May 2022 - ChimeraX-users - RBVI Mailing Lists

An error opening chimerax seesion
by Yehuda Halfon 11 Mar '26

11 Mar '26

Hi all, I'm using chimeraX 0.8 (2018-12-17) on centos 7 (can't remember the build). Sometimes when I load a session that was saved using this version of chimeraX it gives me this error: Unable to restore session, resetting. Traceback (most recent call last): File "/software/graphics/chimerax/lib/python3.6/site-packages/chimerax/core/ session.py", line 593, in restore obj = sm.restore_snapshot(self, data) File "/software/graphics/chimerax/lib/python3.6/site-packages/chimerax/ std_commands/view.py", line 214, in restore_snapshot for k,v in data ['view attrs'].items(): TypeError: 'NoneType' object is not subscriptable After that I can't open the session again, so I need to remake it. Help, Yehuda Halfon

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ISOLDE and secondary structure restraints
by Guido Hansen 02 Mar '26

02 Mar '26

Hi all, I just started model building in cryoEM maps and get great results using ISOLDE on AlphaFold2-derived initial models. I have a question which is mainly directed to Tristan I guess: Is is possible to use the command line/script to apply secondary structure restraints in ISOLDE? I would like to restrain the initial secondary structure assignment from Alphafold especially at resolution worse than 3.5 A. At the moment I select each and every residue range assigned to helix, parallel or antiparallel beta-strand one after the other and turn on the corresponding restrains in the ISOLDE GUI. Is there a better way via command line of script? Cheers, Guido -- PD Dr. Guido Hansen Group Leader UNIVERSITÄT ZU LÜBECK INSTITUT FÜR BIOCHEMIE Tel +49 451 3101 3122 Fax +49 451 3101 3104 E-Mail hansen(a)biochem.uni-luebeck.de www.biochem.uni-luebeck.de [1] Ratzeburger Allee 160 23562 Lübeck Links: ------ [1] http://www.biochem.uni-luebeck.de

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Focus in ChimeraX
by Luca Pellegrini 10 Oct '25

10 Oct '25

Hi, What is the ChimeraX equivalent to the Focus command in Chimera? I have selected a portion of a structure, and would like to bring it into focus without dragging it into view. Also Focus would automatically set the selection as the pivot point. Best wishes, Luca Luca Pellegrini, PhD Department of Biochemistry University of Cambridge Cambridge CB2 1GA lp212(a)cam.ac.uk

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Surface dust command in the .cxc script
by 李泽 24 Feb '25

24 Feb '25

Hi all: I'm trying to use the .cxc script to run the software, I found that the "surface dust" command has never been executed in it. Have anyone met the same problem? Any suggestions. Thank you all. Best, Ze

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Get color code of a custom color
by Ahmad Khalifa 11 Feb '25

11 Feb '25

I created a custom color that I want to use in a different session. is there a way to do that besides trying to match colors by eye? Regards.

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Double and Triple Bond Stick Style
by Smith, Chase 05 Feb '25

05 Feb '25

Dear ChimeraX, I was just wondering why there is no way to represent a double or triple bond in either the ligands or the protein amino acids when viewing as a Stick or Ball-and-Stick representation? I sometimes use Chimera or ChimeraX to make visuals for my lectures, and the students often have difficulty in understanding due to the absence of the multiple bonds. I would love to have the ability to represent the double or triple bonds with multiple lines between the atoms. Thank you, Chase Smith ... ChaseSmith, PhD Chair, Department of Pharmaceutical Sciences & Associate Professor of Medicinal Chemistry School of Pharmacy MCPHS University 19 Foster Street | WorcesterMA01608 T 508.373.5717F 508.890.5618C 978.855.7203 chase.smith(a)mcphs.edu www.mcphs.edu MCPHS University Confidentiality Note: This e-mail, and any attachment to it, is intended to be confidential and might be legally privileged. It is intended solely for the use of the addressee. If you are not the intended recipient, you are hereby notified that reading, copying, disseminating or distributing this email is strictly prohibited. If you have received this e-mail in error, please immediately return it to the sender and delete it from your system. Thank you.

