- Chimera-users - RBVI Mailing Lists

search a sequence in UCSF chimera
by Xiao Lei 10 Jun '21

10 Jun '21

Dear chimera-users, Is there a way to search a short amino acid sequence (for example: DDDDK) in an openned protein structure in UCSF chimera? Thanks ahead, Xiao

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Removing specific water molecules
by Francesca Magarotto - francesca.magarotto2＠studio.unibo.it 10 Jun '21

10 Jun '21

Hi, I have a problem using Chimera: I need to delete specific water molecules with a specific residue number, but this number is in common with residues that are useful (such as ligands or co-factors). For example, I type "del :546-893" in the command line in order to delete these water molecules, but I delete also the ligand and FAD and I don't want to. I've read the guide about atom specification, but still I don't know how to do it. Hope someone can help me, thank you. Francesca

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Re: [Chimera-users] [ChimeraX] #4232: RFE: make ViewDockX understand SwissDock output
by Elaine Meng 07 Jun '21

07 Jun '21

Hi Michael, I edited out the details of your files below in case you wanted to keep that private, but am CC-ing the chimera users list recommended for asking questions. Since the Swissdock server only keeps the files for a while, I understand you had to save them locally and now you are trying to modify the Chimera web-data files to use the local files. However, I think you can simplify and no longer use a web-data file, but simply a Chimera command file (see below), since the python stuff was just retrieving the files. In that case you would just insert the local file pathnames into the commands that open them. Just name the plain text file containing the commands something.com and open it with Chimera. The command file (plain text) would contain something like this, of course substituting your actual file locations for "[pathname-...]": open [pathname-of-pdb-file] viewdock [pathname-of-docked-ligands-file] color byatom #0 ribbon #0 repr stick :LIG ~disp element.H hbonds intramodel false lineWidth 5 color green Other than the opening of files, you wouldn't necessarily have to use those same commands, you could customize as desired. Further, you could just type in the commands into the command line one by one instead of making a command file, if that's easier. Chimera command files: <https://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/indexcommand.html#cmdfile> I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco > On Jun 7, 2021, at 9:04 AM, Michael Weber <weberm(a)posteo.de> wrote: > > Dear Elaine, > thank you for your quick response. > > I have a question: when now trying to use Chimera instead of ChimeraX to analyze my SwissDock output files I noted that the files may only be analyzed as long as the entire data set related to that docking experiment is still available online on the SwissDock website. Fortunately, I had downloaded the entire data sets and stored them locally. > SwissDock delivers some sort of script in which Chimera commands and the required input file locations are stored as follows: > > <?xml version="1.0"?> > <ChimeraPuppet type="std_webdata"> > <web_files> > <file name="target.pdb" format="text" loc="http://www.swissdock.ch/files/tmp/[...other stuff...]/target.pdb" /> > </web_files> > <commands> > <py_cmd> > import urllib > import tempfile > from chimera import runCommand > tmpDirectory = tempfile.mkdtemp() > urllib.urlretrieve ("http://www.swissdock.ch/files/tmp/[...other stuff...]/clusters.dock4.pdb", "%s/clusters.dock4.pdb"%tmpDirectory) > runCommand("viewdock %s/clusters.dock4.pdb \"Dock 4, 5 or 6\""%tmpDirectory) > </py_cmd> > <mid_cmd>color byatom #0</mid_cmd> > <mid_cmd>ribbon #0</mid_cmd> > <mid_cmd>repr stick :LIG</mid_cmd> > <mid_cmd>~disp element.H</mid_cmd> > <mid_cmd>hbonds intramodel false lineWidth 5 color green</mid_cmd> > </commands> > </ChimeraPuppet> > > I thought I might cure the situation by replacing the web locations by the local hard drive file locations, so I modified it as follows: > [... edited out...] > Of course it does not work properly because I don't know what exactly the syntax looks like for solving my problem when working with local files. > I hope it is not asked too much, but could you help me how to fix this? > > Best regards, > Michael.

