August 2020 - phenixbb - phenix-online.org

RapiData 2020 applications open
by Smith, Clyde 16 Nov '21

16 Nov '21

Applications are now open for the 2020 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 in sunny California at the Stanford Synchrotron Radiation Lightsource (SSRL) located on the SLAC National Accelerator Laboratory campus in Menlo Park, CA, from March 30 - April 4 2020. Course organizers for 2020 are Silvia Russi, Clyde Smith and Jeney Wierman. 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-2020/ and use the links on the "registration" page to apply for the course. The application deadline is November 10 2019. Successful applicants will be notified shortly thereafter, and invited to register and book accommodation at the SLAC Guesthouse at that time. A limited amount of travel support funding may be available. Please direct questions to Silvia Russi (srussi(a)slac.stanford.edu), Jeney Wierman (jwierman(a)slac.stanford.edu) or Clyde Smith (csmith(a)slac.stanford.edu).

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group on special position
by Arthur Glasfeld 04 Sep '20

04 Sep '20

I’ve run into a situation where I think I have a phosphate sitting on a 3-fold axis, where the P to O1 bond lies on the axis and the atoms O2, O3 and O4 are in symmetry-related positions. The data go to 1.6 Å, so it looks pretty convincing. I’m refining this in Phenix and have tried some tricks with occupancy - fixing the atoms at 0.33, but I get a lot of positive density in the Fo-Fc map and large B-factors. I’ve looked around but am not finding ideas on how to model this correctly in my structure file - the references I find are for monoatomic ions. Any advice would be welcome. Thanks, Arthur ***************** Arthur Glasfeld Reed College Portland, OR 97202 Office: (503)517-7679

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Phenix User Workshop, 15th and 16th of September
by Paul Adams 31 Aug '20

31 Aug '20

Dear Colleagues, The Phenix developers will be holding an online Phenix User Workshop on the 15th and 16th of September at 8am-12pm PDT. These times will work best for researchers in North and South America, Europe and Africa. We plan to hold a future workshop at a time better suited to researchers in Asia and Australasia. The format of the workshop will be demos of the use of Phenix programs combined with slides to explain the theory. We expect an interactive meeting where attendees can ask questions for the Phenix team to answer. The workshop will cover aspects of crystallography and cryo-EM in Phenix, with the final emphasis based on the applicants’ research interests. To apply, send email to workshops(a)phenix-online.org with a short paragraph about your interests. We will make every effort to accommodate all applicants, but may need to defer some requests to a future workshop if demand is high. We are hoping this workshop will be a success, in which case we plan to host more in the future. Cheers, The Phenix Developer Team -- Paul Adams Division Director, Molecular Biophysics & Integrated Bioimaging, LBL (http://biosciences.lbl.gov/divisions/mbib) Principal Investigator, Computational Crystallography Initiative, LBL (http://cci.lbl.gov) Vice President for Technology, the Joint BioEnergy Institute (http://www.jbei.org) Principal Investigator, ALS-ENABLE, Advanced Light Source (http://als-enable.lbl.gov) Division Deputy for Biosciences, Advanced Light Source (https://als.lbl.gov) Laboratory Research Manager, ENIGMA Science Focus Area (http://enigma.lbl.gov) Adjunct Professor, Department of Bioengineering, U.C. Berkeley (http://bioeng.berkeley.edu) Adjunct Professor, Comparative Biochemistry, U.C. Berkeley (http://compbiochem.berkeley.edu) Building 33, Room 250 Building 978, Room 4126 Building 977, Room 180C Tel: 1-510-486-4225 http://cci.lbl.gov/paul Lawrence Berkeley Laboratory 1 Cyclotron Road BLDG 33R0345 Berkeley, CA 94720, USA. Executive Assistant: Ashley Dawn [ ashleydawn(a)lbl.gov ][ 1-510-486-5455 ] --

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phenix.resolve_cryo_em
by Reza Khayat 25 Aug '20

25 Aug '20

?Hi, I'm running into a clipping issue with phenix.resolve_cryo_em. The program seems to be improving the map; however, portions of the map get clipped. Any suggestion would be appreciated. Best wishes, Reza Reza Khayat, PhD Associate Professor City College of New York Department of Chemistry and Biochemistry New York, NY 10031

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MicroED Imaging Center
by Johan Hattne 24 Aug '20

