- ChimeraX-users - RBVI Mailing Lists

movie encode bug on Rocky Linux 8.4
by Guillaume Gaullier 30 Sep '21

30 Sep '21

Hello, This time I am reporting what looks almost certainly like a bug. Using ChimeraX version 1.2.5 on Rocky Linux 8.4 (installed from the RHEL/CentOS 8 RPM package), I get the following error in the Log when trying to use the movie encode command (I attached a copy of the full error message in the Log): /usr/libexec/UCSF-ChimeraX/bin/ffmpeg: error while loading shared libraries: libbz2.so.1.0: cannot open shared object file: No such file or directory Turns out I definitely have libbz2 on my system, but not under the filename ChimeraX (or ffmpeg bundled with ChimeraX) is looking for: $ ls -l /usr/lib64/ | grep libbz2 lrwxrwxrwx. 1 root root 11 Apr 7 03:44 libbz2.so -> libbz2.so.1 lrwxrwxrwx. 1 root root 15 Apr 7 03:44 libbz2.so.1 -> libbz2.so.1.0.6 -rwxr-xr-x. 1 root root 73008 Apr 7 03:44 libbz2.so.1.0.6 If I create a symlink to libbz2.so.1.0.6 and name it libbz2.so.1.0, my movie encode command finishes fine and produces a movie file. So it was easy to work around this problem, but obviously it would be a lot better if it worked out of the box and the user did not have to mess with system files as root. Thank you in advance, Guillaume N?r du har kontakt med oss p? Uppsala universitet med e-post s? inneb?r det att vi behandlar dina personuppgifter. F?r att l?sa mer om hur vi g?r det kan du l?sa h?r: http://www.uu.se/om-uu/dataskydd-personuppgifter/ E-mailing Uppsala University means that we will process your personal data. For more information on how this is performed, please read here: http://www.uu.se/en/about-uu/data-protection-policy

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Trackpad scaling causes unintended rotation
by Oliver Clarke 29 Sep '21

29 Sep '21

Hi, In recent versions of ChimeraX (I don't think it always did this but can't be 100% sure), when one uses pinch-to-zoom on the trackpad to scale the view, this also changes orientation, causing quite a large and unintended rotation which can be a bit disconcerting. Comparing directly with Chimera using the same model, this does not happen in Chimera. Is there some difference in how the Chimera vs X are interpreting competing trackpad gestures, and could this be adjusted in ChimeraX? Because two fingers can be used both to scale and rotate... Chimera seems to be able to figure out which the user is intending, while ChimeraX presently applies both at the same time. Cheers Oli

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Possible to measure the shortest distance between two models?
by Vorländer,Matthias Kopano 28 Sep '21

28 Sep '21

Dear all, I am interested in measuring the shortest distance between two models (PDBs) without a priori knowledge of which atoms will be the closest ones. I am planning to do this for a large number of model pairs, therefore it would be great if this would be scriptable. Is this possible using ChimeraX? Thanks a lot in advance, Best, Matthias

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Have a map move with its model
by Bullitt, Esther 28 Sep '21

28 Sep '21

Hi, I renamed my map and model to be #9.1 and #9.2, thinking this would make them move together. However, when I used matchmaker to match the model to align it to another model, only the model moved and the map did not. To start with, I used fitmap #9.1 inMap #9.2, but now the model is elsewhere. If I go back and do fitmap again, it moves the wrong thing (I want to put the map where the model is now, not vice versa). Is there something I am missing, or is there a different way to do this? Thanks very much. Sincerely, Esther

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Flat transparency setting absent
by David William Kastner 27 Sep '21

27 Sep '21

ChimeraX community, I noticed that in ChimeraX, the “flat” transparency option that was present in Chimera has been either moved or renamed in ChimeraX. This setting made it so the transparency setting wasn’t overwhelming/distracting when focusing on details. In Chimera, it is accessed with Tools > Viewing controls > Effects > transparency > flat. Does anyone know how to achieve this effect in ChimeraX? I find the default ChimeraX transparency option to be disorienting when visualizing details. Here is a rendering comparing the two rendering styles with and without “flat” option. I look forward to your thoughts! https://www.dropbox.com/s/xrjyjnzegeeltap/transparency_comparison.png?dl=0 David --- David Kastner Ph.D. student | Bioengineering MIT | Kulik Lab kastner.io