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command line clustering (how to select a subSection?)
by Laura Morris 04 Jun '21

04 Jun '21

Recently I've been clustering in Chimera but running into memory limitations on my system. I'd like to do the clustering on a computer with more RAM, but I need to be able to do this using only the command line. I found an old post (http://plato.cgl.ucsf.edu/pipermail/chimera-users/2010-May/005166.html) that includes an example script to do the clustering, but I don't know how to change the subSection to the residues and atoms I want. Here's the portion of relevant code: def main(): import chimera modelList = chimera.openModels.list(modelTypes=[chimera.Molecule]) subSelection = None # Change this to CAs or heavy atoms clusterInfo = _cluster(modelList, subSelection) saveReps(clusterInfo, "reps.pdb") # Change file name if needed The "Change this to CAs or heavy atoms" is exactly what I want to do, but I have no idea how to do it. If this were command line in Chimera, I'd use something like "select #0:3-55@CA". I know there's a "runCommand" function that can be included (using "from chimera import runCommand"). Is this used in some way to set subSelection, and if so, how? Any help is appreciated. Regards, Laura ----- Laura C. Morris Scientific Computing Professional Edison & Prestegard Labs Complex Carbohydrate Research Center 706-542-6286 (lab 1075)

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command question
by Yanhe Zhao 01 Jun '21

01 Jun '21

Good afternoon Elaine and users, I have two questions as to Chimera using as below: 1, how can I plane through and rotate volume at same time? For example how to add rotate options to command "volume #2 planes x,0,42,1; wait 43;"? 2, How I can merge volumes (for example 3 volumes) with their own threshold was kept? Thanks and best, Yanhe

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saving segmented copy of a map
by M.S. Islam 01 Jun '21

01 Jun '21

Hi I was just wondering, is there any way that I can save segmented copy of a map so that I don't have to do segmentation, followed by colouring different segments of the segmented map again and again. Thanks a lot in advance. Saif

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Fwd: Cannot see menus on MacBook Mojave
by Elaine Meng 01 Jun '21

01 Jun '21

> Begin forwarded message: > > From: Eric Werner <evwerner(a)gmail.com> > Subject: Cannot see menus on MacBook Mojave > Date: May 24, 2021 at 9:10:48 PM PDT > > Hi, > > Chimera is great. However in the latest download for the Mac, I can no longer see the menus when in Dark Mode on my Macbook Pro using Mojave. > > In the attached file you can see the the transparent background of the menu drop down list makes it even harder. > > Is there a solution to adjust the menu text and background color and making the menu background opaque? > > Thank you for your help. > > Eric >

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Structure to sequence alignment
by Kamil Steczkiewicz 31 May '21

31 May '21

Dear Chimera community, Does Chimera allow to display multiple protein structures as CA trace, colour corresponding residues in 3d, display these proteins' sequences in alignment window and allow to manually alter the alignment to manually align residues coloured as mutually corresponding (preferably by mouse)? Something like was possible in good old and unfortunately not supported any more Insight program... That's what wraps up to so-called structure-based manual multiple sequence alignment. Essential if you're assessing some highly diversified set of structures and want to have a precise alignment for them. Thanks, Kamil *Kamil Steczkiewicz, PhD* Department of Bioinformatics Institute of Biochemistry and Biophysics Polish Academy of Sciences tel. +48 22 592 *5759 *| +48 668 13 02 13

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Getting the median protein structure after comparing.
by Shradheya R.R. Gupta 29 May '21

29 May '21

Hi, I have two PDB's I compared (superimposed) them using the Chimera tool. But some regions are not superimposed. I want to generate the new PDB which have the superimposed regions coordinates and the median coordinates of the region which is not superimposed. Thank you

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Help needed
by Nirban Dey 28 May '21

