December 2021 - phenixbb - phenix-online.org

Call for Topical review articles for Acta Cryst F Structural Biology Communications
by John R Helliwell 25 Feb '22

25 Feb '22

Dear Colleagues, We draw your attention to our call for Topical review articles for Acta Cryst F Structural Biology Communications described here:- https://journals.iucr.org/f/issues/2021/11/00/me6156/index.html We welcome your proposals. Best wishes, John, Mark and Janet John Helliwell, Mark van Raaj and Janet Newman Emeritus Professor John R Helliwell DSc

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Postdoc Position at Caltech
by Hoelz, Andre 21 Dec '21

21 Dec '21

The Hoelz laboratory at the California Institute of Technology seeks to recruit an outstanding postdoctoral scientist in structural cell biology. Our laboratory focuses on the structure-function relationships of the nuclear pore complex and associated nucleocytoplasmic transport machinery. This position requires a recent Ph.D. degree in biochemistry/biophysics with a strong background in biochemistry, x-ray crystallography, or cryo-electron microscopy/tomography. The successful applicant should be a highly motivated individual with good organizational, communication, and interpersonal skills. The laboratory is well-funded and equipped with modern biophysical instrumentation. Importantly, Caltech has an exceptional infrastructure for structural biology, including access to a high intensity, completely automated, state-of-the-art crystallography beamline at the Stanford Synchrotron Radiation Lightsource (SSRL), as well as an excellent cryo-electron microscopy facility with access to FEI Arctica and Titan Krios microscopes equipped with Gatan K3 cameras. The position is available immediately and funded for 3+ years. Depending on performance, the position can be extended for additional years. To apply, please send your CV, a statement of research interests, and the names and contact information of at least two references to André Hoelz (hoelz(a)caltech.edu). Selected Recent Publications Bley, C.J., Nie, S., Mobbs, G.W., Petrovic, S., Gres, A.T., Liu, X., Mukherjee, S., Harvey, S., Huber, F.M., Lin, D.H., Brown, B., Tang, A.W., Rundlet, E.J., Correia, A.R., Chen, S., Regmi, S.G., Dasso, M., Patke, A., Palazzo, A.F., Kossiakoff, A.A., Hoelz, A. (2021). BioRxiv (https://doi.org/10.1101/2021.10.26.465790). Petrovic, S., Samanta, D., Perriches, T., Bley, C.J., Thierbach, K., Brown, B., Nie, S., Mobbs, G.W., Liu, X., Hoelz, A. (2021). Architecture of the linker-scaffold in the nuclear pore. BioRxiv (https://doi.org/10.1101/2021.10.26.465796). Lin, D. H., Hoelz, A. (2019). The structure of the nuclear pore complex (an update). Annu. Rev. Biochem. 88, 725-783. Lin, D. H., Correia, A.C., Cai, S.W., Huber, F.M. Jette, C.A., Hoelz, A.* (2018). Structural and functional analysis of mRNA export regulation by the nuclear pore complex. Nat. Commun., 2319. Huber, F., Hoelz, A., (2017). Molecular basis for protection of ribosomal protein L4 from cellular degradation, Nat. Commun. 8, 14354. Lin, D., Stuwe, T., Schilbach, S., Rundlet, E.J., Perriches, T., Mobbs, G., Fan, Y., Thierbach, K., Huber, F.M., Collins, L.N., Davenport, A.M., Jeon, Y.E., Hoelz, A. (2016). Architecture of the symmetric core of the nuclear pore, Science 352, aaf1015. [Cover] Stuwe, T., Bley, C.J., Thierbach, K., Petrovic, S., Schilbach, S., Mayo, D.J., Perriches, T., Rundlet, E.J., Jeon, Y.J., Collins, L.N., Huber, F.M., Lin, D.H., Paduch, M., Koide, A., Lu, V., Fischer, J., Hurt, E., Koide, S., Kossiakoff, A., Hoelz, A.* (2015). Architecture of the fungal nuclear pore inner ring complex, Science 350, 56-64. Stuwe, T., Correia, A., Lin, D. H., Paduch, M., Lu, V. T., Kossiakoff, A. A., Hoelz, A.* (2015). Architecture of the nuclear pore complex coat. Science 347, 1148-1152. Hoelz, A., Debler, E.W., Blobel, G. (2011). Structure of the Nuclear Pore Complex, Annu. Rev. Biochem. 80, 613-643.

