June 2024 - phenixbb - phenix-online.org

real_space_refine is un-glycosylating my protein
by robert＠oeffner.net 28 Jun '24

28 Jun '24

Hi, I am trying to do a refinement with phenix.real_space_refine (RSR) on an EM map with a protein and a known ligand (NAG is the monomer code). In the pdb file supplied the C1 atom in the NAG molecule is positioned nicely in the EM density at a distance of 1.38Å from a ND2 atom in an ASN residue of the protein. The O1 atom in the NAG molecule is not present suggesting there should be a covalent bond here I believe. Both ASN and the NAG molecule have the same chainID. The problem is that RSR moves the sugar away even though I have used command line options such as pdb_interpretation.automatic_linking.link_carbohydrates=True or even pdb_interpretation.automatic_linking.link_all=True. The atoms end up at an un-bonded distance of 2.85Å from each other after refinement to the point that one of them is poking out of the density. Are my phil parameters incorrect? I noticed that I don't get an error message if I misspell say pdb_interpretation.automatic_linking.link_carbohydrates to pdb_interpretation.automatic_linking.link_carbohydrate. RSR still runs to completion so I'm wondering if it actually interprets the PHIL parameter at all. Another peculiarity is that the log file comments that NAG is an unusual residue rather than stating it is a well-known carbohydrate. If anyone on here knows how to compel phenix RSR into creating automatic links to carbohydrates suggestions would be much appreciated. Many thanks, Rob

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Postdoctoral Job Position in Infectious disease and Small Angle X-ray Scattering
by Susan Tsutakawa 26 Jun '24

26 Jun '24

Dear fellow structural biologists, I would appreciate it if you could forward this message to any graduate students that might be interested. We have an opening for a Postdoctoral Fellow to use small angle X-ray scattering (SAXS) on global health problems and biopreparedness in response to infectious disease work at the SIBYLS <http://bl1231.als.lbl.gov/> Beamline in the Advanced Light Source Synchrotron (ALS) at Lawrence Berkeley National Laboratory (LBNL) In this exciting role, you will work with a multi-disciplinary team of scientists as part of the ArpaH program <https://arpa-h.gov/>, structurally characterizing purified proteins from pandemic-potential organisms and relevant antibodies. The primary technique used will be Small Angle X-ray Scattering, which provides distance information that can reflect protein conformations and complexes in solution. You will work with a team to develop portable instrumentation to enable high throughput SAXS sample handling that can work at other synchrotrons. Through this work, you will develop ties to other national laboratories and within Berkeley Lab, specifically within the National Energy Research Scientific Computing Center (NERSC <https://www.nersc.gov/>), a division within the Computing Sciences Area’s <https://cs.lbl.gov/>. Prior experience in structural biology, protein biochemistry, and basic programming would be advantageous. Experience in SAXS is not a requirement. For more details. please see https://lbl.taleo.net/careersection/2/jobdetail.ftl?job=102111 This position has an anticipated start date of September 1, 2024. LBNL is located in the San Francisco Area in Berkeley, CA. Sincerely, Susan Tsutakawa Head of Structural Biology Molecular Biophysics and Integrated Bioimaging Biosciences Area Lawrence Berkeley National Laboratory.

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Multiple postdoctoral and Ph.D. positions at IBS (Grenoble)
by Elke De Zitter 26 Jun '24

26 Jun '24

Dear all, We have four immediate openings for postdoctoral researchers and one opening for a Ph.D. student in the DYNAMOP group at the Institute for Structural Biology in Grenoble (France). The first postdoctoral project focuses on the development and optimization of bio-scavengers targeting toxic compounds. The researcher with use time-resolved crystallography and in silico design methodologies. Interested candidates can find more information at [ https://www.ibs.fr/en/careers/job-offers/two-year-postdoctoral-position-for… | https://www.ibs.fr/en/careers/job-offers/two-year-postdoctoral-position-for… ] (application deadline: 12/07/2024 ). In the second postdoctoral project, the researcher will study the binding of toxic compounds to their physiological target and subsequent chemical reactivation via time-resolved crystallography. The third postdoctoral project is focused on the development of an experimental approach for the determination of the photoinduced structural dynamics of photosensitive biomolecules both in vitro and in cell using time-resolved X-ray scattering techniques. More information and the application procedure can be found on [ https://emploi.cnrs.fr/Offres/CDD/UMR5075-VALLAN-024/Default.aspx?lang=EN | https://www.ibs.fr/en/careers/job-offers/two-year-postdoctoral-position-for… ] (application deadline 30/06/2024). In the fourth postdoctoral project, the researcher will apply serial diffraction techniques (SSX, SFX, SED) to structurally study natural and recombinant protein nanocrystals Last, a 3-year funded PhD fellowship is available to explore the structural dynamics of the orange carotenoid protein by means of time-resolved serial crystallography. Applicants for the postdoctoral positions must have obtained a Ph.D. in structural biology, biophysics, biochemistry, physics, chemistry, or a related field. The candidates must show a track-record of publications in peer-reviewed journals. Applicants for the Ph.D. position are expected to have a master's degree in one of the above mentioned fields. All candidates are expected to be proficient in English and highly motivated to learn new skills. The candidates need to be a good team player as well as being capable of working independently. For inquiries regarding the positions and application processes, please contact Elke De Zitter ( [ mailto:[email protected] | elke.de-zitter(a)ibs.fr ] ), Martin Weik ( [ mailto:[email protected] | martin.weik(a)ibs.fr ] ), Giorgio Schiro ( [ mailto:[email protected] | giorgio.schiro(a)ibs.fr ] ) or Jacques-Philippe Colletier ( [ mailto:[email protected] | jacques-philippe.colletier(a)ibs.fr ] ) Best regards, Martin, Giorgio, Jacques-Philippe and Elke Elke De Zitter Institut de Biologie Structurale - IBS group DYNAMOP 71 avenue des Martyrs 38044 Grenoble Cedex 9, France +33 4 57 42 86 56 elke.de-zitter(a)ibs.fr

