- Chimera-users - RBVI Mailing Lists

Inquiry: Covalent bond distances
by Joshua Angelo Mandanas 18 Oct '24

18 Oct '24

Greetings from the Philippines! Hi, I am Assoc. Prof Joshua Angelo, a Lead Researcher. I am currently utilizing Chimera to analyze/visualize the docked structures I processed in ClusPro. In the course of my utilization with Chimera, I came across that majority of hydrogen bonds have closer atomic interactions (e.g. 1.8 Å- 2.5 Å), as opposed to covalent bonds (I usually get atomic distances more than 2.5 or 2 Å). Note, that I based the covalent bonds based on the label from the atomic distance and nature of the residues involved (e.g. S-O, C-O). I humbly would like to know why covalent bonds in UCSF Chimera have further atomic (residue) distances between inter-models? Is it because of torsions from nearby hydrogen bonds? Or torsions from the actual docked structure? Hope for your prompt response. Thank you very much! Best regards, JOSH

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Re: [chimerax-users] Issues accessing your websites
by Elaine Meng 18 Oct '24

18 Oct '24

See previous announcement forwarded below. To the best of my knowledge, we expect the websites etc. to be available again on Oct 21. They may be available earlier than that, but not be reliable (could go back down). Elaine > From: Elaine Meng via ChimeraX-users <chimerax-users(a)cgl.ucsf.edu> > Subject: [chimerax-users] Oct 14-20 Chimera(X) website downtime > Date: October 10, 2024 at 11:38:29 AM PDT > To: ChimeraX Users Help <chimerax-users(a)cgl.ucsf.edu>, "chimera-users(a)cgl.ucsf.edu List" <chimera-users(a)cgl.ucsf.edu> > Reply-To: Elaine Meng <meng(a)cgl.ucsf.edu> > > Planned downtime for server maintenance: > > The Chimera and ChimeraX websites, Toolshed, web services (Blast Protein, Modeller, ...) and cgl.ucsf.edu e-mail will be unavailable starting Monday, October 14, 10 AM PDT and continuing for several days, potentially through the following weekend (October 14-20). > > Apologies for the inconvenience, > Elaine > ----- > Elaine C. Meng, Ph.D. > UCSF Chimera(X) team > Resource for Biocomputing, Visualization, and Informatics > Department of Pharmaceutical Chemistry > University of California, San Francisco > On Oct 17, 2024, at 8:10 AM, Karp Mike (External) via ChimeraX-users <chimerax-users(a)cgl.ucsf.edu> wrote: > > Hi, > We’ve been trying to install a chimerax plugin over the last few weeks and noticed we were unable to access the webpage the application tries to open (ChimeraX Toolshed). We checked and found this wasn’t accessible from multiple internet connections. > I’ve since noticed we are also unable to access any content on https://cgl.ucsf.edu > Are you aware of an issue with your web sites? > Regards, > Mike.Legal Notice: This electronic mail and its attachments are intended solely for the person(s) to whom they are addressed and contain information which is confidential or otherwise protected from disclosure, except for the purpose for which they are intended. Dissemination, distribution, or reproduction by anyone other than the intended recipients is prohibited and may be illegal. If you are not an intended recipient, please immediately inform the sender and return the electronic mail and its attachments and destroy any copies which may be in your possession. UCB screens electronic mails for viruses but does not warrant that this electronic mail is free of any viruses. UCB accepts no liability for any damage caused by any virus transmitted by this electronic mail. (Ref: #*UG1107) [Ref-UG1107] > _______________________________________________ > ChimeraX-users mailing list -- chimerax-users(a)cgl.ucsf.edu > To unsubscribe send an email to chimerax-users-leave(a)cgl.ucsf.edu > Archives: https://mail.cgl.ucsf.edu/mailman/archives/list/chimerax-users@cgl.ucsf.edu/

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Question about Ramachandran probability assignment to attributes
by Sergio Garay 18 Oct '24

18 Oct '24

Hi everyone! I have a question regarding the use of probability assignment to attributes: for example, if I take chain A of 1ay7.pdb, open the Ramachandran plot, and ask it to assign the probabilities as an attribute, then select all residues with a probability lower than 0.01, I end up with two selected residues, one in the allowed regions for alpha helices and another in the beta sheet regions. I expected that residues outside the allowed regions or near the edges of the allowed zones would be selected, not in the center of them. Can someone explain what my mistake is? Thanks a lot! Sergio -- *Dr. Sergio Garay* *Profesor Adjunto 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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Assistance required for Chimera software download
by Parnian Soleimani 18 Oct '24

18 Oct '24

I hope this email finds you well. I am having trouble accessing the Chimera software download site. I would greatly appreciate your guidance on how to resolve this matter. Thank you in advance for your help.

