- ChimeraX-users - RBVI Mailing Lists

Re: [chimerax-users] saving multiple .obj files from a morph
by Elaine Meng 09 Jun '21

09 Jun '21

On Jun 9, 2021, at 3:38 AM, Brett Murrah <murrahx5(a)att.net> wrote: > I’m trying my best to use the perframe command to save each frame / model out from a morph and slider animation after morphing some pdbs. It is exporting something.. but only 1k files. I’m not sure what I’m doing wrong. Any help? My command is this: > > perframe "save D:/Projects/OBJs/model$1.obj model #3.$1" frames 10 > > PS, I put model #3 because the ID’s for 1 and 2 are the models I used for the morphs. The final morph is #3. If I export each slider frame by hand.. that seems to work. Trying to automate it best I can. > > Thanks you for any help! > Brett Hi Brett, I'm guessing you meant to send this to chimerax-users(a)cgl.ucsf.edu (CC'd here, the recommended address for questions). The morph #3 is a trajectory model. It does not have the frames as submodels #3.1, 3.2, ... so your save command doesn't make sense. I don't know what you mean by "1k files" either... do you mean it makes 10 files but they are too small? You would use "perframe" in combination with "coordset" to replay the existing morph trajectory. E.g. put something like this into a command file (plain text named something.cxc) and then open it in ChimeraX: perframe "save D:/Projects/OBJs/model$1.obj models #3" coordset #3 1,10; wait 10 ~perframe <https://rbvi.ucsf.edu/chimerax/docs/user/commands/coordset.html> <https://rbvi.ucsf.edu/chimerax/docs/user/commands/perframe.html> <https://rbvi.ucsf.edu/chimerax/docs/user/commands/save.html> The reason I say to put it in a command file is to make the commands execute instantly one afer the other. I expected it to work when I entered them all as one long line in the command line (with semicolon separators) but then I got a parsing error, possibly due to a bug. E.g. I tried entering this as one long line (the mail tool may choose to break it up): perframe "save D:/Projects/OBJs/model$1.obj models #3"; coordset #3 1,10; wait 10; ~perframe ... but that gave an "incomplete quoted text" error which I will report as a bug. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

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Change default volume display settings?
by Oliver Clarke 08 Jun '21

08 Jun '21

Hi, Is there any way in ChimeraX to change default volume display settings? For example, I would like to set all volumes to "step 1" by default - in Chimera I can set these defaults in the Volume Viewer menu but I can't see an equivalent in ChimeraX. Sort of related - I wonder if it would be possible to have the option to set default display preferences for molecules or maps? Or more generally, have a script that executes when a file of a particular type is loaded - similar to how the startup commands are executed when ChimeraX is started, but triggered by the opening of a particular filetype and applied to that particular model? Cheers Oli

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Surface Coloring
by Juliana Glavina 07 Jun '21

07 Jun '21

Dear All, I am moving from Chimera to ChimeraX and I am trying to reproduce some of things that I used to do in Chimera. I managed to colour the surface by the kdHydrophobicity scale. However, the coloring is discrete with sharp edges between the residues. I was wondering if it was possible to smooth the edge between two different colors on the surface - similar to mlp but with customized attributes. Thank you very much in advance UCSF ChimeraX version: 1.2.3 (2021-05-13) Ubuntu 20.04 Juliana

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Re: [chimerax-users] Unit cell orientations
by Elaine Meng 04 Jun '21

04 Jun '21

> On Jun 4, 2021, at 10:39 AM, Silva, Chinthaka Mahesh <silva228(a)llnl.gov> wrote: > > Hi Elaine, > Is it possible to orient a unit cell along different axes in ChimeraX? I tried using ‘Unit cell’ option, but not sure if this is the correct place to do it. > Thanks! > -chinthaka Hi Chinthaka, (CC to chimerax-users(a)cgl.ucsf.edu ... please use that address for ChimeraX questions) Sorry, I don't understand the question. You can build the unit cell or a block of multiple unit cells with the Unit Cell tool: <https://rbvi.ucsf.edu/chimerax/docs/user/tools/unitcell.html> The axes of the unit cell are defined in the data... it is not something that you control. Of course, you can rotate it after you build it. Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