28 May '21

Hello, I am a Masters student in India currently using chimera for my thesis. I am facing a problem. I have attached a state file of my docked complex. There some residues 251, 245, 243 formed H bonds with the ligand through the O atom. I am not able to display the residue clearly. O atom is looking like a dot. I want to show the residue clearly making bonds with the ligand without hiding the ribbon like the residue 247. Those residues are clearly visible only if I hide ribbons for that residue. Kindly help me to show the residue properly without hiding their ribbon. Regards Nirban

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Quantify the movement between two domains
by Ahmad Khalifa 27 May '21

27 May '21

Hi, I'm looking for a way to quantify the movement between two domains in my structure. I know I can calculate an RMSD between the same domains in different conformations. I can also generate a distance matrix between the two chains in different conformations. I tried to measure the distance between the two centers of mass of my domains, but the change doesn't really capture the magnitude of the movement, also the same domains are not identical in the two conformations in the sense that one domain is missing so many loops, which will affect the com calculation. What other ways to quantify the distance between two different domains? Thank you.

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Chimera wont start
by Gmail 26 May '21

26 May '21

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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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Fwd: Chimera - remote start up issue
by Greg Couch 24 May '21

24 May '21

tl;dr -- VirtualGL worked. -------- Forwarded Message -------- Subject: Re: [Chimera-users] Chimera - remote start up issue Date: Mon, 24 May 2021 13:16:18 +0000 From: Filip Kadlec <Filip.Kadlec(a)vutbr.cz> To: Greg Couch <gregc(a)cgl.ucsf.edu> Good evening, I'm writing to you with feedback since I remembered you wanted to let know if any of the methods worked. I got to it a bit later than expected (sorry for the delay) and let me tell you it was painful indeed. However the final solution was with VirtualGL with Cygwin combination - Installed Cygwin with all tools needef for X11 forwarding, server... including the VirtualGL client. On server installed VirtualGL server. Then using XLaunch (cygwin provides) and setting the right $DISPLAY variable it is possible to run and quite smoothly operate with visualisation programs (vglconnect, vglrun). Chimera, ChimeraX and also PyMOL works just fine. Thank you for the previous help and advice, it pointed me in this direction! Have a great day. Kind regards Filip ------------------------------------------------------------------------ *Od:* Greg Couch <gregc(a)cgl.ucsf.edu> *Odesláno:* pátek 7. května 2021 20:35 *Komu:* Kadlec Filip (191426) <Filip.Kadlec(a)vutbr.cz>; chimera-users(a)cgl.ucsf.edu <chimera-users(a)cgl.ucsf.edu> *Předmět:* Re: [Chimera-users] Chimera - remote start up issue Yes, as you discovered, remotely displaying 3D graphics is problematic. Sometimes it works, usually if the graphics driver on the remote computer and the local computer are the same (same manufacturer, same operating system, i.e., same variant of Linux and version). In your case, I'd recommend installing the VirtualGL package on the CentOS 7 computer, along with a graphics card and its driver. That way the 3D graphics are done on the CentOS 7 computer and an image is sent to your computer. VirtualGL is available from the epel repository and virtualgl.org. This is also the solution for nomachine and x2go. An alternative would be to try the free cygwin.org X11 server, or a commercial X11 server, like Exceed 3D. If either of those work, please let us know. Good luck, Greg On 5/7/2021 4:28 AM, Filip Kadlec wrote: > Good afternoon! > > I haven't found a solution to this problem in one of your user > threads, internet and I haven't succeeded resolving the issue. > I have installed chimera 1.15 today and it runs well when working on > the desktop. However, it would be very convenient if I could run > chimera remotely. Chimera is installed on Centos 7, I am trying to > remotely operate this PC with Windows 10 PC using MobaXterm. When I > run chimera as /chimera --debug/: > > initializing general preferences > loading Tix > initializing graphics > create application > loading Pmw > creating main window > creating menus > creating toolbar > creating viewer > initializing OpenGL > X Error of failed request: GLXBadCurrentWindow > Major opcode of failed request: 146 (GLX) > Minor opcode of failed request: 5 (X_GLXMakeCurrent) > Serial number of failed request: 2711 > Current serial number in output stream: 2711 > > With OpenGL on Centos-7 PC /glxinfo | grep "OpenGL":/ > OpenGL vendor string: Mesa Project > OpenGL renderer string: Software Rasterizer > OpenGL version string: 1.4 (2.1 Mesa 10.5.4) > OpenGL extensions: > > Have you encountered such problem? Could the problem be with coliding > OpenGLs, or graphical transfer through mobaxterm? It would be a major > help if you could point me in the right direction. > > Thank you in advance and have a great day! > > Kind regards > Filip Kadlec > > > > _______________________________________________ > Chimera-users mailing list:Chimera-users@cgl.ucsf.edu <mailto:Chimera-users@cgl.ucsf.edu> > Manage subscription:https://plato.cgl.ucsf.edu/mailman/listinfo/chimera-users <https://plato.cgl.ucsf.edu/mailman/listinfo/chimera-users>