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Oct 14-20 Chimera(X) website downtime
by Elaine Meng 10 Oct '24

10 Oct '24

Planned downtime for server maintenance: The Chimera and ChimeraX websites, Toolshed, web services (Blast Protein, Modeller, ...) and cgl.ucsf.edu e-mail will be unavailable starting Monday, October 14, 10 AM PDT and continuing for several days, potentially through the following weekend (October 14-20). Apologies for the inconvenience, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Resource for Biocomputing, Visualization, and Informatics Department of Pharmaceutical Chemistry University of California, San Francisco

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Center and Orient
by Hernando J Sosa 09 Oct '24

09 Oct '24

Dear Chimera, What would be the equivalent commands to the Center and Orient buttons at the bottom of the Volume Viewer menu tab? Thanks H.

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How will hydrogen bonds be highlighted in the final rendering
by 姜恩誉 09 Oct '24

09 Oct '24

Hello, when chimera software was used to analyze the interaction between small molecular ligands and proteins, the hydrogen bond width was set to 24, but the hydrogen bond in the rendered picture was very thin and difficult to distinguish. How can I solve this problem？ Looking forward to your reply 姜恩誉 2023111025(a)stu.njau.edu.cn

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Request for authorization to use Chimera software
by Stany Tsom 03 Oct '24

03 Oct '24

Dear UCSF Chimera software Coordinator, I am Tsomene Stany Lionel, I have a master's degree in Organic Chemistry obtained at the University of Yaoundé 1, a well known University around central Africa, my studies was focused in isolation, synthesis, characterizations, in vitro and in silico studies, I have worked under the direction of Dr. Messi Angelique Nicolas. Since 2020, during the pandemic there is an increase demand in computerized aided research of bioactive compounds. At the same time, it helps us focus on specific bioactive compounds showing better results. At Yaoundé 1 University, there is a large need in learning and usage of your software for in silico purposes, that is for molecular docking studies, with your permission we will like to organize a series workshops at the University to help masters students, Ph D students and also Professors for the better understanding of molecular docking and help then have better results for their research purposes. We will like at the end of each workshop deliver a certificate for this software learning. Software coordinator, we will really be glad if you accept directing, giving us permission for this use of your software for these workshop Organization and while not coordinating this future. At the end we will with your permission co sign the certificates we will deliver to the participants. References Dr. Messi Angelique Nicolas, Senior Lecturer at University of Yaoundé 1 messiangeliquenicolas(a)gmail.com Dr. Ngomo Orleane , Senior Lecturer at University of Yaoundé 1 orleansn(a)yahoo.fr All the details of my informations are in the attachment -CV/resume - Masters degree (masters 2 and 1 transcripts) -Bachelors degree While waiting for an answer from you UCSF Chimera Software coordinator, receive my distinct greetings. Sincerely Tsomene stany

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Software copyright consulting
by 姜恩誉 27 Sep '24

27 Sep '24

Hello, is the application of your Chimera X software for paper publication a non-commercial use？ Looking forward to your reply。 Thank you 姜恩誉 2023111025(a)stu.njau.edu.cn

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Gaff type for Mn2+ to run antechamber
by Medhanjali Dasgupta 25 Sep '24

25 Sep '24

Dear all, I am trying to generate the electrostatic surface for a protein that contains Mn in the 2+ state in its active site. I've tried to go about it in two ways but keep getting stuck. 1. If I use chimera or Pymol to use the PDB2PQR-APBS plug in, it cannot find GAFF type for Mn2+ so it cannot run anyechamber to allocate the atomic charge to Mn2+. Am i missing an update? Is there any way to get around this? Can I run antechamber myself to recognise my ion of interest, and then determine the charge, input it into the .pqr file and run APBS? 2. I have used the online server hosted at poissonboltzmann.org to run pdb2pqr and apps but run into the problem of not knowing what the atomic charge is for Mn2+. Any help would be appreciated. Thanks!!! Medhanjali

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question about non-standard amino acids
by Jessie Jaynes 23 Sep '24

23 Sep '24

Hi Folks, I have a short peptide (O=ornithine) FEFOGGOFEF Is it possible to construct this peptide in Chimera? Thank you, Jesse

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Generating a single electrostatic potential surface for a protein + ligand complex
by jadeshi88＠gmail.com 22 Sep '24

22 Sep '24

Hi, New user to ChimeraX here, would really appreciate some help! I'm trying to generate an electrostatic potential surface for a protein-ligand complex. Currently, I am using the surface/coulombic, and surface ligand/coulombic ligand commands to generate surfaces separately for the protein and ligand, and then exporting to an .obj file. However, by doing so I'm left with two separate surface meshes, and what I really want is a single surface that encapsulates both entities. Is it possible to do this? Thanks in advance!

