- phenixbb - phenix-online.org

on b-factor refine
by Smith Liu 15 Mar '16

15 Mar '16

Dear All, I just read a paper on phenix refine, which contains content "B-factor refinement (two groups per residue) ". Here the "two groups per residue" should be accomplished by the phenix command line rather than the GUI, right? And if right, will you please let me know the command for "two groups per residue" for B-factor refine? Smith

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Real space difference maps?
by Oliver Clarke 15 Mar '16

15 Mar '16

Hello, is there any possibility of (or current plan for) including the capacity in a future PHENIX release to calculate a residual map automatically after phenix.real_space refine, (i.e. simulating a map from the model incorporating corrections for B-factor variation and calculating a difference map with the experimental map)? This would be very convenient when building into EM maps. Cheers, Oli

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Postdoc position available at LBNL
by Peter Zwart 14 Mar '16

14 Mar '16

Berkeley Lab's Molecular Biophysics and Integrated Bioimaging Division is looking for a Computational Biologist to work on the development of computational and experimental methodologies for Fluctuation X-ray Scattering (FXS; *http://bit.ly/1W6SONZ* <http://bit.ly/1W6SONZ>) and associated biophysical techniques, such as SAXS/WAXS and Single Particle diffraction. The candidate will be involved in the development and expansion of the underlying theory of FXS, either as a standalone technique or in a hybrid capacity, and will aid in its practical deployment. For details, have a look here: https://lbl.taleo.net/careersection/jobdetail.ftl?job=82189&lang=en#.Vubva0… Regards Peter Zwart -- ----------------------------------------------------------------- P.H. Zwart Staff Scientist Berkeley Center for Structural Biology, Science lead Lawrence Berkeley National Laboratories 1 Cyclotron Road, Berkeley, CA-94703, USA BCSB: http://bcsb.als.lbl.gov PHENIX: http://www.phenix-online.org CAMERA: http://camera.lbl.gov/ -----------------------------------------------------------------

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phenix autosol
by Vandna Kukshal 13 Mar '16

13 Mar '16

Hi , I am solving a structure using selenium SAD using autosol. Autosol gave me nice solution but many loop and side chain density is missing. autosol gave me many different output MTZ files . for building further in coot which MTZ file i should use and for refinement in phenix refinement which MTZ file i should use . I tried doing refinement with .sca file it gave me increase Rfree afte single cycle of refinement . thanks for your suggestions. -- Vandna Kukshal Postdoctral Research Associate Dept. Biochemistry and Molecular Biophysics Washington University School of Medicine 660 S. Euclid, Campus Box 8231 St. Louis, MO 63110

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Feature request: multi-stage refinement protocols from the GUI?
by Tristan Croll 12 Mar '16

12 Mar '16

Hi all, I'm personally a big fan of the Phenix GUI, in particular for its automated record keeping for different runs. One thing I really wish it had, though, is the option to define more complex refinement scenarios as a single run. An example of what I'm talking about is the following protocol that has been working very well for me on a 3.6 Å strucutre: - ~6 rounds of refinement of TLS, a single group B-factor and occupancies (the latter for a very small set of residues, mostly low-occupancy lead ions) with positions fixed - ~8 rounds of TLS and individual B-factor refinement, still with positions fixed and with no further occupancy refinement - ~8 rounds of TLS, B-factor and position refinement with torsion-angle restraints to the starting model - ~8 rounds of position refinement with no restraints other than standard stereochemistry and metal bonds. I know that all of this could be scripted quite easily from the command line, but it would be fantastic to be able to queue up such a protocol as a single continuous job in the GUI. Best regards, Tristan

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Re: [phenixbb] Fluorescence group of eYFP
by miyatake 09 Mar '16