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Query re individual sites (real space)
by Oliver Clarke 21 Dec '21

21 Dec '21

Hi, While refining an X-ray structure using phenix.refine (v1.20-4444), I get the attached table during real-space refinement of coordinates. What are the criteria for selecting the correct weighting factor? I assumed it would be the delta between R/Rfree and/or the clash score, but it doesn't seem to exactly match either in this table (and the same for other iterations of refinement). Is it just incorrectly writing the clash score in the "Accepted refinement result" line? Shouldn't this match the line from the selected weight (here 0.125 so should be 6.1, not 7.1)? Cheers Oli

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Phenix.metal_coordination not working in 1.20-4444
by Oliver Clarke 20 Dec '21

20 Dec '21

Hi, When I try to run phenix.metal_coordination in v1.20-4444 (as phenix.metal_coordination whatever.pdb), I get the attached error. Traceback (most recent call last): File "/Applications/phenix-1.20-4444/build/../modules/elbow/elbow/command_line/metal_coordination.py", line 50, in <module> from metal_coordination_params import master_phil_string ImportError: No module named metal_coordination_params Cheers Oli

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Re: [phenixbb] sequence file error in phenix map-to-model
by Raja Dey 20 Dec '21

20 Dec '21

Hi Sharan, I am getting the same error saying , 'is not a known sequence type'. Also, please see the image enclosed below that tells how the template sequence file should look like. I tried with/without space after '>' sign and getting the same error message. [image: image.png] Any suggestion from anyone would be appreciated. Thanks, Raja On Mon, Dec 20, 2021 at 3:29 PM Sharan Karade <sharankarade(a)gmail.com> wrote: > Hi Raja, > > Try to use the file attached here. I hope it works. > > On Mon, Dec 20, 2021 at 3:27 PM Raja Dey <rddey80(a)gmail.com> wrote: > >> Sorry, the error message is >> D41-st-Trx-sequence.txt is not a known sequence type. >> >> Can someone help solving this problem? >> >> Best regards, >> Raja >> >> On Mon, Dec 20, 2021 at 12:02 PM Raja Dey <rddey80(a)gmail.com> wrote: >> >>> Hi, >>> I am getting an error with the sequence file attached. Could you please >>> tell me what's wrong with this file? The error is enclosed below: >>> Starting phenix >>> on Mon Dec 20 11:45:46 2021 by rdey >>> >>> =============================================================================== >>> >>> Processing files: >>> >>> ------------------------------------------------------------------------------- >>> >>> Found phil, >>> /atavium/home/jfrench/rdey/st_JF/.phenix/project_data/map_to_model_8.eff >>> >>> Processing PHIL parameters: >>> >>> ------------------------------------------------------------------------------- >>> >>> Adding PHIL files: >>> ------------------ >>> >>> /atavium/home/jfrench/rdey/st_JF/.phenix/project_data/map_to_model_8.eff >>> >>> Processing files from PHIL: >>> >>> ------------------------------------------------------------------------------- >>> >>> Found real_map, >>> /atavium/home/jfrench/rdey/st_JF/cryosparc_P11_J139_008_volume_map_half_A.mrc >>> >>> Files not used by program: >>> -------------------------- >>> /atavium/home/jfrench/rdey/st_JF/D41-st-Trx-sequence.txt >>> /atavium/home/jfrench/rdey/st_JF/p11_j140_sharpened-map_box.ncs_spec >>> >>> Final processed PHIL parameters: >>> >>> ------------------------------------------------------------------------------- >>> data_manager { >>> real_map_files = >>> "/atavium/home/jfrench/rdey/st_JF/cryosparc_P11_J139_008_volume_map_half_A.mrc" >>> default_real_map = >>> "/atavium/home/jfrench/rdey/st_JF/cryosparc_P11_J139_008_volume_map_half_A.mrc" >>> phil_files = >>> "/atavium/home/jfrench/rdey/st_JF/.phenix/project_data/map_to_model_8.eff" >>> default_phil = >>> "/atavium/home/jfrench/rdey/st_JF/.phenix/project_data/map_to_model_8.eff" >>> } >>> input_files { >>> map_file = >>> /atavium/home/jfrench/rdey/st_JF/cryosparc_P11_J139_008_volume_map_half_A.mrc >>> seq_file = /atavium/home/jfrench/rdey/st_JF/D41-st-Trx-sequence.txt >>> ncs_file = >>> /atavium/home/jfrench/rdey/st_JF/p11_j140_sharpened-map_box.ncs_spec >>> } >>> reconstruction_symmetry { >>> symmetry = """D2""" >>> } >>> control { >>> nproc = 2 >>> } >>> job_title = """D41-st-Trx-19Dec21""" >>> >>> >>> Starting job >>> >>> =============================================================================== >>> Validating inputs >>> >>> >>> Thanks a lot for your time. >>> Regards, >>> Raja >>> >>> _______________________________________________ >> phenixbb mailing list >> phenixbb(a)phenix-online.org >> http://phenix-online.org/mailman/listinfo/phenixbb >> Unsubscribe: phenixbb-leave(a)phenix-online.org > > > > -- > Sharan Karade > Postdoc-fellow > IBBR-UMD, 9600 Gudelsky Dr, > Rockville > Maryland 20850 > > >