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MD on Chimera
by Manon Bulliard 20 Sep '24

20 Sep '24

Good afternoon, I was using chimera to do molecular dynamic simulation. I had to download Chimera on my new computer and now have the 1.18 version. It seems this feature is not anymore present under Tools>MD/Ensemble Analysis>molecular dynamic simulation. Do you know where I can find it to still be able to perform my modeling as previously? Thank you in advance, Manon Manon Bulliard, PhD EPFL | ISREC | Prof. Constam group SV2837 | Station 19 | CH-1015 Lausanne manon.bulliard(a)epfl.ch

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Need help to resolve the architecture
by Farida Aziz 20 Sep '24

20 Sep '24

Dear Sir/Madam, I want to install chimera (chimera-1.18-linux_x86_64.bin) on my ubuntu 24.04 LTS (apple mini mac M2) I am facing so many errors in installtion as shown below •/chimera-1.18-linux_x86_64.bin bash: •/chimera-1.18-linux_x86_64.bin: cannot execute binary file: Exec format error sudo •/chimera-1.16-linux_x86_64.bin [sudo] password for codebind:•/chimera-1.16-linux_x86_64. bin: 1: Syntax error: word unexpected (expecting ")") I used this command ''Uname -m '' to find the archetecture which is ''aarch64'' the binary file is ''x86_64''. Please help me to fix this problem, I this regards. will be very geatful. Thanking in anticipation. Rgards Dr.Farida

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Selecting chain via command line
by Ellen Shrock 19 Sep '24

19 Sep '24

Hello, I am trying to write a script that will iterate through lists of PDB IDs, the relevant antibody chain labels within those PDBs, and antigen chain labels, and annotate the contacts between the antibody and antigen using the command findclash. After opening each PDB file, I am struggling to find a way to select the antibody chains as "sel1" and the antigen chain(s) as "sel2" since the command "select" does not seem to recognize chain labels. Could you please help me find a way to accomplish my goal? Thank you, Ellen

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Python script to add hydrogens to selected carbon atoms
by Mandelli, Davide 18 Sep '24

18 Sep '24

Dear developers, I am trying to automatize a task using the chimera python interface. In the graphical user interface, I can get the result I want by performing the following actions: 1) Select a carbon atom (ctrl+left button) 2) Tools --> Structure Editing --> Build Structure 3) In the "Build Structure" window, select "Modify Structure" 4) Change selected atom to...: "Element C", "Bonds 4", "Geometry Tetrahedral" (basically the default) 5) Apply 6) Save as pdb Is it possible to create a python script to do 1-6 (repeating 1-5 for several carbon atoms identified by residue id and name)? I could then very easily prepare a bash script to apply these changes to hundreds of pdb files. I tried asking chatGPT for a quick answer, but most probably it is using python classes and methods that actually do not exist. Looking at the online documentation was also unsuccesful, but maybe you could point me to the right place. Thanks a lot! Best, Davide Dr Davide Mandelli Institute of Neuroscience and Medicine INM-9 Forschungszentrum Jülich Email: d.mandelli(a)fz-juelich.de<mailto:m.alfonso-prieto@fz-juelich.de> --------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------- Forschungszentrum Juelich GmbH 52425 Juelich Sitz der Gesellschaft: Juelich Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 Vorsitzender des Aufsichtsrats: MinDir Stefan Müller Geschaeftsfuehrung: Prof. Dr. Astrid Lambrecht (Vorsitzende), Karsten Beneke (stellv. Vorsitzender), Dr. Ir. Pieter Jansens --------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------

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Error when opening session file cross-platform
by Alexander Lee 17 Sep '24

17 Sep '24

Apologies, I had accidentally sent this email to the ChimeraX platform. Now reposting it to the Chimera mail platform. I created a python session file on ubuntu and tried to open it on windows. Ubuntu was using Chimera 1.18 build 42535 but windows was using 1.18 build 42531. I've tried updating chimera on windows, but it said I was on the latest version already. When I open it on ubuntu on another desktop or from where I created it, it works. My session file is ~ 1.5 GB including smoothed trajectory. What should I do? Here are the outputs after running debug on windows: Cannot execute 'gzip': no automatic decompression of .Z files initializing general preferences loading Tix initializing graphics create application loading Pmw creating main window creating menus creating toolbar creating viewer initializing OpenGL initializing preferences initializing dialogs initializing COM initializing extensions Return code: -1073741819 Press return or enter to to exit [cid:0c988132-7bb8-429c-a6c7-f91f6db3b590] [cid:55bba9bf-1168-4782-b772-4d2e36e05e97]

