- ChimeraX-users - RBVI Mailing Lists

Spherical mask
by Grundmann,Lorenz Emanuel 10 Aug '23

10 Aug '23

Dear chimerax-team, I am looking into a possibility to generate a spherical volume in chimerax that I can then use as a spherical mask for focused 3D classifications and signal subtractions. For my specific need, a sphere would be the ideal shape. So far I managed to generate a surface model using the ‘shape sphere’ command, to place it to the region of interest and resampling it onto the coordinate system of my protein of interest. Is there any possibility to transform the surface model into a (binarized) volume? Best, Lorenz

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Re: Advice on handling cofactor-protein electrostatic interactions
by Boaz Shaanan 08 Aug '23

08 Aug '23

Thanks Elaine, I'll do just that. 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 ________________________________ From: Elaine Meng <meng(a)cgl.ucsf.edu> Sent: Tuesday, August 8, 2023 11:57 AM To: �� <bshaanan(a)bgu.ac.il> Cc: ChimeraX Users Help <chimerax-users(a)cgl.ucsf.edu> Subject: Re: [chimerax-users] Advice on handling cofactor-protein electrostatic interactions Hi Boaz, If you use Coulombic it will automatically calculate the charges, as in my example of 1qs0 with the TPP residue. I.e. you don't have to do it in a separate step first, and in fact it may be better if you do not: if you use Add Charge first, it will also add hydrogens and make the surface a lot bumpier. If you just use Coulombic the hydrogens are added only on a temporary copy that is in memory, not on your model, and the coloring will be applied to the smoother molecular surface without hydrogens. You just need to substitute the cofactor residue name for ":tpp" in my example, if it is not TPP. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco > On Aug 8, 2023, at 7:09 AM, Boaz Shaanan via ChimeraX-users <chimerax-users(a)cgl.ucsf.edu> wrote: > > Hi Elaine, > > Thanks a lot for the detailed reply and (as always) very helpful suggestions. I'll experiment first with the Chimerax coulombic surfaces and trick to include the cofactor. This sounds attractive, certainly for the TDP case as a starting point. As for derivatives of TDP, which are already included in the pdb, I guess I should follow the 'Add Charges' guide, right? > > Thanks again. > > 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 > > > > > From: Elaine Meng <meng(a)cgl.ucsf.edu> > Sent: Monday, August 7, 2023 10:17 PM > To: �� <bshaanan(a)bgu.ac.il> > Cc: chimerax-users(a)cgl.ucsf.edu <chimerax-users(a)cgl.ucsf.edu> > Subject: Re: [chimerax-users] Advice on handling cofactor-protein electrostatic interactions > > Hi Boaz, > This answer addresses coloring by electrostatic potential (ESP). Calculating the electrostatic interaction per se (energy?) is somewhat different and not something that ChimeraX does. > > ChimeraX can color some surface, which could be a molecular surface, by the values in a 3D map, which could be electrostatic potential (ESP). See "color electrostatic" > <https://imsva91-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=https%3a%…> > > The ESP map can come from a Poisson-Boltzmann calculation (APBS, DelPhi, others) or from a more simplistic Coulombic calculation which can be done directly in ChimeraX. > > Poisson-Boltzmann calculations require atomic coordinates, partial charges, and radii, but the different programs differ in how you input these values. > > If I recall correctly, APBS takes as input a pqr file (q means charge, r means radii) which would usually be generated by PDB2PQR, but you said PDB2PQR throws out the nonstandard residues like cofactors, I guess because it doesn't have charges for them. ChimeraX assigns radii and can assign atomic partial charges (via lookup table for standard residues and Antechamber calculation for nonstandard residues like cofactors). However, ChimeraX does not write pqr format. Also in ChimeraX, these partial atomic charges are for all atoms (i.e. all hydrogens explicit) and not a united-atom model (in which hydrogens on carbons are merged with those carbons so that they become implicit) which is often used for Poisson-Boltzmann calculations. So if you wanted to go the APBS route, in ChimeraX you would add hydrogens and charges, then save the cofactor radii and atomic partial charges (atom attributes "radius" and "charge") in the attribute file format, and if you were using a united-atom charge model, manually generate united atoms from CH, CH2, and CH3 groups in the cofactor by adding the hydrogen charges to those of the carbons where they are attached and figuring out the appropriate united-atom radii, then reformat the cofactor atom coordinates, radii and charge values into pqr format and then add these lines to your protein pqr file from PDB2PQR, then use the resulting combined pqr file as input to APBS to get the ESP map that includes cofactor contributions. > > Actually I don't even know if APBS would accept that pqr file or not, but that is what I imagine you would try. So let's assume the APBS calculation will run using that pqr file. > > Then you would open the APBS ESP map that includes cofactor contributions in ChimeraX and color the molecular surface. If the cofactor is covalently attached to the protein then the protein molecular surface may already include it. However, if the cofactor is not covalently attached, you would need to tell ChimeraX specifically to lump it inside of the same surface as the protein with the "include" option of "surface" when you are calculating and displaying the molecular surface. > > The "coulombic" approach wil do more of these steps for you, given the "include" trick as well as the "surfaces" option of the "coulombic" command, but calculating ESP with the relatively simplistic Coulomb's law method. For example, 1qs0 chain A includes a noncovalently bound TPP residue and I could show the surface including the TPP and colored including its potential contribution: > > open 1qs0 > surf include :tpp > coulombic surfaces #1.2 > > <https://imsva91-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=https%3a%…> > <https://imsva91-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=https%3a%…> > > See first image attached with :tpp selected (green outline surface patch) > > If you don't use the "include" and "surfaces" options in these commands, the surface will be redrawn to include only the protein part with the TPP outside of it, like other ligands and the Coulombic ESP will not include the TPP contribution. See second image attached. > > I hope this helps, > Elaine > ----- > Elaine C. Meng, Ph.D. > UCSF Chimera(X) team > Department of Pharmaceutical Chemistry > University of California, San Francisco > > <Screen Shot 2023-08-07 at 7.08.37 PM.png><Screen Shot 2023-08-07 at 7.12.43 PM.png> > > >> On Aug 7, 2023, at 4:10 PM, Boaz Shaanan via ChimeraX-users <chimerax-users(a)cgl.ucsf.edu> wrote: >> >> Hi, >> >> I would like to present effects of mutations around cofactors (TDP derivatives) on the protein - cofactors electrostatic interactions. I use APBS and chimerax to display the electrostatic surface potential of the protein, but since PDB2PQR eliminates the cofactor from the pqr file I need a tool for the cofactor surface potential. I'm wondering what tool I should use for this. Is it Antechamber+chimerax or something else? >> Is there by chance a demo for such scenario? >> I'd appreciate your advice. >> 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 >> >> >> >> >> _______________________________________________ >> 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://imsva91-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=https%3a%… > > _______________________________________________ > 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://imsva91-ctp.trendmicro.com:443/wis/clicktime/v1/query?url=https%3a%…