24 Aug '20

Dear Structural biology community; We are delighted to announce that the National Institutes of Health is helping us establish a Biotechnology Development Research Center focused on MicroED at UCLA School of Medicine, named MicroED Imaging Center (MEDIC). The main thrust of MEDIC is for method development and research focused on MicroED. As part of community engagement, the center will host the annual MicroED course as well as an annual MicroED Summit, both of which will be staged at the UCLA School of Medicine, and open to the community on a first come first serve basis until spaces are filled. Approximately 90% of available spots will be allocated to academic attendees and 10% to industry attendees. This will be a continuation of almost 10 years of tradition of providing workshops and training to the community. Also, there is some opportunity for the community to collect data on MEDIC microscopes. There is also limited availability for one-on-one user training at the center at UCLA for microscope set up and data collection. Users and trainees will be invited based on replies to a call for proposals, which will be advertised shortly. The proposals will be reviewed by an advisory committee. Because of the COVID19 pandemic and the limitations on travel and hosting imposed by UCLA we cannot begin these activities at this stage. On a related note, UCLA School of Medicine is also running a MicroED Imaging Core which is open as a pay per use service for academia and industry. This activity is independent of the Gonen Lab and from the NIH funded research program on MicroED. Details can be found online. Kind regards Tamir Gonen and Pawel Penczek

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error while Auto sharpen
by sangeeta niranjan 19 Aug '20

19 Aug '20

Hello, I am trying to use Auto Sharpen feature of a CyoEM refined map into Phenix but the job is getting failed every time with the following error: Missing the model file: followed with model file name and location. Although it was working before but now it's showing the same error for all the auto sharpen runs including Models/PDBs. Thank you -- Sangeeta Niranjan Ph.D. Student, Lab of structural Biology Lab-6 NB National Centre for cell Science Ganeshkhind, Pune, India

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moving folders
by Thomas, Leonard M. 18 Aug '20

18 Aug '20

Hello, I know this come up every so often by my google-fu is sorely lacking to find the answer. How does one move a project folder? I have a project and not thinking things through set it up in the wrong folder. I would like to move the whole thing to another folder maintaining the project structure. Thanks, Len Leonard Thomas, Ph.D. Macromolecular Crystallography Laboratory Oklahoma COBRE in Structural Biology Price Family Foundation Institute of Structural Biology University of Oklahoma Department of Chemistry and Biochemistry Stephenson Life Sciences Research Center 101 Stephenson Parkway Norman, OK 73019-5251 Office: (405)325-1126 lmthomas(a)ou.edu<mailto:[email protected]> http://www.ou.edu/structuralbiology/cobre-core-facilities/mcl

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Phenix.Refine fix WXC has no effect
by White, Mark 17 Aug '20

17 Aug '20

Hello, I am refining a 3.5 Å structure using the latest stable version of Phenix.Refine. After switching to the latest version the Bond RMSDs exploded to ~ 0.035 Å, when using optimize wxc. Turning off Optimize and using the "Fix WXC" parameters in the GUI with increasingly smaller values had almost no effect on the final bond rmsds, which seems to explode from reasonable values in the "3_xyz" step of refinement. Am I missing something? Best regards, Mark Mark Andrew White, Ph.D. Associate Professor of Biochemistry & Molecular Biology, Manager, SCSB Macromolecular X-ray Laboratory UTMB, Galveston, TX http://xray.utmb.edu

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Phenix.refine on coordinate-optimised structures
by Joey Farrell 08 Aug '20

08 Aug '20

Hello, I am trying to design a set of input parameters that I will be passing through the phenix.refine function. The structures that I am working with have already had their X,Y, and Z orthogonal Å coordinates optimised via separate protocol. I am looking for advice on which strategies and parameter values to use with phenix.refine to improve the crystallographic R-factors of such structures while preserving their earlier optimisation in real space. I have been having some success using “strategy = tls+individual_adp+occupancies” (where tls = “chain A”, tls = “chain B”, etc.) as well as adjusting the wxu_scale value until R-work and R-free are minimised. Are there other strategies or phenix.refine functionalities that may also prove helpful with this end in mind? I believe there may be ways to further improve R-work and R-free with this software that I am not yet aware of. Thank you for your help! Best, Joey

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Phenix Real_Space_Refine and Torsion NCS restraints
by Mark A. White 04 Aug '20

04 Aug '20

Hello, Are there plans to include Torsion Angle NCS restraints in the Phenix.Real_Space_Refine module? At low resolution (~ 3-4Å) I would like to include NCS restraints, but my molecule is flexible and the strict NCS constraints used in the Real_Space_Refine module are not appropriate. I am currently using phenix-1.18.2-3874. Best regards, Mark

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