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New Install of Chimera on RHEL 9
by Evan Kantrowitz 12 Sep '24

12 Sep '24

I have been working with my IT department to port a script that uses Chimera from an old linux machine to a new Linux machine running RHEL. I setup my own test node at home with RHEL (same version). I got the script working on my test node. I am now moving the system to the IT node. When I reinstalled the same version of Chimera (Chimera64-2024-04-12) on that machine and run the script when Chimera starts I get Tkinter errors and others (see below). What do I need to do to get this version of Chimera running? Any suggestions would be appreciated. Should I try a more current build? ERRORS: Traceback (most recent call last): File "/opt/viewmotions/chimera64/share/__main__.py", line 73, in <module> value = chimeraInit.init(sys.argv) File "/opt/viewmotions/chimera64/share/chimeraInit.py", line 680, in init import chimera File "/opt/viewmotions/chimera64/share/chimera/__init__.py", line 2782, in <module> from SimpleSession import BEGIN_RESTORE_SESSION, END_RESTORE_SESSION File "/opt/viewmotions/chimera64/share/SimpleSession/__init__.py", line 14, in <module> from save import saveSession, sessionID, noAutoRestore, autoRestorable, \ File "/opt/viewmotions/chimera64/share/SimpleSession/save.py", line 13, in <module> from chimera import replyobj, selection, SessionPDBio, version File "/opt/viewmotions/chimera64/share/chimera/replyobj.py", line 24, in <module> import Tkinter File "/opt/viewmotions/chimera64/lib/python2.7/lib-tk/Tkinter.py", line 39, in <module> import _tkinter # If this fails your Python may not be configured for Tk ImportError: libXss.so <http://libxss.so/>.1: cannot open shared object file: No such file or directory Thanks Evan ----------------------------------------------------------------------------- Evan R. Kantrowitz, Ph.D evan.kantrowitz(a)bc.edu <mailto:evan.kantrowitz@bc.edu> Emeritus Professor of Chemistry Cell: 617-775-9915 Boston College www2.bc.edu/evan-kantrowitz <http://www2.bc.edu/~kantrow> -----------------------------------------------------------------------------

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Announcement: Release of DOCK 6.12
by Scott Brozell 12 Sep '24

12 Sep '24

We are pleased to announce the release of DOCK 6.12. DOCK is a suite of programs for molecular docking. The source code for DOCK 6.12 is available for download and free for academic users at https://dock.compbio.ucsf.edu/DOCK_6/index.htm This release includes several major new features: A new implementation of the hierarchical database search method of DOCK 3 which samples ligand degrees of freedom from precomputed conformations, a new covalent docking algorithm called attach-and-grow which aligns covalent residues and dummy atoms on ligands to grow conformations, a new receptor desolvation scoring function based on GIST, and updates to the chemgrid scoring function to match DOCK 3.7. For full information on what is new in DOCK 6.12, please visit: https://dock.compbio.ucsf.edu/DOCK_6/new_in_6.12.txt Sincerely, The DOCK Team Please visit us at the DOCK Web site. https://dock.compbio.ucsf.edu

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How to move ions along with protein structure
by Amir Mehdi 10 Sep '24

10 Sep '24

Hi, I am MEHDI I am trying to make a fusion between two proteins but when I am joining them by using build structure->joint structure (C-N peptide bonds) it will only move the protein structure but not the ions attached with the structure, can you suggest me something what to do in this case? Thank you

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morph command in chimerax
by Hansen, Bryan (NIH/NIAID) [E] 09 Sep '24

09 Sep '24

Hi, I'm using ChimeraX v 1.8 (2024-06-10) and I'm having a problem with the morph command. No matter how I format the command I'm getting the same error message of "Require at least 2 structures for morph" I've tried morph #3,4 core 0.1 frames 75 wrap t and morph #3#4 core 0.1 frames 75 wrap t These are 2 electron density maps so there's no sequence info docked in yet. Thanks for any tips or advice on what I'm doing wrong. Bryan Hansen Computational Biologist / Electron Microscopist NIH/NIAID/RTB/RML/EMU Rocky Mountain Laboratories 903 S. 4th St Hamilton, MT 59840 406.363.9202 *********************************************************** The information in this e-mail and any of its attachments is confidential and may contain sensitive information.It should not be used by anyone who is not the original intended recipient. If you have received this e-mail in error, please inform the sender and delete it from your mailbox or any other storage devices. National Institute of Allergy and Infectious Diseases shall not accept liability for any statements made that are sender's own and not expressly made on behalf of the NIAID by one of its representatives. ***********************************************************