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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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Test post
by Billy Poon 18 Jun '24

18 Jun '24

This is a test message using the new hardware. -- 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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C-beta outliers
by Andrea Smith 14 Jun '24

14 Jun '24

Hi all, I am running Phenix v. 1.20.1-4487 on Windows and I keep on getting C-beta outliers of methionine residues after phenix.refine (happened in different data from two different proteins). Even if I correct the methionines in Coot (and they fit perfectly in the density), I get the outliers at the end of refinement again (while these outliers don't fit the density and I can see a green difference map where the C-beta is). Why is this? Is there a way to tell phenix.refine not to move a specific amino acid during refinement? Thanks, Andrea

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Help with Phenix/Rosetta Interface Installation
by Lucas Souza 14 Jun '24

14 Jun '24

Dear all, I have been trying to install rosetta (both release 371 and 20221.16.61629)/phenix (1.21.1-5286) interface in Ubuntu 24.04, but with no success at all. Both Rosetta installation and "rosetta.build_phenix_interface" ends up with no erros. But, when I run "rosetta.run_tests" or try to "phenix.rosetta_refine" I always get the error below: ------- /Generating 2 models on 1 processors... / /DEBUG dumping error message ERROR: Rosetta exited with status 139 stderr output: AN INTERNAL ERROR HAS OCCURED. PLEASE SEE THE CONTENTS OF ROSETTA_CRASH.log FOR DETAILS. Segmentation fault (core dumped) Traceback (most recent call last): File "/home/lucas/pckg/phenix-1.21.1-5286/build/../modules/phenix/phenix/command_line/rosetta_refine.py", line 315, in <module> run(sys.argv[1:], create_dir=True) File "/home/lucas/pckg/phenix-1.21.1-5286/build/../modules/phenix/phenix/command_line/rosetta_refine.py", line 198, in run debug=params.output.debug) File "/home/lucas/pckg/phenix-1.21.1-5286/modules/phenix/phenix/rosetta/refine.py", line 329, in __init__ self.run_jobs() File "/home/lucas/pckg/phenix-1.21.1-5286/modules/phenix/phenix/rosetta/refine.py", line 403, in run_jobs check_result(result) File "/home/lucas/pckg/phenix-1.21.1-5286/modules/phenix/phenix/rosetta/refine.py", line 394, in check_result raise RuntimeError("Aborted due to error in job %d." % result.job_id) RuntimeError: Aborted due to error in job 1./ /Something tells me this is related to the drop of support to Python2 in the new Ubuntu release, but I could not figure out what exactly is the issue. I uploaded both stdout and ROSETTA_CRASH.log in this email./ ------- If anyone can help me with this issue, I would be very happy. Thank you all! Lucas

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(IUCr) The evolution of raw data archiving and the growth of its importance in crystallography
by John R Helliwell 12 Jun '24

12 Jun '24

Dear Colleagues, Our article on this topic, which I imagine will be of keen interest, published this afternoon, is available open access from this weblink:- https://journals.iucr.org/m/issues/2024/04/00/lt5067/index.html Best wishes, John Emeritus Professor John R Helliwell DSc

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ADP-BEF-link.cif
by Heidi Schubert 10 Jun '24

10 Jun '24

Hi AAA ATPase modelers Could anyone send me the .cif file to define the link between ADP and a BeFx ion? I’m hoping this has not only the revised angle/bond info between O3B and Be but also the new angle between the Be and Fs different from the planar simple ion. AND, for my hexamer I assume the apply_link.def file then just reads with repetitive 5-line groups: refinement.pdb_interpretation.apply_cif_link { data_link = ADP-BEF residue_selection_1 = chain A and resname ADP and resseq 901 residue_selection_2 = chain A and resname BEF and resseq 902 } Where I change out the chain name but keep calling them residues_selection1 and 2? Many thanks Heidi Heidi Schubert Research Professor Department of Biochemistry University of Utah Rm 116 BPRB 20 S 2030 E Salt Lake City, UT 84112 heidi(a)biochem.utah.edu<mailto:[email protected]> 801-585-9776

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