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sequence file error in phenix map-to-model
by Raja Dey 20 Dec '21

20 Dec '21

Hi, I am getting an error with the sequence file attached. Could you please tell me what's wrong with this file? The error is enclosed below: Starting phenix on Mon Dec 20 11:45:46 2021 by rdey =============================================================================== Processing files: ------------------------------------------------------------------------------- Found phil, /atavium/home/jfrench/rdey/st_JF/.phenix/project_data/map_to_model_8.eff Processing PHIL parameters: ------------------------------------------------------------------------------- Adding PHIL files: ------------------ /atavium/home/jfrench/rdey/st_JF/.phenix/project_data/map_to_model_8.eff Processing files from PHIL: ------------------------------------------------------------------------------- Found real_map, /atavium/home/jfrench/rdey/st_JF/cryosparc_P11_J139_008_volume_map_half_A.mrc Files not used by program: -------------------------- /atavium/home/jfrench/rdey/st_JF/D41-st-Trx-sequence.txt /atavium/home/jfrench/rdey/st_JF/p11_j140_sharpened-map_box.ncs_spec Final processed PHIL parameters: ------------------------------------------------------------------------------- data_manager { real_map_files = "/atavium/home/jfrench/rdey/st_JF/cryosparc_P11_J139_008_volume_map_half_A.mrc" default_real_map = "/atavium/home/jfrench/rdey/st_JF/cryosparc_P11_J139_008_volume_map_half_A.mrc" phil_files = "/atavium/home/jfrench/rdey/st_JF/.phenix/project_data/map_to_model_8.eff" default_phil = "/atavium/home/jfrench/rdey/st_JF/.phenix/project_data/map_to_model_8.eff" } input_files { map_file = /atavium/home/jfrench/rdey/st_JF/cryosparc_P11_J139_008_volume_map_half_A.mrc seq_file = /atavium/home/jfrench/rdey/st_JF/D41-st-Trx-sequence.txt ncs_file = /atavium/home/jfrench/rdey/st_JF/p11_j140_sharpened-map_box.ncs_spec } reconstruction_symmetry { symmetry = """D2""" } control { nproc = 2 } job_title = """D41-st-Trx-19Dec21""" Starting job =============================================================================== Validating inputs Thanks a lot for your time. Regards, Raja