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Re: [Chimera-users] Saving phi psi values to a text file
by Elaine Meng 07 Aug '23

07 Aug '23

Hi Prathvi, In Chimera there is no command to save attributes. Instead you have to use the Render by Attribute dialog's File menu as described in the bottom section of this page: <https://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/render/render.ht…> In ChimeraX, as far as I know you can only save one attribute to a file at a time with the "save" command. However, it would probably work just to use the "save" command several times and then (outside of ChimeraX) concatenate the multiple files into one file afterward. <https://rbvi.ucsf.edu/chimerax/docs/user/commands/save.html#attributes> Another idea is that in ChimeraX you can list attribute values in the Log with the "info" command, e.g. info residues protein attribute phi So an alternative approach if you don't need the file to be in the attribute-file format is to use "info" multiple times and then save the Log contents to an HTML file with "log save" -- see help pages for those commands: <https://rbvi.ucsf.edu/chimerax/docs/user/commands/info.html#residues> <https://rbvi.ucsf.edu/chimerax/docs/user/commands/log.html#save> I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco > On Aug 5, 2023, at 10:14 AM, Prathvi Singh via Chimera-users <chimera-users(a)cgl.ucsf.edu> wrote: > > Hi Elaine, > > Is there a command to save the phi and psi angle values of each residue of a PDB file in a text file using UCSF chimera? > > I know we can do this in chimeraX using the command: save C:\myphi.defattr attrName phi format defattr model #1 > > Also, can we use chimeraX to save the phi and psi values in a single file? > > Thanks in advance >

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Query regarding selection
by Prathvi Singh 04 Aug '23

04 Aug '23

Hi Elaine, I want to select all the atoms except the backbone oxygen and nitrogen atom of residues 100.A to 120.A . Is there a command to do this in either chimera or chimeraX? -- Prathvi Singh, Research Fellow, Department of Biological Sciences & Bioengineering, Indian Institute of Technology, Kanpur-208016

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Pseudobonds question
by Aleksei Solomonov 02 Aug '23

