- ChimeraX-users - RBVI Mailing Lists

Movie clipping planes in chimera x
by Greg Martin 13 Jan '23

13 Jan '23

Hi, I’m trying to make a movie where I highlight different parts of a large complex. For one scene, I’m trying to interpolate between a zoomed out view of the whole complex (view p1), and then a zoomed in view of an interface (view p2), which shows a series of interactions. What I want is a smooth transition of both the view and clipping plane from p1 to p2. However, when I give the command: view p1 p2 100 it interpolates the two positions/zooms fine, in 100 frames, but then after the movement adjusts the clipping plane all at once. Is there a way to have the plane adjusted smoothly during transition between p1 and p2? I’ve also tried fly, but this disregards clipping planes altogether. Views are saved with view name p1 view name p2 Thanks in advance, Greg -- Gregory Martin, PhD. Staff Scientist Lab of Andrew Ward Department of Integrative Structural & Computational Biology The Scripps Research Institute La Jolla, CA 92037

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Inquiry: Map sequence conservation onto a protein structure
by Gomez Barillas, Andrea 13 Jan '23

13 Jan '23

Dear ChimeraX developers, I am trying to map sequence conservation onto a protein structure. I am using ChimeraX version (version 1.4 (2022-06-03). For this purpose, I was trying to use a tutorial from 2014 for Chimera for Mapping Sequence Conservation onto Structures (Showing Sequence Conservation in Chimera (ucsf.edu)<https://www.cgl.ucsf.edu/chimera/data/tutorials/systems/outline.html>). It seems that some the tools mentioned in this tutorial are no longer available, or maybe work differently. Specifically, the tutorial's "Case 4" (calculating values outside of Chimera but showing them in Chimera) has you set an attribute, and then render/color the structure based on the attribute. The Tools > Structure Analysis > Define attribute mentioned in the tutorial is no longer available. I was as able to assign values directly to structure residues in a text file and read it in using the command defattr instead. The next step would be to use the tool Render by Attribute for coloring but I cannot find this option anymore. Is there a different command I can use for this step, or a new functionality built into ChimeraX I could use for my purpose of mapping sequence conservation onto the structure? One relevant point is that I already have my sequence identify values calculated from another program, and I want to import those values. Thank you in advance for your help, Andrea Showing Sequence Conservation in Chimera<https://www.cgl.ucsf.edu/chimera/data/tutorials/systems/outline.html> Example 2B Chimera session: ConSurf-1hd2-chimera19.py [show this last!] (result of submitting 1hd2 to the ConSurf server and choosing to show results in Chimera; alignment has 150 sequences including that of the query, 1hd2) . Given a protein structure, the ConSurf server estimates the evolutionary conservation of amino acid positions based on the phylogenetic relations between homologous ... www.cgl.ucsf.edu

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Inquiry: Map sequence conservation onto a protein structure
by Gomez Barillas, Andrea 13 Jan '23

13 Jan '23

Dear ChimeraX developers, I am trying to map sequence conservation onto a protein structure. I am using ChimeraX version (version 1.4 (2022-06-03). For this purpose, I was trying to use a tutorial from 2014 for Chimera for Mapping Sequence Conservation onto Structures (Showing Sequence Conservation in Chimera (ucsf.edu)<https://www.cgl.ucsf.edu/chimera/data/tutorials/systems/outline.html>). It seems that some the tools mentioned in this tutorial are no longer available, or maybe work differently. Specifically, the tutorial's "Case 4" (calculating values outside of Chimera but showing them in Chimera) has you set an attribute, and then render/color the structure based on the attribute. The Tools > Structure Analysis > Define attribute mentioned in the tutorial is no longer available. I was as able to assign values directly to structure residues in a text file and read it in using the command defattr instead. The next step would be to use the tool Render by Attribute for coloring but I cannot find this option anymore. Is there a different command I can use for this step, or a new functionality built into ChimeraX I could use for my purpose of mapping sequence conservation onto the structure? One relevant point is that I already have my sequence identify values calculated from another program, and I want to import those values. Thank you in advance for your help, Andrea

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ChimeraX Log window remains blank
by Scott White 13 Jan '23

