best regards, Oliver ================================================== Prof. Oliver H. Weiergräber Institute of Biological Information Processing IBI-7: Structural Biochemistry Forschungszentrum Jülich 52425 Jülich, Germany Tel.: +49 2461 61-2028 Fax: +49 2461 61-9540 ==================================================

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Hardware migration
by Billy Poon 19 Jun '24

19 Jun '24

Hi everyone, We are in the process of migrating these bulletin boards to new hardware over the next few weeks. I will make another post once the migration is completed. Nothing will be changed until then. Thanks! -- Billy K. Poon Research Scientist, Molecular Biophysics and Integrated Bioimaging Lawrence Berkeley National Laboratory 1 Cyclotron Road, M/S 33R0345 Berkeley, CA 94720 Fax: (510) 486-5909 Web: https://phenix-online.org

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ccp4 thread: "what happened to Molprobity"
by Pavel Afonine 01 May '24

01 May '24

Hi All, I hope someone from Molprobity end reads CCP4 mailing list where people report issues with Molprobity (server and from within Phenix). Just in case this needs someone's attention. Pavel

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on the criteria for outliers, phenix.molprobity and wwPDB validation
by Jorge Iulek 29 Apr '24

29 Apr '24

Hi all, I had already noticed that outliers spotted by phenix with its validation tool, with the nice feature to carry one straight to the "suspicious" residue in a coot session for visual inspection, differs a bit from what comes spotted from wwPDB validation, generally the latter spotting some few more residues. To one current structure, which at low resolution, I notice there is a bit larger difference between the number of spotted residues. I see from wwPDB validation, molprobity is also used to spot outliers for many of the analyses. I see the current molprobity version used is 4.02b-467, but I could not yet devise the molprobity version used by phenix. Of course, there would also be the "library" used in each case to spot the outliers. Maybe someone ever listed what is considered in each case, and their differences, or a link to that is welcome for me. What would be the best criteria for spotting is of course a good discussion. But a superficial question I would make is if there is a way to make phenix.molprobity output to resemble the one from wwPDB validation, at least the ones accounted by molprobity? Jorge

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Phenix resolve_cryo_em with local resolution
by Reza Khayat 29 Apr '24

29 Apr '24

Hi, Is it possible to run resolve_cryo_em and have it consider the local resolution of the two half maps in the final map? I have a 3.7Angstrom map were certain domains, too small for local refinement with single particle analysis, are smeared out in the resolve_cryo_em map. Their densities are stronger when I low pass filter the original maps. The adjust_local_resolution_coloring = True option seems to be what I need; however, including this option in the command line results in: Please run this program with the --show-defaults option to see what parameters are available. PHIL parameters in files should be fully specified (e.g. "output.overwrite" instead of just "overwrite") The command line I use is: phenix.resolve_cryo_em map_file_name=Class001_full_box_40.ccp4 half_map_file_name_1=Class001_half1_box_40.ccp4 half_map_file_name_2=Class001_half2_box_40.ccp4 resolution=4.0 dm_resolution=3.5 cycles=1 box_before_analysis=False density_modify_unsharpened_maps=True nproc=16 force_nproc=True model_1=Class001.pdb seq_file=Class001.fasta ncs_copies=1 output_directory="Class001_local" adjust_local_resolution_coloring=True > Class001_local.log Any help would be appreciated. Thanks. Best wishes, Reza Reza Khayat, PhD City College of New York Associate Professor Department of Chemistry and Biochemistry Co-Director NIH G-RISE program

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chain name lentgh
by Roberto Marabini 19 Apr '24

19 Apr '24

Hi, We are using phenix version 1.20.1-4487. The protein complex we are processing has more than 100 chains. For this complex we would like to use chain names longer than 2 characters but I see that phenix output truncates the names to the last two characters. Is there any way to avoid this constraint, that is, can we get output files with longer chain names? thanks for the help Roberto

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change sigma for an already restrained bond
by Jorge Iulek 19 Apr '24

19 Apr '24

Dear all, I would like to change the sigma value for an already restrained bond. I enter for phenix.refine: " bond { action = add delete *change atom_selection_1 = chain D and resid 493 and name CA atom_selection_2 = chain D and resid 493 and name CB symmetry_operation = None distance_ideal = 1.532 sigma = 1.02e-2 slack = None limit = -1.0 top_out = False } " In the log I get: " ... Custom bonds: bond: atom 1: "ATOM 14355 CA ALA D 493 .*. C " atom 2: "ATOM 14358 CB ALA D 493 .*. C " symmetry operation: x,y,z distance_model: 1.511 distance_ideal: 1.532 ideal - model: 0.021 slack: 0.000 delta_slack: 0.021 sigma: 0.0102 Total number of added/changed bonds: 1 ... " But in the .geo file I read: " User supplied restraints: 1 Sorted by residual: bond pdb=" CA ALA D 493 " pdb=" CB ALA D 493 " ideal model delta sigma weight residual 1.532 1.511 0.022 1.28e-02 6.10e+03 2.85e+00 " 1.28e-02 is the default value. On the other hand, sigma changes for angles and dihedrals seem to work as expected (the intended values are echoed to the .geo file). To add up, if a bond is *added*, the value is in the .geo file. I observe this for both 1.20.1-4487 1.21-5207 versions. So, in short, should I be allowed to *change the sigma* for a specific *bond*? How should I do it? Thanks Jorge

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iNEXT/3D-Bioinfo AI in structural biology workshop announcement
by Jon Agirre 15 Apr '24

15 Apr '24

Dear all, It is our pleasure to announce the joint iNEXT-Discovery and 3D-Bioinfo workshop on "AI advances in structural biology and drug discovery", to be held in Grenoble on 13-14 May 2024. The rapid advancements in Artificial Intelligence (AI) and Machine Learning (ML) have opened up new horizons in the field of Structural Biology and Drug Discovery. This workshop is addressed to scientists in industry and academia, and aims to bridge the gap between the recent developments in AI technologies and experimental approaches in translational research. From understanding biological structures to accelerating the drug discovery processes, participants will gain insights into the latest AI models, as well as high throughput experimental techniques. Through a series of invited and selected talks (abstract submission will remain open until 25 April 2024), attendees will explore the power of combining AI and experimental approaches in translational research. Abstracts will be considered for oral and poster presentations. Please register and send your abstract before 25 April 2024. Website: https://instruct-eric.org/events/ai-approaches-in-structural-biology-and-dr… Registration fee: £50 (includes catering) Venue: EPN campus, Grenoble, France. Dates: 13-14 May 2024 Best regards, Jon Agirre, on behalf of the organising committee: Jose A. Marquez (Instruct-ERIC), Magalie Matthieu (Sanofi-Aventis), Rebecca Thompson (ThermoFisher), Max Nanao (ESRF), Carlos Oscar Sorzano (Instruct-ERIC), Jon Agirre (Instruct-ERIC/3D-Bioinfo liaison), Sameer Velankar (EMBL-EBI, 3D-Bioinfo), Evangelia Chrysina (ICB-NHRF, Greece). -- Dr Jon Agirre Royal Society University Research Fellow (assistant professor) Main editor at Acta Crystallographica Section F: Structural Biology Communications CCP4 WG2 co-chair | instruct-ERIC representative @ 3D-Bioinfo SC (Elixir) York Structural Biology Laboratory, Department of Chemistry University of York, Heslington, YO10 5DD, York, UK

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