April 2025 - phenixbb - phenix-online.org

CloudFlare and Spain
by Billy Poon 07 Jun '26

07 Jun '26

Hi everyone, Does anyone in Spain have issues reaching the Phenix website ( https://phenix-online.org)? Our website is behind CloudFlare and it looks like, periodically, some CloudFlare IP addresses are blocked in Spain due to some piracy issues. 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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for autobuild full sequence?
by James Holton 07 Jun '26

07 Jun '26

Hey all, Don't worry, nothing is funny today. I have a real question: Is there a way to force phenix.autobuild to build in the entire sequence? As in: the full length of the actual molecule that is in the crystal, such as what is supposed to go into SEQRES, regardless of "visible" density? I am trying to come up with a pipeline for prepping MD simulations of protein crystals. It seems proper to me that the molecule being simulated should be the actual molecular species, disordered bits an all. However, we don't seem to have good technology for building protein chains into "nothingness". Yes, I know Alphafold is a thing, but it is rubbish at clashes in the context of a crystal. I mean, I could write something, but does this tool already exist? Cheers, and happy Tuesday, -James Holton MAD Scientist

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Simulate map from model
by Ricardo Righetto 07 Jun '26

07 Jun '26

Hi, Apologies if I'm missing something obvious, but I was not able to find this in the documentation: is there a PHENIX tool for simulating Coulomb potential maps (aka "cryo-EM maps") from atomic models? I'm looking for something like the molmap <https://www.cgl.ucsf.edu/chimerax/docs/user/commands/molmap.html> command in ChimeraX, but more accurate. One such alternative is the simulate program from cisTEM, but I figured PHENIX might also have something? Thank you! -- Ricardo Diogo Righetto

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Question about geometry outliers in RealSpaceRefine
by Kevin M Jude 07 Jun '26

07 Jun '26

After a recent RealSpaceRefine run, the Geometry Restraints tab in the gui reports that I have two bond angle outliers > 4 sigma, but only lists one of them: D 180 MET N, D 180 MET CA, D 180 MET CB 114.170 109.342 4.2 So I check the logfile for the job and see: Bond angle restraints: 12582 Sorted by residual: angle pdb=" N MET D 180 " pdb=" CA MET D 180 " pdb=" CB MET D 180 " ideal model delta sigma weight residual 114.17 109.34 4.83 1.14e+00 7.69e-01 1.79e+01 angle pdb=" CA LEU B 79 " pdb=" CB LEU B 79 " pdb=" CG LEU B 79 " ideal model delta sigma weight residual 116.30 127.81 -11.51 3.50e+00 8.16e-02 1.08e+01 angle pdb=" C ASP B 333 " pdb=" N SER B 334 " pdb=" CA SER B 334 " ideal model delta sigma weight residual 122.74 127.19 -4.45 1.44e+00 4.82e-01 9.54e+00 angle pdb=" C GLN D 167 " pdb=" N ARG D 168 " pdb=" CA ARG D 168 " ideal model delta sigma weight residual 121.48 126.80 -5.32 2.04e+00 2.40e-01 6.80e+00 angle pdb=" C ASP B 163 " pdb=" N THR B 164 " pdb=" CA THR B 164 " ideal model delta sigma weight residual 123.47 127.30 -3.83 1.53e+00 4.27e-01 6.27e+00 ValidationCryoEM returns identical results except the gui says only one > 4-sigma outlier (at //D/Met180/). PDB Validation reports only the outlier at //B/Leu79/, which does have the largest sigma in the above log. My questions are: 1. Why does the gui report two 4-sigma outliers but only show one? 2. Why do the sigmas in the log file not correspond to the sigmas in the gui? Best wishes Kevin -- 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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DEN restraints and ECHT disorder models
by Roberto Battistutta 07 Jun '26