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Error on installing isolde
by benhaijing＠sina.com 27 Sep '21

27 Sep '21

Hi all！ I can’t install the plugin isolde using command 'toolshed install isolde'. Looking in indexes: https://pypi.org/simple, https://cxtoolshed.rbvi.ucsf.edu/pypi/ Requirement already satisfied: ChimeraX-ISOLDE==1.2.2 in c:\users\dell\appdata\local\ucsf\chimerax\1.2\site-packages (1.2.2) Requirement already satisfied: ChimeraX-AtomicLibrary~=3.1.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-ISOLDE==1.2.2) (3.1.3) Requirement already satisfied: ChimeraX-Core~=1.2.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-ISOLDE==1.2.2) (1.2.5) Requirement already satisfied: ChimeraX-Arrays~=1.0.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-ISOLDE==1.2.2) (1.0) Requirement already satisfied: ChimeraX-Clipper~=0.16.0 in c:\users\dell\appdata\local\ucsf\chimerax\1.2\site-packages (from ChimeraX-ISOLDE==1.2.2) (0.16.0) Requirement already satisfied: ChimeraX-Atomic~=1.13.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-ISOLDE==1.2.2) (1.13.2) Requirement already satisfied: ChimeraX-Nucleotides~=2.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (2.0.1) Requirement already satisfied: ChimeraX-mmCIF~=2.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (2.3) Requirement already satisfied: ChimeraX-ConnectStructure~=2.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (2.0) Requirement already satisfied: ChimeraX-Geometry~=1.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (1.1) Requirement already satisfied: ChimeraX-Graphics~=1.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (1.0) Requirement already satisfied: ChimeraX-PDB~=2.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (2.4.1) Requirement already satisfied: ChimeraX-AtomSearchLibrary~=1.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-ConnectStructure~=2.0->ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (1.0) Requirement already satisfied: ChimeraX-DataFormats~=1.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-mmCIF~=2.0->ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (1.1) Requirement already satisfied: ChimeraX-OpenCommand~=1.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-mmCIF~=2.0->ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (1.5) Requirement already satisfied: ChimeraX-PDBLibrary~=1.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-mmCIF~=2.0->ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (1.0.1) Requirement already satisfied: ChimeraX-SaveCommand~=1.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-mmCIF~=2.0->ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (1.4) Requirement already satisfied: ChimeraX-IO~=1.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-DataFormats~=1.0->ChimeraX-mmCIF~=2.0->ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (1.0.1) Requirement already satisfied: ChimeraX-Surface~=1.0 in c:\program files\chimerax\bin\lib\site-packages (from ChimeraX-Nucleotides~=2.0->ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (1.0) Requirement already satisfied: ChimeraX-UI~=1.0 in c:\users\dell\appdata\local\ucsf\chimerax\1.2\site-packages (from ChimeraX-Nucleotides~=2.0->ChimeraX-Atomic~=1.13.0->ChimeraX-ISOLDE==1.2.2) (1.2.1) INFO: pip is looking at multiple versions of chimerax-pdblibrary to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-pdb to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-opencommand to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-nucleotides to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-io to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-dataformats to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-mmcif to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-graphics to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-geometry to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-core to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-atomsearchlibrary to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-connectstructure to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-clipper to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-atomiclibrary to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-atomic to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-arrays to determine which version is compatible with other requirements. This could take a while. INFO: pip is looking at multiple versions of chimerax-isolde to determine which version is compatible with other requirements. This could take a while. The conflict is caused by: chimerax-nucleotides 2.0.1 depends on ChimeraX-UI~=1.0 chimerax-opencommand 1.5 depends on ChimeraX-UI~=1.0 chimerax-savecommand 1.4 depends on ChimeraX-UI~=1.4 To fix this you could try to: 1. loosen the range of package versions you've specified 2. remove package versions to allow pip attempt to solve the dependency conflict ERROR: Cannot install chimerax-nucleotides==2.0.1, chimerax-opencommand==1.5 and chimerax-savecommand==1.4 because these package versions have conflicting dependencies. ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies WARNING: You are using pip version 21.0.1; however, version 21.2.4 is available. You should consider upgrading via the 'C:\Program Files\ChimeraX\bin\ChimeraX.exe -m pip install --upgrade pip' command. Thanks, Haijing Ben