09 Mar '16

Hello, now I found a solution like below; 1) make links using " Extensions > Modeling > Make Link " in Coot 2) Do Ready_Set using the PDB file, and you'll get cif and link.edits files 3) Delete all the lines which contain OXT in the cif file. 4) Involve the cif and link.edits files to the Phenix.refine job It will work well for the CR2 containing GFP proteins. Best, Miyatake On Tue, 08 Mar 2016 15:00:29 -0800 André Hoelz <hoelz(a)caltech.edu> wrote: > Have you found a solution that works now? I have noticed the same problem that the OXT atom is incorporated and no bond is formed. I would be grateful if you share your a solution. > > Sent from my BlackBerry 10 smartphone. > Original Message > From: miyatake > Sent: Monday, March 7, 2016 11:07 PM > To: Pavel Afonine > Cc: phenixbb(a)phenix-online.org > Subject: Re: [phenixbb] Fluorescence group of eYFP > > Dear Pavel, > > Thank you for your e-mail. > > The bonds I want to connect are between CR2 and amino acids like below; > > C PHE A 64 N1 CR2 A 66 > C3 CR2 A 66 N LEU A 68 > > so I made links by the "make link" of Coot. > > Then I made .cif file by the Ready_Set, but I noticed > it always contained OTX terminator atom of CR2, so the CR2 connections > to the next amino acids were something wrong after refinement if I used the cif > as it was. > > Thus I deleted OTX in the cif file, and then in turn it went well. > > I wonder why the cif file contained OTX, is it something a bug? > > Thank you for your attention. > > Miyatake > > > > On Mon, 7 Mar 2016 08:40:21 -0800 > Pavel Afonine <pafonine(a)lbl.gov> wrote: > > > Hi Miyatake, > > > > could you please send me (and copy to Nigel) the PDB file (and any > > ligand CIF files you use) and tell what bonds you are expecting to have > > and that brake as result of refinement. > > > > Thanks, > > Pavel > > > > On 3/7/16 03:40, miyatake wrote: > > > Dear all, > > > > > > I'm trying to a mutant of eYFP, which has fluorescence group, > > > CR2. > > > > > > During the refinement, however, the bonds between the CR2 and other amino acids > > > were cleaved even I added the cif file created by the ReadySet. > > > > > > > > > Would some one give me suggestions to solve the problem? > > > > > > Miyatake > > > > > > _______________________________________________ > > > phenixbb mailing list > > > phenixbb(a)phenix-online.org > > > http://phenix-online.org/mailman/listinfo/phenixbb > > > Unsubscribe: phenixbb-leave(a)phenix-online.org > > > > _______________________________________________ > phenixbb mailing list > phenixbb(a)phenix-online.org > http://phenix-online.org/mailman/listinfo/phenixbb > Unsubscribe: phenixbb-leave(a)phenix-online.org

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Re: [phenixbb] 7th workshop on Neutron Scattering Applications in Structural Biology
by Meilleur, Flora 08 Mar '16

08 Mar '16

Second announcement 7th Workshop on Neutron Scattering Applications in Structural Biology Oak Ridge, TN. May 16 - May 20, 2016 Detailed information can be found on the workshop web page: https://conference.sns.gov/event/15 Application deadline: April 1, 2016 The workshop on Neutron Scattering Applications in Structural Biology aims at enabling structural biologists to fully exploit the latest instrumentation and software development at the SNS and HFIR facilities at Oak Ridge National Laboratory. Attendees will participate in lectures and tutorials focusing exclusively on neutron techniques applied in structural biology. The workshop is designed for graduate students, post-doctoral fellows and faculty new to or with limited experience of neutron scattering. Travel and accommodation expenses are supported for selected participants from the United States. International applications are welcome. However the course organization is not able to support travel or accommodation. The number of participants will be limited to 15. There is no registration fee for all selected participants. The application package consisting of 1) Information form, 2) CV, 3) Applicant motivation letter (1/2 to 1 page), 4) Principal Investigator letter of support (for graduate students only; 1/2 to 1 page), should be sent electronically to meilleurf(a)ornl.gov<mailto:[email protected]> before April 1, 2016. Flora Meilleur, Ph. D Associate Professor, Molecular and Structural Biochemistry North Carolina State University Neutron Sciences Directorate Oak Ridge National Laboratory Phone: 865-242-5747

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Wrong stereochemical restraint of Hyp
by YANG HAI 07 Mar '16

07 Mar '16

Dear Phenix Developers, I was refining a structure containing L-hydroproline (HYP) and it looks like that the dictionary for HYP in Phenix has the wrong stereochemical restraint. I modeled as L-hydroxylproline (trans) but the phenix.refine always flipped the hydroxyl group and ended up as L-allo-hydroxylproline (cis). I created a .cif file and the issue is resolved, but it would be nice if the restraint can be fixed in the next version of Phenix. Thanks a lot Yang Hai Department of Chemistry, University of Pennsylvnia

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Constrained groups for occupancy refinment
by Jan Abendroth 07 Mar '16

07 Mar '16

Hi all, I have a case where a residue is in two alternative conformations for chain A and chain B. This residue (Arg 62) happens to be close to its NCS mate, such that only conformations A for both chains or only conformations B can take place at the same time. I tried to follow guidance from the CNG newsletter 2015/07 and set up the constrained groups as shown below. However, the refinement crashes with an AtomSelectionError. Any ideas what I could have done differently? Cheers, Jan refinement { refine { occupancies { constrained_group { selection = chain A and resseq 62 and altloc A or \ chain B and resseq 62 and altloc A or selection = chain A and resseq 62 and altloc B or \ chain B and resseq 62 and altloc B or } } } } -- Jan Abendroth Emerald Biostructures Seattle / Bainbridge Island, WA, USA home: Jan.Abendroth_at_gmail.com work: JAbendroth_at_embios.com http://www.emeraldbiostructures.com

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Phenix omit maps
by wtempel 05 Mar '16

05 Mar '16

Hello all, is the output of phenix.maps with maps.omit.selection=(resname LIG) equivalent to removal of LIG atoms from coordinates and subsequent map calculation with an empty maps.omit.selection? What, if any, measures of bias removal are applied in the process of map calculation, absent any explicit efforts by the user to modify coordinates? Thank you, Wolfram Tempel

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