13 Jan '23

Hi, Sorry if this is a dumb question, but recently when starting ChimeraX the Log window is not on Display. Opening the Log window (Tools> log) opens it as a separate window, and whether docked or free-floating the Log window remains blank no matter what I do. Even just "open 1nov" on the command line will download and open the PDB entry 1NOV, but no text appears in the Log window. I've tried a fresh install of ChimeraX 1.5 to no avail. I've tried opening an older version of ChimeraX, which despite having worked countless times before, now shows the same behaviour regarding the Log window as my abberant ChimeraX 1.5. I've tried rebooting the computer - no fix. I've tried "log clear" and "log show". It's a Windows 10, university owned PC. I don't have the issue on other computers. Is it a software clash? Thanks in advance for any help or advice. Scott _______________________________________ Dr Scott A. White SFHEA School of Biosciences, Room T716 University of Birmingham, B15 2TT E: s.a.white(a)bham.ac.uk<mailto:s.a.white@bham.ac.uk> T: +44-(0)121-414-7534 Office Hours Generally Tues 10am - 11am, Wed 3 pm - 4 pm Please contact me for an appointment. ______________________________________

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Changing MD trajectory default frame rate
by Visvaldas K. 12 Jan '23

12 Jan '23

Dear all, Is there a way to change frame rate when I hit that red "record" button when playing MD trajectory? I could do "movie record", but then it becomes interactive (I hit triangle "play", and then "movie encode /Users/visvaldas/Desktop/movie.mp4 framerate 5"), so inadvertently can record some undesired frames. Of course I probably can reduce framerate using external programs, but how to that non-interactively in ChimeraX? Best regards, Vis

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How to integrate ChimeraX with phenix
by Suresh K 12 Jan '23

12 Jan '23

Hi, We integrate pymol and coot with phenix but unable to integrate ChimeraX. In internet we found that you using ChimeraX with phenix. Could you help us with way to integrate ChimeraX with phenix? Thanks and regards, Suresh K

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Select complelementary of range
by Pranav Shah 12 Jan '23

12 Jan '23

Hi Team, How do I go about selecting everything that does NOT lie between a given range of residues? For instance I want to select everything that is NOT r.410420. Best, Pranav -- Pranav Shah Postdoctoral Research Fellow. Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford OX3 7BN, UK

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Smooth MD trajectory during moovie making
by Enrico Martinez 12 Jan '23

12 Jan '23

Dear Chimera-X users! I am trying to make a movie using MD trajectory (in multi-model pdb file) by means of the Molecular Dynamics Viewer (v 1.2). is it possible to introduce smooth effects on the snapshots transition in the same way like it could be done via V*D ? Many thanks in advance Cheers Enrico

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Trouble displaying missing structure dashed lines in cartoon mode
by Jonathan Jih 12 Jan '23

12 Jan '23

Hello ChimeraX team, I'm having quite a bit of trouble displaying missing structure dashed lines when my models are shown in cartoon mode. This is despite the "missing structure" sub-model box being ticked in the model panel. I recall finding a workaround for this nearly a year ago on ChimeraX 1.3, but I cannot for the life of me remember how I did so (now using ChimeraX 1.5). Interestingly, old sessions that I saved in 1.3 and 1.4 with whatever workaround I applied back then display the missing structure dashed lines properly in 1.5. However, opening the exact same pdb files from those older sessions in 1.5 yields no dashed lines in cartoon mode. Full atom mode appears fine. I also found this thread ( https://www.rbvi.ucsf.edu/pipermail/chimerax-users/2022-February/003273.html) which seems to indicate the issue has been fixed, so not sure if I'm just doing something wrong? My OS is Windows 11 if that matters. Thanks in advance for the help! Jonathan -- Biochemistry, Biophysics, and Structural Biology (BBSB) Molecular Biology Institute, University of California, Los Angeles

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Saving .mrc volume as coordinates
by Joshua Jenkins 10 Jan '23

10 Jan '23

Hi, I've segmented a tomogram using EMAN2 neural network workflow. I then use the segger function to extract regions of interest within the segmented volume, and save these to .mrc. I wondered if there is a way in chimera, or chimeraX, to convert/extract/save the .mrc volume as a simple 3D coordinates file (txt or tbl)? Best wishes, Josh

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