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Compound Docking in UCSF Chimera
by Ayush Patel 25 Sep '21

25 Sep '21

Sir or Madam; Recently, I was having issues with docking a ligand into a receptor due to surface calculation failures. A quick search told me to use ChimeraX. However, I am not sure how to carry out docking in ChimeraX. Could you please explain how to do this? As a side note, I do currently have AutoDock Vina. Thank you so much, Ayush Patel

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Hi. I have a question about Chimera X program
by dongyoung kim 24 Sep '21

24 Sep '21

Hi. I'm researching protein 3D structure to develop the new drug. In recent, I'm using the Alphafold function in Chimera X daily version. I have 4 questions. First, if I use Alphafold to predict my important project data, is it keep secure privately? I want to keep my data secret. It shouldn't be open to anybody without me. Second, when I using Alphafold in ChimeraX, I faced some error messages that mean 'Not enough disk volume. please remove past data.'. I'm not familiar with google colab...how can I manage the disk to remove past data or expand disk volume? Third, how can I improve the speed of alphafold prediction? ChimeraX shows some resources like ram, disk. fourth, I want to operate simultaneously Alphafold prediction to predict 2 or more structures. Is it possible? If there need some pay to improve the second, third, fourth question, please let me know methods. Many thanks. -from KDY

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Finding Continuous Residue Stretches
by Daniel Wells 23 Sep '21

23 Sep '21

Dear Chimerax Users: I need to find Continuous Residue Stretches between 15-25 amino acids in length on the surface of these two molecules: https://www.rcsb.org/3d-view/4MYV/1 https://www.rcsb.org/structure/3U82 Could anyone here help me perform that function on Chimerax? Thank you for your time. Sincerely, Dan Wells

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Error on save
by Christophe Leterrier 23 Sep '21

23 Sep '21

HI, When I'm saving a session displaying 3D image stacks as surfaces into a csx file, I get this error: TypeError: object of type 'SurfaceUpdaters' has no len() File "/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/chimerax/core/session.py", line 242, in discovery if sm is None and len(value) == 0: However if I switch the displayed stacks as volume, then there is no error on save. This is with the daily build 1.3.dev202109160803 (2021-09-16) on OSX Big Sur (Intel architecture). Thanks, Christophe

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A couple questions about programming in ChimeraX
by William Hofsøy 22 Sep '21

22 Sep '21

Hi, I'm currently working on a plugin that deals with a cmm-file model and have a few questions about how to do certain things. Mainly I would like to be able to modify the model by adding new markers and links to the model. I have managed to figure out how to make new markersets and add them to the session but not how to alter existing ones aka the model that I load from the cmm file. Additionally I am making use of the marker_extra_attributes info since the cmm file im reading has attributes there that I need, but as I read in the documentation these aren't saved in sessions and I wondered if there is a way to do just that. Lastly, I was wondering if it is possible to place any mesh in the scene, for instance a cube. -William

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Re: [chimerax-users] Adding a custom preset question
by Elaine Meng 22 Sep '21

22 Sep '21

Hi Boaz, Just download the file using your standard browser mechanism. When I ctrl-click on the link "kyte-doolittle_hydrophobicity.cxc" in this page: <https://rbvi.ucsf.edu/chimerax/docs/user/preferences.html#startup> ...when viewed in Firefox on Mac, I get a menu that includes "Save link as..." Choosing that brings up a little dialog that I use to save the file (without changing the name, but you can change it if you keep the cxc part) to my desired download location. On other platforms or different browsers it might be slightly different how to get the context menu with the choice to save the file, but should be similar. Or since it is a plain text file, like you said, you can also view contents and then paste them as plain text in a text-editor to create your own cxc file. However it is usually easy just to save the file from the browser as described above. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco > On Sep 21, 2021, at 10:13 PM, Boaz Shaanan via ChimeraX-users <chimerax-users(a)cgl.ucsf.edu> wrote: > > Hi, > You give a nice example of adding the kyte-doolittle_hydrophobicity.cxc to the custom_presets folder that I created, but where can I find this file? Or, should I paste the content of the file which is opened by pressing the link in the user guide into a file by this name ( I doubt it but nevertheless suggest it as a possibility). > Excuse my naive question, please. > Thanks, > Boaz