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Quest 2 Support?
by Blaine Hewitt 27 Dec '24

27 Dec '24

Hello, my name is Blaine Hewitt. Now I know that you have stated previously that you have no intention of bringing support to the Oculus Quest. Which is completely understandable since I know that not only would you have to develop around a completely new Operating System but another CPU architecture and much much more I assume. But with the soon release of the Oculus Quest 2 and it's new XR 2 chip-set makes a pretty good argument for it. As this would allow for much easier use in education (as is what I am attempting to do with it). I think it will be even easier now to push updates with SideQuest <https://sidequestvr.com/> being relatively simple to setup. I know that another (Naome <https://blog.matryx.ai/nanome-on-quest-public-beta-is-now-available-b546321…>) program is already available on the platform. But I do like your program a lot more since it is able to be used for free unlike Nanome Pricing <https://nanome.ai/pricing/> which is... as to say unappealing to public schools (such as mine). I was was also thinking (sorry if I am becoming annoying at this point) that if you do make a version of the Quest that you could make that GitHub branch available to the public. As for example while I may not be great at understanding complex protein structures I can help to make the whole experience more user friendly. Anyways if you read this far thank you for taking time from your day to read this. If you want to know who I am, my name is Blaine I am in my senior year of High School (Waynecsd <https://wh.waynecsd.org/>). I have to do a project by the end of the year where I have to present an area of study I want to pursue and I decided to research the effects of VR on the human's ability to learn and retain information. Budget..... None

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Re: [chimerax-users] Assembling 2 proteins
by Elaine Meng 27 Jul '22

27 Jul '22

Hi Tata Santosh Rama Bhadra Rao, I already gave my suggestions in the previous message, so there is not really anything else I can do to teach you. Since you didn't give the details of all the steps that you tried and which step(s) gave results you didn't like, I can't tell you how to do it differently. My only idea is to go back to what I already suggested: you could use Matchmaker if you already had a pentamer, which you show in the bottom figures. So, following the instructions in my first reply, maybe you can take the chains shown in the top figures and match them onto the chains in the bottom figures to make the pentamer. However, that will only work if the proteins are very similar. If you did it already and it gave the bad result, maybe these proteins are not similar enough to use that approach. Best, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco > On May 30, 2022, at 9:22 PM, SANTOSH RAMA BHADRA RAO TATA <19807877(a)students.latrobe.edu.au> wrote: > > Hi Elaine, > > I tried doing and it came out like this. Final 2 figures are homomeric pentamers. First 2 are heteromers with 3A subunits (A, B, D chains) and 2D (C, E chains) subunits. Could you please help me or teach me assembling them properly. > > Thanking you, > > With best wishes, > Tata Santosh Rama Bhadra Rao, > PhD Scholar, > C/O Prof Helen Irving, > La Trobe university, > Bendigo, Vic-3550, > Australia. > Email: 19807877(a)students.latrobe.edu.au; > S.Tata(a)latrobe.edu.au > Phone: 0499263974 > From: Elaine Meng <meng(a)cgl.ucsf.edu> > Sent: Wednesday, 25 May 2022 2:08 AM > To: SANTOSH RAMA BHADRA RAO TATA <19807877(a)students.latrobe.edu.au> > Cc: chimerax-users(a)cgl.ucsf.edu <chimerax-users(a)cgl.ucsf.edu> > Subject: Re: [chimerax-users] Assembling 2 proteins > > Hello Tata Santosh Rama Bhadra Rao, > It all depends on what information you have already. If you don't know how the pentamer is supposed to look (how the proteins fit together), then there may not be enough information: ChimeraX is not going to predict the pentamer structure for you. > > You said "5 different proteins" which I interpret to mean they are not 5 copies of the same thing, that it is a heteropentamer and not a homopentamer. If they were 5 copies of the same thing (homopentamer), then you might be able to use the "sym" command to build it from one copy, if the input file contains symmetry matrices in the header, or you know the symmetry and can specify it separately: > <https://rbvi.ucsf.edu/chimerax/docs/user/commands/sym.html> > > Otherwise: > You would only use Matchmaker if you also have an already-known structure of a similar pentamer. Then you would open the structure of that pentamer, open the structures of your five proteins (if the same one is multiple copies in the pentamer, you would open it multiple times), and then match each one of them to the similar subunit of the known pentamer. In other words, you would open 6 different PDB files and then use Matchmaker 5 times, once to match each of your proteins to the corresponding subunit of the pentamer. > > Just start Matchmaker (menu: Tools... Structure Comparison... Matchmaker) and in that dialog's Chain Pairing, choose "Specific chain(s) in reference structure with specific chain(s) in match structure". Choose one of your protein chains as the match structure and choose the corresponding chain in the known pentamer as the reference. Apply. Repeat with your second protein chain, etc. > > Here is the Matchmaker help with detailed explanations of all the options: > <https://rbvi.ucsf.edu/chimerax/docs/user/tools/matchmaker.html#top> > > I hope this helps, > Elaine > ----- > Elaine C. Meng, Ph.D. > UCSF Chimera(X) team > Department of Pharmaceutical Chemistry > University of California, San Francisco > > > > > > On May 23, 2022, at 9:49 PM, SANTOSH RAMA BHADRA RAO TATA via ChimeraX-users <chimerax-users(a)cgl.ucsf.edu> wrote: > > > > Hi, > > > > I would like to create a pentamer, how can I assemble 5 different proteins subunits into a pentamer. I was trying to use matchmaker but I couldn't. can you please help me with some video how to get in use it or if there is any other way to use the software and create pentamer please let me know. > > > > Thanking you, > > > > With best wishes, > > Tata Santosh Rama Bhadra Rao, > > PhD Scholar, > > C/O Prof Helen Irving, > > La Trobe university, > > Bendigo, Vic-3550, > > Australia. > > Email: 19807877(a)students.latrobe.edu.au; > > S.Tata(a)latrobe.edu.au > > Phone: 0499263974