02 Aug '23

Dear ChimeraX Developers, I apologize for disturbing you, I have a question, how can I make pseudobonds in ChimeraX similar to Chimera? I mean when I try to create hydrogen bonds, by default, in Chimera (Tools->structure analysis->findHbonds) they appear as lines (or sticks), connected to the structure (left image). But if I export the model and import it in ChimeraX bonds become "disconnected". The same appeared if I place H-bonds directly in ChimeraX (right image). If I select pesudobond, an option of changing its length manually is unavailable. The structure is attached if needed. [cid:image002.png@01D9C590.A8D2F3A0] Thank you in advance! Best regards, Aleksei

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Missing functions for scripting
by Vincent Mallet 28 Jul '23

28 Jul '23

Hello, Thanks a lot for the awesome tool ! I have a question about how to use some commands that are not yet included in the python API : for instance "measure volume". I can run it using a cxc with : */usr/bin/chimerax --script measure.cxc --nogui --exit* Where *measure.cxc *contains looks like : *open test.mrc volume #1 level 0.42 measure volume #1* I don't understand how to do the same with a python script. Is there some way to use chimerax.tools(measure area/volume) to get this tool to work from within a python script ? My use case is that I am running this measurement for different thresholds, and I would like those thresholds to depend on the value of previous thresholds, hence I need looping. For now, I am calling subprocess on the .cxc command above from a python script, but this means that I need to load the mrc every time... Thanks in advance for your help ! Best, Vincent

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Determining Chirality
by steffen＠sthomas.de 27 Jul '23

27 Jul '23

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Download ChimeraX
by songlu 26 Jul '23

26 Jul '23

Dear ChimeraX developers, Thank you for taking the time to read my email. I have a question about downloading ChimeraX and I hope you can help me. When I downloaded the MacOS version of the ChimeraX1.6 on the official website, I found that the download always failed. After trying to switch the browser and the network, it still doesn't work. Perhaps you can help me solve the problem or send me the installation package for the MacOs version of the ChimeraX1.6. I would greatly appreciate it. Looking forward to your reply. Sorry again for the delay in your valuable time. Wishing you a pleasant day. Yours respectfully, Songlu

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transparency for different selection
by Enrico Martinez 26 Jul '23

26 Jul '23

Dear ChimeraX users! I am dealing with the visualization of protein embedded into the plasmatic membrane (composed of water and lipids). Here is my script preset publication 1 rainbow protein palette $palette # for protein surface protein #color protein cornflower blue transparency 95 target s # for lipids surface :OL,PA,PE color :OL coral target s color :PA coral target s color :PE orangered target s hide bonds; hide atoms transparency 55 target s 1) I would like to set different values of the transparency for the surface of lipids and protein. For the moment I found only one possibility to set the transparency for the whole surface indicated above. Would it be possible to selectively apply a transparency command on the particular selection of the system ? 2) how would it be better to visualize the water in the same system in order to maintain the visibility of the protein ? Many thanks in advance Enrico

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How do you refine a structure with a new (or modified) amino acid residue in Isolde
by Trevor Sewell 25 Jul '23