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color zone colors by atom type
by vincent Chaptal 21 Sep '21

21 Sep '21

Dear ChimeraX users, I just subscribed so apologies if this has been asked before. When is type the command: color zone #2 near #1/A distance 5 sharpEdges false farColor blue I have the volume #2 in blue with chain A colored by atom type: i.e. with carbons in sand, oxygens in red, nitrogens in blue. I tried to follow the tutorial on youtube, downloading the model and emdb like in the tutorial, and it does work like the tutorial, meaning colored by chain. I am wodering what is going on and how to fix it? I've seen this behavior for my protein, on a PDB refined from Phenix, or from a download from the rcsb. I don't see anything special on the PDB, all the atoms are listed normally. Is it possible to assign a specific color per chain using this command? Thank you for your help. best Vincent -- Vincent Chaptal, PhD Director of GdR APPICOM Drug Resistance and Membrane Proteins Lab MMSB -UMR5086 7 passage du Vercors 69007 LYON FRANCE +33 4 37 65 29 01 http://www.appicom.cnrs.fr http://mmsb.cnrs.fr/en/

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Download Speed
by Gulzar Singh 21 Sep '21

21 Sep '21

Dear Chimera Teach team, The download speed of software is less than 200KB/s (mostly 160 KB/s). I tried both Firefox and wget. We have download limit of 11MB/s My location is Pune, India Please have a look at the issue. Regards, Gulzar Singh

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Turning off silhouettes to specific selection
by Abhilash Padvannil 17 Sep '21

17 Sep '21

Hi Is there a way to turn off the silhouettes on specific selections of a model? Thanks Abhilash.

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Remove older ChimeraX Linux
by Nebojsa Bogdanovic 16 Sep '21

16 Sep '21

Hello, I am trying to reinstall the new ChimeraX on the linux system, however my previous incomplete installations are creating problems. I am not sure how to get rid of them and start anew so I would appreciate your help. I can send more context in our next correspondence. Looking forward to hearing from you. Thank you and best regards. Nebojša Bogdanović, Ph.D Department of Physiology and Biophysics, School of Medicine, Case Western Reserve University

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Interface residue selection - command line option?
by Vorländer,Matthias Kopano 15 Sep '21

15 Sep '21

Dear ChimeraX team, I am trying to selected interface residues using the “interface” tool. While doing this through the context menu of the interface plot works, I am analyzing a larger number of PDBs and am therefore looking for a way to achieve this through the command line (the contacting chains are displayed already in the log window. Essentially I wonder if it is possible to expand this to the contacting residues). Thanks a lot in advcance, Matthias

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how to save .pdb file of predicted fusion protein generated by chimerax and alphafold
by Ruby Pelingon 15 Sep '21

15 Sep '21

Hi, I tried using chimeraX and alphafold to predict my fusion protein. The result seems promising and generated a .pdb file. I would like to enquire how to save the .pdb file. I would like to open the .pdb file using pymol. Thank you. Kind Regards, Ruby Pelingon

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Re: [chimerax-users] [ChimeraX] #5218: surface color value on mouseover replaced by chain info in status line
by Elaine Meng 15 Sep '21