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Consultation about developing plug-ins in ChimeraX
by Chen, Xiang 28 May '21

28 May '21

Dear Sir or Madam, I am a graduate student in the Department of Computer Science at the Memorial University of Newfoundland. I am currently engaged in developing and researching VR applications to visualize biological microstructures. I learned that Chimerax is a relatively mature piece of software, containing many excellent functions and features. So I'd like to know: 1. Is ChimeraX completely open-source and free? I will only use it for research and non-profit purposes. 2. If ChimeraX is open source, is there a description or summary of the structure/principles of the source code? (In order to learn what features are implemented by each code file.) 3. May I develop new plug-ins/bundles/modules based on ChimeraX's VR mode to implement one or more new features/functions? Could you please briefly describe the feasibility of developing it? Best regards, Xiang Chen --- Xiang Chen, M.Sc. # 201992538 Department of Computer Science Memorial University of Newfoundland St. John's, NL, Canada T (709) 219-2960 / E xiangc(a)mun.ca

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Structure move
by Silva, Chinthaka Mahesh 28 May '21

28 May '21

Hello, If I have more than one structure opened in ChimeraX and want to move them apart, can I do that? I see that I can move a structure model using 'right mouse' option, but not the structures. Chimera had the option to do this by deactivating a structure. Thanks! -chinthaka

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Pair-fitting in ChimeraX
by Rachael Coleman 28 May '21

28 May '21

Hello again, You guys were so helpful last time I figured I'd just ask for help again! I'm trying to do something that I know is a feature in PyMol but I'm not sure if it is a feature in ChimeraX (yet). In PyMol, there is a function to pair fit over specific atoms between two different structures. I have tried using the Matchmaker tool in ChimeraX to do this, but I think the dilemma is I'm trying to align the protein relative to the position of specific atoms in a heme cofactor across two different structures and that isn't something in the primary sequence of the protein. I also could just be doing something wrong in the matchmaker process. Do you know if there is an easy way to accomplish this in ChimeraX? Best regards, Rachael Coleman -- *Rachael E. Coleman* PhD Candidate, Lancaster Group Department of Chemistry and Chemical Biology Cornell University Ithaca, NY 14853 Pronouns: She, her, hers

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ChimeraX version 1.2 released!
by Elaine Meng 28 May '21

28 May '21

UCSF ChimeraX version 1.2 has been released! Major changes since v1.1 (Aug 2020) include: - Surface Color tool - Unit Cell tool - Color Key tool and command - Crystal Contacts tool and command - volume tools: Hide Dust, Color Zone, Surface Zone - Meeting panel for multiperson VR - "fly" command for smooth motion along multiple saved views - "rmsd" command for calculating RMSD in current positions (w/o fitting) - nucleic-acid building - bond deletion/addition - UniProt fetch includes sequence feature annotations (domains, mutations, modification sites, etc.) - support for Amber netCDF trajectories - smaller session files - faster saving of sessions with maps - mouse mode for moving a clicked model without having to select it For more details, see the ChimeraX change log: https://www.rbvi.ucsf.edu/trac/ChimeraX/wiki/ChangeLog Downloads: https://www.rbvi.ucsf.edu/chimerax/download.html

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Downloading Daily builds
by Moradkhan, Tiglath A 27 May '21

27 May '21

Hi, I don't know why the Fetch Additional Scores button is not returning these scores. I get the message that scores have been initiated but then nothing happens. It's annoying that I keep have to download newly released daily builds on my computer, so I can use it. Thank you Tiglath

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Web services down
by Eric Pettersen 25 May '21

25 May '21

Hi all, Due to computing cluster maintenance starting this evening (5/25) through tomorrow evening (5/26), the web services in Chimera and ChimeraX that use our cluster will be down. The frequently used web services are BLAST and Modeller for both programs, and for Chimera only: sequence realignment via Clustal Omega or MUSCLE; SAXS2; and 2D ligand depiction. --Eric Eric Pettersen UCSF Computer Graphics Lab

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