07 Jun '26

Dear all, From which version of Phenix are the DEN restraints and ECHT disorder models implemented in the ensemble refinement (as described in Ploscariu, N., Burnley, T., Gros, P. & Pearce, N. M. (2021). Improving sampling of crystallographic disorder in ensemble refinement. Acta Cryst. D77, 1357-1364)? Thank you very much, Roberto. Roberto Battistutta Associate Professor Department of Chemical Sciences University of Padua via Marzolo 1, 35131 Padova - ITALY tel. +39.049.827.5262 fax. +39.049.827.5829 roberto.battistutta(a)unipd.it

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twinning and translational NCS issues
by Wenhui Xi 07 Jun '26

07 Jun '26

Hi all, i have this crystal which was reported severe issues with twinning and translational NCS, thus when i tried to refine its structure, the Rfree would go up to nearly 60% which making directly solving its structure very hard. i'm writing to ask are there any helpful ways to deal with this issue? Thank you! Joyce [image: image.png]

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Research Specialist Position at the University of Illinois to Study Ribosome Structure | POLIKANOV Lab
by Yury Polikanov 07 Jun '26

07 Jun '26

*Research Specialist Position Available, Department of Biological Sciences, University of Illinois at Chicago - Polikanov Lab* *The Polikanov Laboratory in the Department of Biological Sciences at the University of Illinois at Chicago (IL, USA) is looking for a talented, skillful, and highly motivated researcher to fill the Research Specialist position to study the structure and function of the bacterial ribosome.* For fullest consideration, please submit an application and cover letter describing your scientific interests and how your previous research accomplishments and scientific interests fit with the scope of the research in the Polikanov research group at https://uic.csod.com/ux/ats/careersite/1/home/requisition/7573?c=uic *Position Summary:* The research in the Polikanov Laboratory at UIC is focused on understanding the basic principles of protein synthesis in bacteria, the modes of action of ribosome-targeting antibiotics, and the mechanisms of drug resistance at a structural level. This position is involved in the determination of high-resolution structures of ribosome functional complexes with various protein translation factors, tRNAs, and antibiotics using macromolecular X-ray crystallography and potentially cryo-EM techniques. Expected contributes to the design and delivery of research projects and collaborates with researchers to develop, execute, and interpret research projects. Performs complex laboratory and data collection techniques. *Duties & Responsibilities:* - Perform research relevant to the assigned projects; - Isolate, purify, and crystallize bacterial ribosomes; - Purify all additional components necessary for the crystallization experiments, such as recombinant proteins, tRNAs; - Collect X-ray diffraction data from the ribosome crystals at the APS and NSLS-II Synchrotrons; - Perform structural data analysis; - Coordinate, analyze, and document results for publication; - Directly participate in writing papers and grants based on the experimental data; - Train undergraduate and graduate students in research methods, use of equipment, record keeping, and laboratory database entry; - Attend weekly group meetings and journal club seminars. - Perform other related duties and participate in special projects as assigned. *Minimum Qualifications:* - A bachelor’s degree in chemistry, biochemistry, biophysics, or a related field is required. - A master’s degree in chemistry, biochemistry, biophysics, or a related field is preferred. - A minimum of 3 years related research experience. - Possesses and applies comprehensive knowledge of research principles, concepts, practices, and methods. - Proficient in standard molecular biology and biochemistry lab techniques, such as protein expression, and purification *Preferred Qualifications:* - Experience in structural biology (cryo-EM or X-ray crystallography); - Experience in RNA biology, ribosome, and/or protein synthesis fields. *About the University of Illinois Chicago:* UIC is among the nation’s preeminent urban public research universities, a Carnegie RU/VH research institution, and the largest university in Chicago. UIC serves over 34,000 students, comprising one of the most diverse student bodies in the nation and is designated as a Minority Serving Institution (MSI), an Asian American and Native American Pacific Islander Serving Institution (AANAPSI) and a Hispanic Serving Institution (HSI). Through its 16 colleges, UIC produces nationally and internationally recognized multidisciplinary academic programs in concert with civic, corporate and community partners worldwide, including a full complement of health sciences colleges. By emphasizing cutting-edge and transformational research along with a commitment to the success of all students, UIC embodies the dynamic, vibrant and engaged urban university. Recent “Best Colleges” rankings published by U.S. News & World Report, found UIC climbed up in its rankings among top public schools in the nation and among all national universities. UIC has nearly 260,000 alumni, and is one of the largest employers in the city of Chicago. *The University of Illinois System is an equal opportunity employer, including but not limited to disability and/or veteran status, and complies with all applicable state and federal employment mandates. Please visit Required Employment Notices and Posters <https://www.hr.uillinois.edu/cms/one.aspx?portalId=4292&pageId=5705> to view our non-discrimination statement and find additional information about required background checks, sexual harassment/misconduct disclosures, COVID-19 vaccination requirement, and employment eligibility review through E-Verify. **The university provides accommodations to applicants and employees. Request an Accommodation <https://jobs.uic.edu/request-and-accomodation/>*