15 Sep '21

Hi Boaz, When a bug is reported as fixed, the next successful daily build should contain the fix. Occasionally the fixer might forget to do all the steps to get it in that day, but it is supposed to be in there. Best, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco > On Sep 15, 2021, at 8:14 AM, Boaz Shaanan via ChimeraX-users <chimerax-users(a)cgl.ucsf.edu> wrote: > > Hi Tom, > Thanks a lot. Is this fix already implemented in the Chimerax daily build? > Cheers, > Boaz > > Boaz Shaanan, Ph.D. > Dept. of Life Sciences > Ben Gurion University > Beer Sheva, Israel > > On 14 Sep 2021 17:26, ChimeraX <ChimeraX-bugs-admin(a)cgl.ucsf.edu> wrote: > #5218: surface color value on mouseover replaced by chain info in status line > ----------------------------------+------------------------- > Reporter: Elaine Meng | Owner: Tom Goddard > Type: defect | Status: closed > Priority: high | Milestone: > Component: UI | Version: > Resolution: fixed | Keywords: > Blocked By: | Blocking: > Notify when closed: | Platform: all > Project: ChimeraX | > ----------------------------------+------------------------- > Changes (by Tom Goddard): > > * status: assigned => closed > * resolution: => fixed > > > Comment: > > Fixed. > > Made surface value status message suppress chain description status > messages on mouse hover. > > -- > Ticket URL: <https://www.rbvi.ucsf.edu/trac/ChimeraX/ticket/5218#comment:3> > ChimeraX <https://www.rbvi.ucsf.edu/chimerax/> > ChimeraX Issue Tracker > _______________________________________________ > ChimeraX-users mailing list > ChimeraX-users(a)cgl.ucsf.edu > Manage subscription: > https://www.rbvi.ucsf.edu/mailman/listinfo/chimerax-users

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Fwd: Display of actual values of APBS electrostatic potential projected on protein surface
by Boaz Shaanan 13 Sep '21

13 Sep '21

Boaz Shaanan, Ph.D. Dept. of Life Sciences Ben Gurion University Beer Sheva, Israel ---------- Forwarded message ---------- From: בעז שאנן <bshaanan(a)bgu.ac.il> Date: 9 Sep 2021 17:39 Subject: Display of actual values of APBS electrostatic potential projected on protein surface To: ChimeraX-users-request(a)cgl.ucsf.edu Cc: Hi, Is there a way in Chimerax to know the actual APBS electrostatic potential values in various points on the surface? Is there such feature already in Chimerax that I missed? Such feature is essential (I think) to monitor subtle changes in surface potential following mutations or other variations (pH, salt concentration etc.). If it's not there yet, could you please add it to the (enormous, I guess) to-do list? In Chimera this is done by moving the cursor to the various points of interest, a feature that I found most useful (and helpful in convincing color blind referees 😉). Cheers, Boaz Boaz Shaanan, Ph.D. Dept. of Life Sciences Ben-Gurion University of the Negev Beer-Sheva 84105 Israel E-mail: bshaanan(a)bgu.ac.il Phone: 972-8-647-2220 Fax: 972-8-647-2992 or 972-8-646-1710

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Re: [chimerax-users] Problems with Measuring Angles in ChimeraX
by Elaine Meng 10 Sep '21

10 Sep '21

> On Sep 10, 2021, at 11:41 AM, liangb2 <liangb2(a)rpi.edu> wrote: > > Hi Elaine: > I'm new to ChimeraX for Cryo-EM data. Currently, I imported my tomogram (.mrc file) into ChimeraX and acquired a density map of it. I was able to get the x,y,z coordinates of the three points of interest. However, I was not able to find ways to measure the angle among the three points on the tomogram density map. I have looked up tutorials, but all of those I have found are for proteins. > > Can you please provide some help on how I can measure the angle among three points on the density map? I would really appreciate your help. > Thank you for your time! > Best, > Biqing Liang Hi Biqing, Welcome to ChimeraX! We recommend using the chimerax-users(a)cgl.ucsf.edu address for asking questions (CC'd here so you don't need to do anything). Depending on the question, other people might want to see the answer, or give better answers than mine, or I might not know the answer at all. I don't know how you got the X,Y,Z coordinates for those three points. The way I know how to do it: You can put several "markers" (balls, fake atoms) at points on the surface, and/or at peaks in the density values. Then you can select any 3 of the markers (Shift-Ctrl-click on them) and then use the "angle" command: angle sel <https://rbvi.ucsf.edu/chimerax/docs/user/commands/angle.html> The way to put markers on interactively is first to go to the Markers toolbar across the top of the ChimeraX window. The different icons assign different ways of adding markers by mouse click. For example, clicking the third from left icon in the Markers toolbar assigns the right mouse button (= trackpad + Alt on Windows, trackpad + command key on Mac) to adding markers on the surface. See the following for what the different icons mean and explanation of markers: <https://rbvi.ucsf.edu/chimerax/docs/user/tools/markers.html> <https://rbvi.ucsf.edu/chimerax/docs/user/tools/markerplacement.html> 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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Question.
by Yunsik Kang 10 Sep '21

