January 2022 - phenixbb - phenix-online.org

RapiData at SSRL 2022 - application deadline extended by two weeks!
by Smith, Clyde 12 Jan '23

12 Jan '23

We have extended the deadline for applications for a place at the RapiData 2022 @ SSRL workshop to next Friday, February 4th 2022! There are still a few spots left, so get your application in! The workshop will be held virtually from May 4 - 14 2022. The course will comprise 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, small angle scattering and cryoEM). There will also be several days of software tutorials (HKL3000,XDS, CCP4/DIALS, Phenix, AutoSharp/AutoProc, Shelx, Coot) and you will all get to connect remotely to the SSRL beamlines to collect both monochromatic and MAD/SAD data. There is also an opportunity to ship your own samples to SSRL prior to the workshop, and collect your own data. Please visit https://www-ssrl.slac.stanford.edu/rapidata/rapidata-2022/index.html and use the links on the "registration" page to apply for the course. Successful applicants will be notified later in February 2022 and invited to register at that time (there will be no fee for registration). Regards, Clyde Smith (csmith(a)slac.stanford.edu) and Silvia Russi (srussi(a)slac.stanford.edu) Workshop Organizers

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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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PhD fellowship at NC State & Oak Ridge National Laboratory
by Meilleur, Flora 25 Jan '22

25 Jan '22

Thank you for sharing the following PhD opportunity with interested students! Best wishes, Flora PhD fellowship in Structural Biology of Metalloenzymes at NC State & Oak Ridge national Laboratory A Ph. D. research fellowship (up to 5 years) in enzyme chemistry is available with Dr. Flora Meilleur. The position is joint between North Carolina State University, the Ph. D. granting institution where the Ph. D. candidate will complete the program core coursework, and Oak Ridge National Laboratory, where research activities will be performed. The project will focus on lytic polysaccharide monooxygenase, a class of copper containing metalloenzymes involved in biomass oxidation. High resolution X-ray and neutron crystallography will be used primarily to study the enzymatic mechanism. The project will involve collaborations to include spectroscopic and biophysical methods as well as computational approaches. Key publications on the topic include (complete list here<https://scholar.google.com/citations?user=i0aLPhYAAAAJ&hl=en>): Schröder G.C., O'Dell W.B., Webb S.P., Agarwal P.K., and Meilleur F. (2021) Capture of activated dioxygen intermediates at the copper-active site of a lytic polysaccharide monooxygenase. ChemRxiv. 10.26434/chemrxiv-2021-n4c1x<https://chemrxiv.org/engage/chemrxiv/article-details/61b3cdd8689c875d6adea9…> O'Dell W. B., Aggarwal P., Meilleur F. (2017) Oxygen Activation at the Active Site of a Fungal Lytic Polysaccharide Monooxygenase. Angew. Chem. Int. Ed. 56:767-770<https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5340418/> The candidate should hold a degree in chemistry or biochemistry. Prior experience in molecular biology, protein expression, or protein purification is an advantage. The position is available now and applications are welcome until the position is filled. Interested candidates must email a detailed CV, a letter of motivation and the name of three scientists for reference to Flora Meilleur<mailto:[email protected]?subject=Application%20to%20NC%20State%20/%20ORNL%20PhD%20Fellowship> prior to applying to the Graduate Program in Biochemistry at NC State. For further information about the position, interested candidates can contact Flora Meilleur<mailto:[email protected]?subject=Questions%20about%20NC%20State/ORNL%20PhD%20Fellowship>. Further information about the NC State Biochemistry graduate program here<https://cals.ncsu.edu/molecular-and-structural-biochemistry/>. Further information about the neutron facilities at Oak Ridge National Laboratory here<https://neutrons.ornl.gov/>.

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refining a covalent-bound ligand (part 2)
by Sergio A. Sampieri 22 Jan '22

22 Jan '22

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refining a covalent-bound ligand (part 2) (try 2)
by Sergio A. Sampieri 22 Jan '22

22 Jan '22

Hi all, hope this message finds you well. As in a previous topic from 2018, I’m having problems refining a covalent-bounded ligand. The link shall be made between a carbon atom that is double bonded to an oxigen “SMILES C1=CC=C(C=C1)C=O” and the SG group of a Cys residue. I generated a CIF dictionary through AceDRG in COOT and CCP4i2. But after trying different approaches during refinement, (Automatic Linking parameters, Atom selection, acceptor & donnor, ligand bond cut off and so) the result keeps being a non bounded enzyme-ligand complex (“Not linked: pdbres="LIG A 401”). I readed in the phenixbb that this was solved by changing the nature of the ligand ( http://www.phenix-online.org/pipermail/phenixbb/2018-February/023718.html), but is not the way I would like to follow. Any suggestions or ideas would be greatly appreciated, thanks a lot for your time. Stay safe. -- “I’ve learned to think like a virus; no neurons, a lot of sex, and a lot of errors.” John J. Holland Biól. Sergio Aguirre Sampieri

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AlphaFold changes everything": new lecture on the Phenix tutorials channel
by Dorothee Liebschner 22 Jan '22