25 Jul '23

Hi Everyone, I am adding residues (essentially modified cysteines ) to the polypeptide chain. e.g. HETATM 1 N2 PGR 0 1.743 -1.624 -0.731 1.00 0.00 N HETATM 2 C1 PGR 0 -0.077 -0.207 -0.018 1.00 0.00 C HETATM 3 C2 PGR 0 1.394 -0.544 0.203 1.00 0.00 C HETATM 4 C3 PGR 0 -0.485 0.927 -0.717 1.00 0.00 C HETATM 5 C4 PGR 0 -1.034 -1.073 0.503 1.00 0.00 C HETATM 6 C5 PGR 0 -1.840 1.189 -0.887 1.00 0.00 C HETATM 7 C6 PGR 0 -2.389 -0.810 0.331 1.00 0.00 C HETATM 8 C7 PGR 0 -2.794 0.323 -0.364 1.00 0.00 C HETATM 9 C8 PGR 0 2.379 0.585 -0.085 1.00 0.00 C HETATM 10 H1 PGR 0 1.529 -0.961 1.213 1.00 0.00 H HETATM 11 H2 PGR 0 0.232 1.599 -1.120 1.00 0.00 H HETATM 12 H3 PGR 0 -0.727 -1.940 1.035 1.00 0.00 H HETATM 13 H4 PGR 0 -2.145 2.053 -1.418 1.00 0.00 H HETATM 14 H5 PGR 0 -3.116 -1.477 0.733 1.00 0.00 H HETATM 15 H6 PGR 0 -3.837 0.527 -0.497 1.00 0.00 H HETATM 16 H7 PGR 0 1.655 -1.298 -1.705 1.00 0.00 H HETATM 17 H8 PGR 0 1.143 -2.449 -0.581 1.00 0.00 H HETATM 18 O18 PGR 0 3.393 0.026 -0.528 1.00 0.00 O HETATM 19 SG PGR 0 2.777 1.511 1.356 1.00 0.00 S HETATM 20 CB PGR 0 1.349 2.524 1.801 1.00 0.00 C HETATM 21 CA PGR 0 1.698 3.446 2.926 1.00 0.00 C HETATM 22 N PGR 0 0.565 4.254 3.182 1.00 0.00 N HETATM 23 C PGR 0 2.646 4.407 2.450 1.00 0.00 C HETATM 24 O24 PGR 0 2.145 5.309 1.717 1.00 0.00 O HETATM 25 O25 PGR 0 3.976 4.409 2.828 1.00 0.00 O HETATM 26 H9 PGR 0 1.980 1.252 -0.806 1.00 0.00 H HETATM 27 H11 PGR 0 1.044 3.140 0.942 1.00 0.00 H HETATM 28 H12 PGR 0 0.527 1.867 2.099 1.00 0.00 H HETATM 29 H13 PGR 0 2.043 2.881 3.803 1.00 0.00 H HETATM 30 H14 PGR 0 -0.245 3.721 3.480 1.00 0.00 H HETATM 31 H15 PGR 0 0.359 4.821 2.336 1.00 0.00 H TER My question is: How do I set up Isolde so that it can refine the structure? Many thanks, Trevor Sewell Disclaimer - University of Cape Town This email is subject to UCT policies and email disclaimer published on our website at http://www.uct.ac.za/main/email-disclaimer or obtainable from +27 21 650 9111. If this email is not related to the business of UCT, it is sent by the sender in an individual capacity. Please report security incidents or abuse via https://csirt.uct.ac.za/report-incident

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Regarding replacing Aspartate with Isoaspartate
by Protya, Satirtha 24 Jul '23

24 Jul '23

Hi Everyone, Hope this email finds you well. I am Satirtha Saha, an undergrad research assistant at UIUC. I am facing a new issue. In one of my peptide PDB file, I need to change the Aspartate Amino Acid with Iso Aspartate Amino Acid. I have been trying to do so, but not sure how to do that. Is there any way or package that can do that? Please let me know. Hope to hear from you soon. Have a great day. -- Yours sincerely Satirtha Saha He/Him/His Beloit College | Class of 2025 Triple Major | Biochemistry, Cognitive Science and Data Analytics Research Assistant | Sweedler Lab | UIUC Admissions Ambassador | Office of Admissions, Beloit College Funding Board Member | Beloit Student Government (BSG) +1(608) 473-6615<tel:+16084736615> Schedule an Appointment<https://admissions.beloit.edu/portal/chat?utm_source=www.beloit.edu&utm_med…> sahass(a)beloit.edu<mailto:sahass@beloit.edu> [Image][Image]

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Questions on Visualizing Chromatin Structure and Gene Expression in ChimeraX
by 刘致远 24 Jul '23

24 Jul '23

Dear UCSF ChimeraX Team, I am a big fan of your program and I have been greatly impressed with its capabilities. I want to express my deep appreciation for the "soft" visualization option provided in ChimeraX - the aesthetics truly appeal to me. I've been utilizing ChimeraX to visualize my chromatin structure data. While I'm aware this might not be one of the intended uses, when I simulated the 3D structure of chromatin as a protein's cif file, the result looked fantastic. Now I've encountered a challenge and I am hopeful that you might be able to provide some guidance. I am looking to represent gene expression as the size of the spheres in my chromatin structure, all in one figure. I am aware that Chimera has a method using "vdwdefine", essentially using the size of the B-factor to represent the atomic radius. Could you guide me on how to achieve this in ChimeraX? Furthermore, if I want to include multiple columns similar to the B-factor, how can I add them to the cif? Using the "defattr" command feels a bit cumbersome. It would be very convenient if I could pack a lot of dimensional information (such as the gene density of this chromatin segment, CG content, chromatin opening degree, etc.) into a single cif file. Do you have any suggestions or strategies on how to achieve these somewhat unconventional functionalities? Your assistance would be greatly appreciated. Thank you for your attention and I look forward to hearing from you soon. Best Regards, Zhiyuan Liu

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Fwd: depicting contacts
by Eric Pettersen 24 Jul '23