10 Sep '21

Hello, My name is Yunsik Kang, and I am a postdoc in Marc Freeman's lab at the Vollum Institute. I would love to use ChimeraX to predict the structure of my protein of interest. I watched all the YouTube videos and tried to run the program. Unfortunately, my protein is 5005 amino acids in humans and 2958 aa in yeast. I get a message "Please use the full AlphaFold system for long sequences." My question is what is the best way to approach this problem? Should I cut the protein in half and run the program? In one of the videos, it mentions after 700 aa it will have problems. Will it work if I get Colab-Pro? Or would the server crash no matter what. I am not a structural biologist, but I hope the structure can help be predict me with my research. Thank you, Yunsik

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Help with Volume Series
by Ioannis Skalidis 10 Sep '21

10 Sep '21

Greetings to all! I am trying to play a volume series data in ChimeraX (daily build). I open the multiple .mrc frames and they are automatically grouped, but then, when I use the vseries play command, I get an error message that I have not specified a volume series. What am I doing wrong? Should I open the frames differently? I also tried to open them with the open command, a wildcard character for the frame names and vseries true modifier but even then, it only opens the first frame, which I found very strange as well. Could somebody offer some advice? It would be greatly appreciated! Cheers, Yiannis. -- Skalidis Ioannis, MSc Biochemistry & Cryo-EM Scientist PhD Candidate Kastritis Laboratory for Biomolecular Research Cryo-Electron Microscopy & Computational Structural Biology ________________________________________________ Martin-Luther-Universität Halle-Wittenberg Biozentrum, Room A.2.21 IWE ZIK HALOmem NWG III "Kryo-Elektronenmikroskopie an Membranproteinkomplexen" Weinbergweg 22, 06120 Halle tel: +49 345 5524986 web (Lab): https://blogs.urz.uni-halle.de/kastritislab/ web (HALOmem): https://www.halomem.de/en/

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Re: [chimerax-users] [ChimeraX] #5198: Transparent background not transparent when selection outline shown
by Zhao, Bingchun (NIH/VRC) [F] 10 Sep '21

10 Sep '21

Hi, Tom, I received this below email reported that this bug has been fixed. Do I need to download the latest version and re-install the ChimeraX? Thank you very much! Best, Bingchun On 9/9/21, 9:35 PM, "ChimeraX" <ChimeraX-bugs-admin(a)cgl.ucsf.edu> wrote: #5198: Transparent background not transparent when selection outline shown --------------------------------------+------------------------- Reporter: bingchun.zhao@… | Owner: Tom Goddard Type: defect | Status: closed Priority: normal | Milestone: Component: Graphics | Version: Resolution: fixed | Keywords: Blocked By: | Blocking: Notify when closed: | Platform: all Project: ChimeraX | --------------------------------------+------------------------- Changes (by Tom Goddard): * status: assigned => closed * resolution: => fixed Comment: Fixed. Offscreen rendering was making a framebuffer with no alpha channel, even though for image save it already had an offscreen framebuffer with alpha channel. Made offscreen check and not create a new framebuffer if we are already using an offscreen framebuffer. -- Ticket URL: <https://www.rbvi.ucsf.edu/trac/ChimeraX/ticket/5198#comment:3> ChimeraX <https://www.rbvi.ucsf.edu/chimerax/> ChimeraX Issue Tracker

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outline the interface region in chimeraX
by Zhao, Bingchun (NIH/VRC) [F] 09 Sep '21

09 Sep '21

Hi, I wonder if there is a way to outline the interface region in ChimeraX like below: [cid:image001.png@01D7A597.5344EDF0] Previously, I did this in photoshop, but can we label the interface regions with those lines in ChimeraX? Thank you very much! Bingchun Bingchun Zhao, PhD Postdoctoral, VF Biodefense Research Section VRC/NIAID/NIH Bldg 40, Room 2607B 40 Convent Drive Bethesda, MD 20892 Tel: 301-761-7649 Email: bingchun.zhao(a)nih.gov<mailto:bingchun.zhao@nih.gov>

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