February 2022 - ChimeraX-users - RBVI Mailing Lists

Change default palette for sequential coloring?
by Oliver Clarke 03 Feb '22

03 Feb '22

Hi, I really like the option to use custom palettes from colorbrewer etc in ChimeraX for sequential coloring. Would it be possible to allow users to change the palette used as the default for sequential coloring? E.g. I really like "RdYlBu-5 (3-11)", but I can never remember the name or syntax, and for quick jobs I would love to be able to to set the default coloring scheme so it is just set up the way I like it. Cheers Oli

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Coloring Chains Sensitive to Case After Combine
by Anderson, Jacob 03 Feb '22

03 Feb '22

Dear ChimeraX, Really loving the implementation of the combine command in 1.3! After using the combine command to create a model with >30 chains, the resultant model has some chains with the same chain ID but with a lowercase (i.e. #6/D and #6/d are in the model). When I color #6/D (i.e. color #6/D green), this also is coloring chain #6/d. Is this the expected behavior? When I read help:user/commands/atomspec.html it seems that the chain identifier should be case sensitive if both upper and lowercase chain IDs are present. Curious if there is a way to force the case sensitivity.

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"Backbone N-H atoms” as Ball & Stick representation
by Gupta, Arun 02 Feb '22

02 Feb '22

Hello Elaine and team, I am working with Chemical shifts based CS-Rosetta generated NMR structural model of the protein (amino acid sequence 1-84). And, I would like to show the “backbone N-H atoms” in the NMR structural model in a ball & stick representation. The series of command which I have used are as follows Open pdb cartoon suppress false sel #1:1-84 @n,h And finally from ChimeraX GUI interface, I am choosing following set of options Action/Atom style/ Ball & Stick. But nothing happens. It seems I am missing something. Please suggest the way around with this problem. Thanks! Arun Arun Gupta PhD, MRSC Research Fellow Challis & Lewandowski Group Chemistry Department University of Warwick Gibbet Hill Road Coventry CV4 7AL United Kingdom

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Default Save Location
by William Wang 02 Feb '22

02 Feb '22

Hi ChimeraX Team. Is there anyway to set the default location for the save command as somewhere other than desktop? Thank you William Wang Undergraduate Student Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows

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Building ChimeraX Bundle
by Zeng, Katie 01 Feb '22

01 Feb '22

Dear ChimeraX Users, I'm currently working on a bundle for building lipid membranes and I have a few questions: 1. A part of my bundle is a lipid selector that works with AMBER-compatible pdb files. I followed the tutorial and have successfully built a selector that selects all lipids of the type I specify (say, I put in the command line 'sel POPC' then all the POPCs in the membrane get highlighted). Because of the way AMBER lipid forcefields work, individual lipids are separated into three residues, one head and two tails. I'm trying to add a function to my bundle such that individual lipids can be selected - e.g. when I select a headgroup and go [up]+[up], then the entire lipid can be selected. How can I group three residues together in a bundle? 2. Is it possible to register multiple selectors through a single function? There are many lipids that I want to include in the selector, but for now I have to copy the same function over and over if I want to do that. It will be great if I could have a list containing all the names of the lipids and have a function that registers all of them. 3. Are there any built bundles that are open source? I tried to access the source code of bundles after installing them but I couldn't find the directory of which they are stored. It will be really helpful if I could refer to them. Thank you so much for your help! Best Regards, Katie

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ChimeraX-users February 2022