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How to show fib-sem tomography data as solid volume
by Edoardo D Imprima 23 Jun '22

23 Jun '22

Hello, Could you please tell me how to display fib-sem tomography data as a compact volume that can be navigated by sliding planes? The data consists of a series of frames that I can convert as .mrc volume or .mrcs stack. I attach a snapshot taken from a review that illustrates (middle panel) the visualisation I would like to obtain. The medical-image panel in ChimeraX is very handy however, the “full” option shows the volume while I need to display the planes of each side to slice through them. Looking forward to your feedback, Best wishes, Edoardo ------------------------------------------------------ Dr. Edoardo D'Imprima Postdoctoral fellow Structural and Computational Biology Unit EMBL Heidelberg - Mahamid Group Meyerhofstraße 1 69117 Heidelberg Germany Phone: +49 6221 387-8531

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Licensed software source
by Jeya Priya Senthilkumaran 07 Jun '22

07 Jun '22

Hi Community, To use ChimeraX licensed software. I have few queries Do we have a separate source {tar file} to be downloaded or the same source from https://www.cgl.ucsf.edu/chimerax/download.html should be used? While purchasing the license, will we be provided with separate source to download the software? We have bought license, now we need to upgrade to newer version of ChimeraX ,do we have instructions to upgrade to the newer version? In case, we have installed open source of the software, how should we upload the license to the ChimeraX? Kind Regards, Jeya Priya Scientific Cloud Computing [cid:image001.png@01D874F0.89D1F100]<https://www.zifornd.com/> [cid:image002.png@01D874F0.89D1F100] M +91 8098223555 [cid:image003.png@01D874F0.89D1F100] www.zifornd.com<http://www.zifornd.com/> [cid:image004.png@01D874F0.89D1F100] IST (Time Zone) [cid:image005.png@01D874F0.89D1F100] Follow us on [cid:image006.png@01D874F0.89D1F100]<https://www.linkedin.com/company/zifo-technologies/> ******************* CAUTION ******************* This e-mail is intended exclusively for the individual(s) to whom it is addressed and may contain information that is PRIVILEGED and CONFIDENTIAL. If you are not the intended recipient, please notify the sender and delete the original message. Further, you are not to copy, disclose or disseminate this e-mail or the information contained to any other person and any such actions are unlawful. Zifo Technologies has taken every reasonable precaution to ensure that this e-mail and attachment(s) has been swept for viruses, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment(s). Zifo Technologies is neither liable for the proper and complete transmission of the information contained in this e-mail nor for any delay in its receipt. *************************************************

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