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Chimera interface to Modeller
by Vonderviszt Ferenc 03 Sep '24

03 Sep '24

Hello, I have been using the Chimera interface to Modeller via a web service. This service has been down for a few days. It always stops with the following error message: Service 'opal:Modeller9v8Service' is unavailable What should I do? Please help me. Thanks, Feri

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Finding SASA for individual residues
by Prathvi Singh 29 Aug '24

29 Aug '24

Hi Elaine, Can I use chimera or chimeraX to know the solvent accessible surface area (SASA) for selected residues? -- Prathvi Singh, Research Fellow, Department of Biological Sciences & Bioengineering, Indian Institute of Technology, Kanpur-208016

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display cartoon and H-bonds
by Bryan Sutton 27 Aug '24

27 Aug '24

I can't for the life of me figure out how to display ONLY a cartoon representation of my protein and backbone H-bonds. ChimeraX keeps forcing side-chain:backbone bonds.. I don't want that. I can do it if I show the backbone atoms, but I don't want to do that either. I only want it to show ONLY backbone H-bonds.

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Problem of starting Chimera
by 郭家瑞 24 Aug '24

24 Aug '24

Hello, This is the first time I am stalling Chimera, but I meet the problem of starting the software. According to the Debug command, I have tried update my graphic driver, installed Gzip and tried different Chimera releases including 1.18, 1.17 and 1.14. However, the software still cannot be started. The content of debug log is copied as following: D:\Chimera 1.14\share\chimeraInit.py:99: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal if chimera_env.get(e) == _original_environ.get(e): initializing general preferences loading Tix initializing graphics Return code: -1073741819 I am looking forward to any guidance or help for solving the problem. My graphic is NVIDIA Geforce 3050Ti and the opperation system is Windows 10. If necessary, more details can be supplied. Sincerely Appreciated, Jiarui Guo from China

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Mac Version
by Gonzalo de Prat Gay 22 Aug '24

22 Aug '24

Hello I have downloaded Chimaera 1.18 for Mac I am running Ventura 13.4.1, and it tells me the file is corrupted when I try to open de dmg Is there any compatibility issue or should it run on this OS X? Thanks Gonzalo

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chimera
by 2719354821＠qq.com 13 Aug '24

13 Aug '24

After installing and opening the UCSF Chimera software, pythonw.exe keeps popping up new windows, causing the software to malfunction. I have tried downloading various versions of the UCSF Chimera software, but after installation, when I double-click to open it, various interfaces keep popping up. At the same time, Microsoft Edge also continuously opens web pages, rendering both the software and the computer unusable. I found that a few years ago, someone in the community had the same experience. How can this be resolved? Most concerning is that, like them, I am also using a Honor laptop.

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Chimera
by Kotin, Robert 13 Aug '24

13 Aug '24

Good afternoon – I’d appreciate advise for virus capsid viewing. Adeno-associated viruse structures, e.g., 1lp3, consist of the asymmetric unit repeated 60x to form the icosahedral capsid (T=1). I’d like to highlight the equivalent residue in each of the 60 subunits but haven’t figured out how to do that (except by manually going through each of the 60 chains). Please let me know if there are commands that can specify the residue in chains 1, 2, 3,…60. Thank you Robert Kotin

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.crd file not opening
by safi ch 05 Aug '24

05 Aug '24

Greetings, hope you are doing well. I want your guidance on how can I open a .crd file on UCSF Chimera. I am working on a protein and its mutants and performed their docking via Swiss Dock, it gave results in form of .crd file that I cannot open. My supervisor also has no idea how to open it, so please help me in this regard, I need to open it to work further on my research. Waiting for your kind response please.