22 Jan '22

Hi everyone, I hope you will like "AlphaFold changes everything <https://www.youtube.com/watch?v=9IExeA_A8Xs>", the latest addition to the Phenix tutorials channel at www.youtube.com/c/phenixtutorials. In this full-length lecture, Tom Terwilliger shows how AphaFold models are great hypotheses that can help you jump-start structure determination by X-ray crystallography and Cryo-EM. The talk is from the ReNaFoBis.FRISBI webinar series organized by Jean Cavarelli (https://www.renafobis.fr/seminaires-web-renafobis). Best wishes, The Phenix team -- Research Scientist, Molecular Biophysics and Integrated Bioimaging Lawrence Berkeley National Laboratory 1 Cyclotron Road, M/S 33R0345 Berkeley, CA 94720 Tel: (510) 486-5709 Fax: (510) 486-5909 Web: https://phenix-online.org

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Staff Scientist opportunity in "Single Molecule Biophysics" at Human Technopole in Milan, Italy
by Sebastiano Pasqualato 20 Jan '22

20 Jan '22

Dear all, another job post from the newly established life science Institute of Milan, Italy, Human Technopole (http://www.humantechnopole.it/en/ <http://www.humantechnopole.org/>) We are looking for a Staff Scientist to establish and manage a Single Molecule Biophysics Platform as a part of an ongoing collaboration with Lumicks. We are looking for persons with proven track record in single-molecule studies, with specific experience with Lumicks optical tweezers (C-trap and M-trap). The successful candidate will work in close collaboration with the Scientists of the Structural Biology Research Centre of Human Technopole (https://humantechnopole.it/en/research-centres/structural-biology/ <https://humantechnopole.it/en/research-centres/structural-biology/>), and their platform will be part of a larger number of research facilities and platforms, such as the Cryo-EM facility (https://humantechnopole.it/en/facilities/cryo-electron-microscopy-facility/ <https://humantechnopole.it/en/facilities/cryo-electron-microscopy-facility/>). More details, and how to apply can be found at the following link: https://careers.humantechnopole.it/o/staff-scientist-single-molecule-biophy… <https://careers.humantechnopole.it/o/staff-scientist-single-molecule-biophy…> Please, share this ad to anyone you think might be interested, ciao, Sebastiano PS: sorry for the double posting in different bulletin boards Sebastiano Pasqualato Biophysics Platform Manager

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Structural Biology Cryo-EM TT Asst. Professor at University of Nebraska
by Alex Vecchio 17 Jan '22

17 Jan '22

Dear PhenixBB Community, I would like to bring your attention to a Tenure-track faculty position at the rank of Assistant Professor in the Department of Biochemistry at the University of Nebraska-Lincoln (UNL). We are looking for candidates with research programs studying the structural biology of macromolecules relevant to human health or disease using cryo-EM. UNL has established a state-of-the-art cryo-EM facility that will house a Glacios 200 keV Cryo-TEM equipped with a Falcon 4i detector, a Selectris energy filter, and have capabilities for microED of crystalline samples. The candidate will be part of the Nebraska Center for Integrated Biomolecular Communication (NCIBC), an NIH-funded COBRE center, and have the opportunity to collaborate with other researchers spanning several departments across the UNL. For more information, please read our ad in Science Careers, HERE <https://jobs.sciencecareers.org/job/580579/assistant-professor-structural-b…> . To apply, please visit the UNL Employment Website, HERE <https://employment.unl.edu/postings/76851>. 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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regarding number of unique reflections
by Viney Singh 14 Jan '22

14 Jan '22

Dear all, First of all sorry for the novice question. I *processed* one of my datasets using xds. Since I was not expecting an anomalous signal, I kept Friedel's Law = True. The number of unique reflections I got: *17,000* I used xds_ASCII.HKL after correct.LP and converted it to mtz using Phenix with 10% reflections for Rfree calculations. Now, when I am trying to* refine *the structure in Phenix, the structure is being refined against *32,300* reflections with *3230* reflections for Rfree calculation. Looks like refinement is treating Friedel's pair as two different reflections. When I am trying to upload PDB on rcsb, on the refinement tab, the number of reflections used for refinement and Rfree calculations are shown as 32,300 and 3220 respectively, while in the validation report, no. of reflections used for Rfree calculation are shown as *1700*. I would really appreciate if someone can guide me to resolve this discrepancy. Thanks in advance. Viney

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Staff Scientist opportunity in "Structural Proteomics" at Human Technopole in Milan, Italy
by Sebastiano Pasqualato 14 Jan '22

14 Jan '22

Dear all, the newly established Human Technopole Institute, based in Milan, Italy (http://www.humantechnopole.it/en/ <http://www.humantechnopole.org/>) is looking for a Staff Scientist to manage the Structural Proteomics Facility. We are looking for persons with proven track record in high-resolution MS-based proteomics, with specific experience in cross-linking- (XL) and native- MS. Structural proteomics technologies will be closely integrated with the Science Groups of the Structural Biology Research Centre of Human Technopole (https://humantechnopole.it/en/research-centres/structural-biology/ <https://humantechnopole.it/en/research-centres/structural-biology/>), and will be part of a larger number of research facilities and platforms, such as the Cryo-EM facility (https://humantechnopole.it/en/facilities/cryo-electron-microscopy-facility/ <https://humantechnopole.it/en/facilities/cryo-electron-microscopy-facility/>) More details, and how to apply can be found at the following link: https://careers.humantechnopole.it/o/staff-scientist-to-manage-a-structural… <https://careers.humantechnopole.it/o/staff-scientist-to-manage-a-structural…> Please, share this ad to anyone you think might be interested, ciao, Sebastiano PS: sorry for the double posting in different bulletin boards Sebastiano Pasqualato Biophysics Platform Manager

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