Thank you for answering this side of my question, I now have a small deviation to take in my approach thanks to Elaine C. Meng who clarified to me the value on the probability parameter. Have a great day, Robert Noé ________________________________ De : Eric Pettersen <pett@cgl.ucsf.edu> Envoyé : mardi 3 janvier 2023 18:26 À : Noe Robert <noe.robert@etu.univ-cotedazur.fr> Cc : chimera-users@cgl.ucsf.edu <chimera-users@cgl.ucsf.edu> Objet : Re: [Chimera-users] Question concerning rotamer choosing To answer the Python side of this, chimera.Rotamers.getRotamers(residue) gets a list of rotamers (really Molecule instances) for that residue (Dunbrack library by default). Each of those Molecule instances has a 'rotamerProb' attribute, which is the value you see in the graphical user interface. You apply the rotamer you want by calling chimera.Rotamers.useRotamer(residue, rotamers) where rotamers is a list of rotamers to apply, probably just one (at a time) in your case because if you supply multiple rotamers then they will all be used by putting each one in a different alternate location. --Eric Eric Pettersen UCSF Computer Graphics Lab On Jan 2, 2023, at 6:26 AM, Noe Robert via Chimera-users <chimera-users@cgl.ucsf.edu<mailto:chimera-users@cgl.ucsf.edu>> wrote: Hi, I'm currently trying to write a python script which automatizes mutageneses on Chimera 1.16, and calculates clashes inducted by the change of amino acid through a local minimization (which explains why I'm using Chimera instead of ChimeraX). I would like to choose which rotamer to use depending on their probability from the rotamer library Dunbrack (for instance, when probability is >0.1), which is visible on the "Rotamers graphical user interface". Is there a way to extract these probability values using a script, in order to run it on a certain number of rotamers ? That way it would be quite automated. On Jul 1, 2015, Eric Pettersen advised to modify the "Python script that uses the functions in the Rotamers module" (here<https://www.cgl.ucsf.edu/pipermail/chimera-users/2015-July/011193.html>), but I don't which one it is. Thank you, Noé Robert, Fifth-year student in bioengineering, minor in Bioinformatics and Modelling, at engineering school Polytech Nice Sophia, France Phone : +33 7 81 00 52 02 "let's limit the use of our resources and lighten our mails" _______________________________________________ Chimera-users mailing list: Chimera-users@cgl.ucsf.edu<mailto:Chimera-users@cgl.ucsf.edu> Manage subscription: https://www.rbvi.ucsf.edu/mailman/listinfo/chimera-users