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RapiData at SSRL 2024
by Smith, Clyde 23 Jan '26

23 Jan '26

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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Deadline approaching: Integrative Structural Biology Summer School Padua Italy 7-11 July 2025
by Roberto Steiner 28 Apr '25

28 Apr '25

Dear All, Deadline is approaching for the International Summer School on “Current and Future Integrative Structural Biology”, taking place in the beautiful city of Padua, Italy, from 7–11 July 2025. Do not forget to register at the following link www.school2025.cristallografia.org<http://www.school2025.cristallografia.org/> This school will have a strong focus on cryo-EM, along with discussions on other cutting-edge techniques essential for modern structural biology research. Expert international speakers and tutors will provide valuable insights through lectures and practical sessions. With best wishes, Roberto (on behalf of the organising committee) Roberto A Steiner www.steinerlab.org<http://www.steinerlab.org> https://twitter.com/steiner_lab roberto.steiner(a)kcl.ac.uk<mailto:[email protected]> Randall Centre for Cell and Molecular Biophysics Faculty of Life Sciences and Medicine King's College London Room 3.10A New Hunt's House, Guy's Campus SE1 1UL, London, UK Phone 0044 20 78488216 Fax 0044 20 78486435 roberto.steiner(a)unipd.it<mailto:[email protected]> Dipartimento di Scienze Biomediche Università degli Studi di Padova Viale G. Colombo 3 35131 Padova, Italia Telefono 0039 049 8276409 Responses to emails are not expected outside of your normal working hours.

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Phenix Dock & Rebuild Python Error
by Nicholas Clark 22 Apr '25

22 Apr '25

Hi all, I'm trying to run Phenix Dock & Rebuild on a Mac (Venture 13.6.7) but I keep getting a NameError in Python that "DESKTOP_TYPE" is not defined. Does anyone have a quick way to fix this? Can I edit the code directly in that line to explicitly state that I'm on a mac or is this a variable that should be set directly in the base Python installation? Below is the entirety of the error message: NameError : global name 'DESKTOP_TYPE' is not defined Traceback (most recent call last): File "/Applications/phenix-1.20.1-4487/modules/phenix/wxGUI2/Runtime.py", line 224, in OnComplete self.handle_complete_event(event) File "/Applications/phenix-1.20.1-4487/modules/phenix/wxGUI2/Templates.py", line 491, in handle_complete_event self.add_result_panel(result) File "/Applications/phenix-1.20.1-4487/modules/phenix/wxGUI2/Templates.py", line 512, in add_result_panel params=self.params) File "/Applications/phenix-1.20.1-4487/modules/phenix/wxGUI2/Templates.py", line 980, in __init__ JobOutputPanel.__init__(self, parent) File "/Applications/phenix-1.20.1-4487/modules/phenix/wxGUI2/Windows.py", line 551, in __init__ WidgetArea.__init__(self, parent) File "/Applications/phenix-1.20.1-4487/modules/phenix/wxGUI2/Windows.py", line 512, in __init__ self.DisplayWidgets() File "/Applications/phenix-1.20.1-4487/modules/phenix/wxGUI2/Programs/DockAndRebuild.py", line 112, in DisplayWidgets if (DESKTOP_TYPE in ['mac', 'kde', 'gnome']): NameError: global name 'DESKTOP_TYPE' is not defined Thanks! Best regards, Nick Clark

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