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What do you do for comparative modeling if the pdb is so new it's not in UniProt?
by Ralph Loring 24 May '21

24 May '21

Hi, I'm very new to Chimera and have been working through the tutorials, including the Comparative Modeling Tutorial. However I'm stumped. I'm interested in modeling chimeric proteins that involve the following pdbs: PDB 7KOO, 7KOX and 7KOQ and I can't get the sequence in my chimera to align with the template structure in the pdbs. The problem is that the template pdbs only came out in April and are not yet included in UniProt. They are deposited in RSCB and EMDB, but these don't appear to be alignment options in Chimera. Do I need to appeal to UniProt, or is there an alternative way to make the association between the sequence and the structure? Any additional tutorials on using MAV would be helpful as there seem to be a lot of editing features that are not explored in your tutorial. Thanks for your help, Ralph Loring Associate Professor of Pharmacology Department of Pharmaceutical Sciences Northeastern University 360 Huntington Avenue Boston, MA 02115 USA 617-373-3216 office 617-373-8886 fax r.loring(a)northeastern.edu

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excluded bilayer in chimera
by Yanhe Zhao 22 May '21

22 May '21

To whom may concern, This is Yanhe Zhao, from UT Southwestern Medical Center. I was curious that how can I exclude the lipid bilayer to show the transmembrane protein electron density when "zone" could not be used as I have no sequence and pdb information. Thanks a lot in advance for any input. Best regards, Yanhe

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Measuring rotation
by JAVAD KARIMBAYLI 18 May '21

18 May '21

Greetings dear sir/madam I was trying to measure the rotation of my protein before vs after activation using the "measure rotation #0 #1" command, which worked smoothly. Then I wanted to check the rotation of specific residues. However, when I tried to specify residues, for example, residue 45 of model0 vs model1, the code didn't work. I have gone through Chimera documentation but didn't really find how to solve the issue. So, I kindly ask for your suggestions about how I may get residue-specific rotations. Thank you in advance Javad Karimbayli

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Covalent bond making and docking
by Zhang, Bixia 14 May '21

14 May '21

Good evening, I was trying to make a man made side chain, which is serine plus uracil. I used the command "bond sel" to connect the oxygen and nitrogen. Then I was trying to do docking to see if this mutation changed the binding affinity. However, after I ran dock prep, the uracil was got rid of because of "poor connection". I am wondering if this arbitrary bond is feasible in chimera and can I do docking with this artificial model? Thank you, Bixia

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Question about error: "the exit code was: -1073731819"
by Sergio Garay 13 May '21

13 May '21

Dear Chimera Users My name is Sergio Garay, I have installed chimera-1.15-win64.exe on Windows 10pro 64bit. But when the program starts to run, the system gives me the following error message and the program closes: chimera exited abnormally; the exit code was: -1073731819. use the -- debug command line option for the full error message I tried installing the two previous versions of the program, with the same result. My PC has a Radeon RX 580 series videocard, and the system uses a WDDM 2.7 video controller. Could you give me any advice on how to fix this problem? Sincerely -- *Prof. Dr. Sergio Garay* *Càtedra de Práctica Profesional de Bioquímica* *Cátedra de Bioinformática* *Facultad de Bioquimica y Cs. BiológicasUniversidad Nacional del LitoralSanta Fe - ArgentinaC.C. 242 - Ciudad Universitaria - C.P. S3000ZAAArgentinaPh. +54 (342) 4575-213Fax. +54 (342) 4575-221 *