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August 1 Chimera(X) website downtime
by Elaine Meng 01 Aug '24

01 Aug '24

Planned downtime for server maintenance: The Chimera and ChimeraX websites, Toolshed, web services (Blast Protein, Modeller, ...) and cgl.ucsf.edu e-mail will be unavailable August 1, 3-6 pm PDT. Apologies for any inconvenience, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Resource for Biocomputing, Visualization, and Informatics Department of Pharmaceutical Chemistry University of California, San Francisco

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column selection: chimera vs chimeraX
by 7mkf 22 Jul '24

22 Jul '24

Hi there, I'm an avid user of chimera and have begun transitioning to chimeraX. A feature I find very useful in chimera is expand selection to columns within the multialignviewer. Is there a way to do this in ucsf chimeraX? Many thanks, Mike

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molmap onGrid option
by Hernando J Sosa 18 Jul '24

18 Jul '24

Dear Chimera I am using the molmap command with the option onGrid but the results are not what I would have expected. With a loaded map (#0) and an atomic model(#1) The command: molmap #1 6.0 onGrid #0 generates a map with a voxel size of 6.768 even though the loaded map #0 has a voxel size of 0.846 Trying to force the voxel size with molmap #1 6.0 onGrid #0 gridSpacing 0.846 produces the same result as the onGrid option overrides the gridSpacing option. How can I produce a map using molmap that has exactly the same dimensions and voxel size of map #0? Thanks H. _

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Internal Server Error. Can Not Download chimera 1.18
by Setyanto Md 17 Jul '24

17 Jul '24

Dear Chimera User and Development Team, I tried to download ucsf-chimera version 1.18. However, the message 500 Internal Server Error appears. Is this error from our internet network, or is it from the chimera server? Thank you ------- Setyanto Tri Wahyudi ------- Computational Biophysics Group, Department of Physics, IPB University - Indonesia Gedung Fisika Wing-S Lt.2 Jl. Meranti Kampus IPB Darmaga Bogor - 16680 Indonesia

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Docking with auto dock fails for a ligand containing a Boron atom
by Patrone Marco 15 Jul '24

15 Jul '24

Dear All, I’m trying to dock a ligand containing a boronate substituent using Auto Dock Vina within Chimera v. 1.13.1 The process fails as the B in the pdb instance is not recognized for Boron and the following syntax error is printed “Parse error on line 27 in file "ligand.pdbqt": ATOM syntax incorrect: "B" is not a valid AutoDock type. Note that AutoDock atom types are case-sensitive” Is there any way to overcome this? Are there newer/different libraries that inlcude also Boron element I can update my ADV with? Many thanks for your time and best regards, marco -- Marco Patrone – PhD Biocrystallography Unit Division of Immunology, Transplantation, and Infectious Disease (DITID) DIBIT – San Raffaele Scientific Institute Via Olgettina, 58 20132 Milano Italy phone: +39 0226434921 fax: +39 0226434153 http://www.hsr.it/research/organzation/massimo-degano [https://p.hsr.it/5xmille/b2024.jpg]<https://www.5xmille.org/?utm_source=firmamail&utm_medium=email&utm_campaign…> CODICE FISCALE 07636600962 Scopri di più su www.5xmille.org<https://www.5xmille.org/?utm_source=firmamail&utm_medium=email&utm_campaign…> Rispetta l’ambiente: non stampare questa mail se non è necessario. Respect the environment: print this email only if necessary.

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Covalent substrate modeling and minimization
by wh-kelvin.chung＠polyu.edu.hk 14 Jul '24

14 Jul '24

Good day I am a researcher studying antibiotic interaction and trying to make a model with a substrate covalently bound to the active site. There is a homolog with a crystal structure (PDB: 4KQO), and I am going to add the bound substrate in this pdb file to my target protein where the mode was generated by alphafold server. Although the workflow shall be simple, I still have some problems, could you kindly help? 1. Firstly, I would like to check whether the model of 4KQO is good enough for modeling, by examining the electron density map (open 4KQO, open 4KQO from eds). However, I found that it is a bit different from the tutorial (https://www.cgl.ucsf.edu/chimerax/docs/quickstart/index.html, pdb:1a0m) that the electron density of 4KQO did not cover the substrate molecule. I am totally ignorant in crystallography, so, how could I visualize the electron density of the substrate? by any symmetry operation / command so that I could check whether there is "electron density in the substrate" ? 2. I aligned 4KQO with the alphafold generated model, and I deleted the protein from 4KQO, and combined the two model, make a bond between the active residue with the substrate, however, I am not sure how to (1) check the bond length and angle is appropriately assigned, and (2) do energy minimization to reorientate side change to eliminate the crash with the substrate. Thank you very much for your help in advance Have a nice weekend

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Capturing output of measure center command
by ldreher＠smith.edu 12 Jul '24

12 Jul '24

Hello, I am trying to write a python script to prepare proteins for molecular docking, and as part of that I want to be able to identify and save the center coordinates of each protein. using runCommand('measure center #0') works fine, but I am at a loss as to how to capture the output of that command. Ideally I would like to save the output as a string in python. Any advice on how to go about this would be appreciated! Thanks! Laura