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model shifts after real space refinement
by Ashok Nayak 15 Dec '21

15 Dec '21

Hi, Is there a way to say keep_origin=False in phenix real space refinement. I used it in the command line version of v3958. It didn't take that. There is a model shift after the refinement which I think is because the program brings the map to the origin and hence the refined model as well. Thanks, Ashok -- Post-Doctoral Fellow Department of Biochemistry and Molecular Biology, Sidney Kimmel cancer Center Thomas Jefferson University 1020 Locust Street, JAH Philadelphia, PA, 19107 Phone: 804-661-4620

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Job Opportunities at Surrozen Inc (SFO Bay Area)
by Parthasarathy Sampathkumar 15 Dec '21

15 Dec '21

Dear All, I would like to bring to the attention of suitable candidates the following exciting job opportunities at Surrozen Inc, located in South San Francisco. Surrozen is a biotechnology company focused on discovering and developing novel regenerative medicines with a focus on unlocking the powerful self-renewal properties of the body through specific control of the Wnt signaling pathway. Our vision is to engage the body’s own biological tissue repair mechanisms with our targeted regenerative antibodies, overcoming research and development hurdles that have been previously intractable, and have held back drug development efforts in the promising area of Wnt biology. *Research Associate/Senior Research Associate, Biochemistry and Biophysics:* https://apply.workable.com/surrozen/j/ACBA0B0D96/ *Scientist, Protein Sciences: * https://apply.workable.com/surrozen/j/DF4518083F/ *Research Associate, Protein Purification:* https://apply.workable.com/surrozen/j/7D64A01556/ Many Thanks, Best Wishes, Partha Sampathkumar PhD Principal Scientist Surrozen Inc Email: partha(a)surrozen.com

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NIH-funded Postdoc, Membrane Protein Structural Biology
by Alex Vecchio 14 Dec '21

14 Dec '21

Dear Phenix Community, I would like to bring your attention to an NIH-funded Postdoc position in the Vecchio Lab <https://vecchio-lab.unl.edu> at the University of Nebraska studying membrane proteins and membrane protein assemblies using X-ray crystallography and cryoEM. We are looking for a Ph.D., with experience in membrane proteins and/or crystallography. Potential exists for the candidate to *acquire cryoEM expertise* during the postdoc training via an NSF fellowship. For more information, please read our ad HERE <https://jobrxiv.org/job/vecchio-lab-at-university-of-nebraska-27778-nih-fun…> . To apply or for specific questions, please contact me at avecchio(a)unl.edu. All the best, Alex -- *Alex J. Vecchio, Ph.D.* *Assistant Professor* *University of Nebraska–Lincoln* *Department of Biochemistry* *Center for Integrated Biomolecular Communication* 1901 Vine Street N113 / N114 Beadle Center [Lab / Office] Lincoln, NE 68588 avecchio(a)unl.edu 1 [402] 472-2933

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Ligand CIF file in real space refinement
by Fadini, Alisia 06 Dec '21

06 Dec '21

Hello, I am trying to use phenix.real_space_refine to improve the fit between my protein's ligand and the electron density. I include a CIF file that has worked well for reciprocal space refinement, made through JLigand. It seems to me that the CIF file is read properly, it does not produce errors and the restrains are stated correctly in the output .cif file that includes all protein + ligand atoms. However, the output pdb shows a distorted ligand, where specific bond angles and bond lengths have been modified past what should be allowed by the restrains. Any insights on how to improve/the causes of this effect would be very welcome! My command is : phenix.real_space_refine model.pdb map.ccp4 ligand.cif resolution=1.63 Thank you, Alisia

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