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Enquiry regarding application
by Prem Rajak 13 May '21

13 May '21

Dear Sir/madam, I have a query regarding the use of UCSF Chimera for molecular docking studies. I am a faculty at an University and would like to analyse my molecular docking research studies using UCSF Chimera. Moreover, I would like to publish the images thus analysed in national/international standard journals. Publications may be multiauthored. Therefore, please let me know whether I can use the software free of cost or I have to purchase the licence. Looking forward to your reply. Thanks and regards, Dr. Prem Rajak Kazi Nazrul University West Bengal, India

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Help for Chimera launch fail
by 黄华 12 May '21

12 May '21

Dear Eric Pettersen, This is a Chimera User in South China Normal University(Guang zhou, China).  Now, I found I can not start the Chimera even after I reinstalled. Would you tell me how could I fix this problem? This is the message after I launch Chimera-debug: Cannot execute 'gzip': no automatic decompression of .Z files initializing general preferences loading Tix initializing graphics Return code: -1073741819 Press return or enter to to exit thanks for your help! hua ------------------ Hua Huang Principal Investigator School of Life Science South China Normal University Guangzhou, China 黄华华南师范大学M邮箱/未归类/生命科学学院/教职工/办公华南师范大学始建于1933年，是一所学科门类齐全的国家“211 工程”重点建设大学。 “艰苦奋斗、严谨治学、求实创新、为人师表 ”是华南师范大学校训。  

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BLAST fix
by Eric Pettersen 12 May '21

12 May '21

Hi all, The RCSB switching off http access and only allowing https (which had been announced) unfortunately broke the fetching of PDB info associated with BLAST results, basically breaking the BLAST tools in both Chimera and ChimeraX. Fixes have been applied and will be available in tomorrow's daily builds. For ChimeraX, also available in the 1.2.3 release candidate -- hopefully also out tomorrow. --Eric Eric Pettersen UCSF Computer Graphics Lab

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Re: [Chimera-users] S33C .mrc file
by Elaine Meng 11 May '21

11 May '21

Dear Neha, Now you tell me that you opened 1qwa as the pdb (atomic structure) file, so this mrc file is completely irrelevant. I believe you just used the wrong steps to save the pdb. You need to use menu: File... Save PDB, and in that dialog "Save models" area, choose the atomic structure model. (Hiding the map does not matter, centering the view does not matter, it is only what you choose in the dialog). Then as Tom already said, you also have to turn on the "Save relative to model" option and chose the map model as the one you want to save the PDB relative to. Here is the help for the Save PDB dialog: <https://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/savemodel.html#pdb> 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 10, 2021, at 9:15 PM, Neha Goel <nehagoel24march(a)gmail.com> wrote: > Dear Elaine, > Thank You. Here I .mrc is attached. I was using a reference pdb like 1qwa from pdb database. > Regards > Neha Goel

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Unable to save file in pdb
by Neha Goel 10 May '21

10 May '21

Dear Chimera, I have a .mrc file. I reopened the file in chimera and would like to save it in pdb. I am unable to save it. It needed the molecular model pdb. Kindly guide me the way to save it. Regards Neha Goel

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Rotate chains independently
by Roy Batty 10 May '21

10 May '21

I have a pdb with a homodimeric conformation for two alpha helix transmembrane domains. This structure features a cross-like conformation, interacting at given residues. I want to rotate each of the domains 15º along the z-axis. So for example, something like this would be fine: select :.A (select chain A) turn z -15 *@*ca,cb (rotate chain A 15º, from the residues given as an anchor point) Is there anything like this? Thx

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