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Difference between command line and menus
by edith.gincel＠u-paris.fr 09 Jul '24

09 Jul '24

Dear all I am trying to check contacts between ligands and protein. I tried to use the command line, to be able to do it semi-automatically, but I don't find any contact. When I use the command line, I find contacts. Has someone experienced such problems? Thank you for your help

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Stereo in ChimeraX
by Engelhardt, Peter 01 Jul '24

01 Jul '24

Hi chimera team, We can’t get any stereo to work in ChimeraX though several trials. In the earlier Chimera all worked perfectly. We are especially interested in red-cyan stereo as it’s most suitable for a large public and easy to use even with colors. Could you please let us know how to install e.g. red-cyan stereo for ChimeraX. We thank you in advance Cheers Peter __________________________ Peter Engelhardt PhD., Docent Adjunct Professor in Molecular Genetics Unit of Molecular Electron Tomography and Nanoscopy Nanomicroscopy Center (NMC), Otanano Aalto University, School of Science and Technology, Puumiehenkuja 2, FI02150 Espoo Finland Mobil Phone: +358 400193342 Email: Peter.Engelhardt(a)Helsinki.Fi<https://webmail.helsinki.fi/horde/imp/dynamic.php?page=message&buid=2535&ma…> Email: Peter.Engelhardt(a)Aalto.Fi<mailto:Peter.Engelhardt@Aalto.Fi> Sent from my iPhone

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script for comparing surfaces bits
by chiarini＠takisbiotech.it 24 Jun '24

24 Jun '24

Dear all, I'm trying to come up with some method to compare surfaces of the same protein area over some trajectory. A simple RMSF doesn't cover the analysis as a roto-traslation of some parts might retain the surface form and shape, whereas a residue might have a complete rearrangement of its surrounding without undergoing large RMSF changes. Some software based on Masif are available, tough they do not confront between trj frames. Are there any turnarounds in chimera to do this? A function similar to RMSD but for surfaces that maybe could be emplyed in this specific case? Thank you all, Valerio Chiarini -- Dr. Valerio Chiarini _Senior Scientist_ Proteins & Monoclona Antibodies Department b Takis Biotech c/o Tecnopolo Via di Castel Romano, 100 00128 Rome, Italy Tel.: +39 06-50576077 Fax: +39 06-50576710 Email: chiarini(a)takisbiotech.it Web: http://www.takisbiotech.it 196/03_ _Le informazioni contenute in questa comunicazione e gli eventuali documenti allegati hanno carattere confidenziale, sono tutelate dal segreto professionale e sono ad uso esclusivo del destinatario. Nel caso questa comunicazione Vi sia pervenuta per errore, Vi informiamo che la sua diffusione e riproduzione C( contraria alla legge e preghiamo di darci prontamente avviso e di cancellare quanto ricevuto. __Grazie._ _This e-mail message and any files transmitted with it are subject to attorney-client privilege and contain confidential information intended only for the person(s) to whom it is addressed. If you are not the intended recipient, you are hereby notified that any use or distribution of this e-mail is strictly prohibited: please notify the sender and delete the original message. __Thank you._

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(no subject)
by furkan calapoğlu 20 Jun '24

20 Jun '24

How can i do organometalic ligand and protein docking ?

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Score decimals question
by VALERIA MARIA CARRILLO RAMIREZ 19 Jun '24

19 Jun '24

Hi, I'm doing a work for college and my professor is asking for an analysis via Autodock Vina. However I have to calculate scores and the program is giving them with only one decimal and I need to report the values with 3 decimals. How can I change that? Thanks a lot :)

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Aligning small molecules in Chimera
by Prathvi Singh 19 Jun '24

19 Jun '24

Hi Elaine, Is it possible to superimpose/align small molecules in chimera/chimeraX? I have isolated a very small part of a polypeptide chain from a PDB file (it contains a CO and NH group engaged in peptide bond formation and both the groups are flanked by C-alpha atoms such that the structure's formula becomes CH3-CO-NH-CH3). I have 10 such PDB files. I want to extract this fragment from each PDB file and superimpose them to know the differences. Thank you Prathvi Singh, Research Fellow, Department of Biological Sciences & Bioengineering, Indian Institute of Technology, Kanpur-208016

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RBVI downtime
by Eric Pettersen 13 Jun '24

13 Jun '24

Hi all, The RBVI compute cluster will be down for scheduled maintenance Monday and Tuesday of next week (June 17/18) which means that the Chimera and ChimeraX web sites (including the ChimeraX toolshed) and mailing lists will be down during that time. This also means that web services from Chimera/ChimeraX that access our compute cluster will not work (Blast Protein, Modeller tools, sequence realignment). We are sorry for any inconvenience. --Eric Eric Pettersen UCSF Computer Graphics Lab

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ChimeraX_InfoRequest
by Altan KARA (MAM-GMBE) 09 Jun '24

09 Jun '24

To whom it may concern, How we can create high resolution images with ChimeraX? No matter what I tried still the outputted images are not in high resolution. Thanks Dr. Altan KARA Kd. Uzman Araştırmacı TÜBİTAK MAM Gen Mühendisliği ve Biyoteknoloji Enstitüsü Barış Mah. Dr. Zeki Acar Cad. No.1 P.K. 21 41470 GEBZE / KOCAELİ T +90 262 677 3371 F +90 262 641 2309 www.mam.gov.tr altan.kara(a)tubitak.gov.tr

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Converting a carbonyl group to carboxylic acid group
by Prathvi Singh 06 Jun '24

06 Jun '24

Hi Elaine, I have a SER residue which is in the middle of a polypeptide chain. Is there a way in chimera/chimeraX to specifically extract this residue such that the carbonyl group bonded to its N-terminal NH group also gets extracted but is converted to carboxylic acid group (-COOH group) before extracting? Thanks in advance, Prathvi Singh, Research Fellow, Department of Biological Sciences & Bioengineering, Indian Institute of Technology, Kanpur-208016

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Help saving models as .pdb file
by Jacek Jagodzinski 03 Jun '24

03 Jun '24

I have constructed model of pentameric protein by exchanging one of the chains with a very closely related chain from other variant of such pentameric protein. Chimera recognizes that my model consists of parts of two proteins. I would like to save it as a single protein file. When I attempt to save model as a single file (option in save dialog) a PDB file is produced. However, when I open this file in other application (such as Cresset Flare) to explore molecular dynamics or docking in this newly constructed hybrid system - it opens as two different proteins. Is it possible to “merge” the parts to become a single pentameric protein, that would behave as single entity during docking or MD computations? Jacek Jagodzinski PS. I am not computational chemist, I am medicinal chemist by training and long career.

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Using Chimera/AutoDock Vina for oligomers
by Ballanah Torbett 24 May '24

24 May '24

Hello, I hope this email finds you well! I had a question about using the Chimera and its AutoDock Vina interface, as I'm relatively new to using these programs. I've been able to dock substrate onto one binding site of my protein of interest, but I'd like to apply it to the other three binding sites of the tetramer as well. I wouldn't be able to work with the monomer since the active sites are formed from the interactions between the N and C termini. I have also tried saving the session as a new PDB file and docking a new substrate, but it bound to the already-occupied site. Is there a way to dock substrate onto the other sites while "ignoring" the occupied site? Thank you! Sincerely, Ballanah Torbett 3rd Year PhD Student Gaucher Group Georgia State University

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Saving symmetry model in pdb format
by Kailash Singh Bisht 17 May '24

17 May '24

Hello ChimeraX team I am trying to export the symmetry structure of the protomer virus protein as a pdb file but whenever I am saving that model it only saves the same protomer instead of the whole symmetry structure. Can you please help? How to export those symmetry models as PDB files -- With Regards Thanking You Kailash Singh Bisht Ph.D. Student

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Displaying angles in chimera
by Prathvi Singh 16 May '24

16 May '24

Hi Elaine, Is it possible in chimera/chimeraX to display angles between two covalent bonds like in pymol? -- Prathvi Singh, Research Fellow, Department of Biological Sciences & Bioengineering, Indian Institute of Technology, Kanpur-208016

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Difficulty with Ribbon Visualization in Chimera Software
by 罗舒月 15 May '24

15 May '24

Dear Chimera Software Team,     I hope this email finds you well. I am writing to seek assistance regarding a challenge I am facing while using the Chimera software. Specifically, I am experiencing difficulties in visualizing my protein structure in ribbon mode.     When I load my PDB file and choose the ribbon representation, the resulting visualization appears as linear segments rather than the desired helical structure. I am unsure whether this issue is related to my file or if there is a specific step or setting I am overlooking.    I would greatly appreciate it if you could provide me with guidance on how to achieve the desired helical ribbon model in Chimera or any insights on potential issues with my file. To assist you in troubleshooting, I have attached the PDB file in question, as well as an image showing the current ribbon visualization.    Thank you in advance for your time and support. I look forward to your prompt response.  Best regards, Shuyue Luo the result of my file the effect I want 发自我的企业微信

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