24 Jul '23

> Begin forwarded message: > > From: Krishnan Raman <RKrishnan(a)BIOCRYST.com> > Subject: depicting contacts > Date: July 24, 2023 at 9:50:11 AM PDT > To: "chimerax-users-owner(a)cgl.ucsf.edu" <chimerax-users-owner(a)cgl.ucsf.edu> > > Hi all, > Any ideas to depict a dramatic improvement(200 nm to femtomolar) in binding affinities before and after mutations(about seven) in chimerax? > II have tried contacts , swapaa etc. nothing seems dramatic enough for visuals > Thanks > > > Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for Windows > > > > > CONFIDENTIALITY NOTICE > > This email, including any attachments, may contain confidential or legally privileged information that is intended only for the individual or entity to whom it is addressed. If you are not the intended recipient, please be advised that any dissemination, distribution or copying of this email and any attachment is strictly prohibited. If you have received this email in error, please reply to the sender so that BioCryst Pharmaceuticals, Inc. can take corrective measures and then permanently delete this email and any attachment, including any printed copies. Thank you. >

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Fwd: RFdiffusion in ChimeraX?
by Tom Ferrin 24 Jul '23

24 Jul '23

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Swapaa doubt
by Krishnan Raman 24 Jul '23

24 Jul '23

Hi, How do I use swapaa to do mutations on seven to ten residues in one command? Thanks Krish Krishnan Raman Executive Director, Structural Biology BioCryst Pharmaceuticals CONFIDENTIALITY NOTICE This email, including any attachments, may contain confidential or legally privileged information that is intended only for the individual or entity to whom it is addressed. If you are not the intended recipient, please be advised that any dissemination, distribution or copying of this email and any attachment is strictly prohibited. If you have received this email in error, please reply to the sender so that BioCryst Pharmaceuticals, Inc. can take corrective measures and then permanently delete this email and any attachment, including any printed copies. Thank you.

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L-D isomers
by Íñigo Izal Azcárate 21 Jul '23

21 Jul '23

Hi everyone, Is there any way of changing the isomerism of protein residues from L to D? I use ChimeraX with students and it would be great to see what happens with some features of the structure like hydrophobicity after changing isomers. Thanks so much in advance Iñigo Izal Azcárate Personal de Apoyo a la Docencia, Coordinador del programa Science and Business Departamento de Bioquímica y Genética T: 948 425600, ext 6321 inizal(a)unav.es -- *Este mensaje puede contener información confidencial. Si usted no es el destinatario o lo ha recibido por error, por favor, bórrelo de sus sistemas y comuníquelo a la mayor brevedad al remitente. Los datos personales incluidos en los correos electrónicos que intercambie con el personal de la Universidad de Navarra podrán ser almacenados en la libreta de direcciones de su interlocutor y/o en los servidores de la Universidad durante el tiempo fijado en su política interna de conservación de información. La Universidad de Navarra gestiona dichos datos con fines meramente operativos, para permitir el contacto por email entre sus trabajadores/colaboradores y terceros. Puede consultar la Política de Privacidad de la Universidad de Navarra en la dirección: **https://www.unav.edu/aviso-legal* <https://www.unav.edu/aviso-legal>**** ** ** *This email message may contain confidential information. If you are not the intended recipient of this message or their agent, or if this message has been addressed to you in error, please immediately alert the sender by reply email and then delete this message and any attachments. The personal information included in email messages exchanged with employees of the University of Navarra may be stored in the database of your interlocutor and/or the servers of the University for the time-period stipulated by its internal information storage policy. The University stores such data for purely administrative purposes, to facilitate e-mail contact between its employees and third parties. The University of Navarra Privacy Policy may be accessed at https://www.unav.edu/aviso-legal <https://www.unav.edu/aviso-legal> ***** ** ** _Antes de imprimir este mensaje o sus documentos anexos, asegúrese de que es necesario. Proteger el medio ambiente está en nuestras manos. Before printing this e-mail or attachments, be sure it is necessary. _It is in our hands to protect the environment.__

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Re: Chimera X: Protein-Ligand Docking
by khawar siddiqui 21 Jul '23

21 Jul '23

Hi Tom,We were wondering if it is possible to include Protein-ligand docking in the next ChimeraX version. That will benefit lots of researchers also by having it within the same package. Thanks and best wishes Dr K Sohail Siddiqui,School of Biotechnology and Biomolecular Sciences (BABS),Room 420, Building D26,The University of New South Wales (UNSW),Randwick, High Street, Sydney, Australia. NSW 2052Office: +61 2 938 55193email: z3030204(a)ad.unsw.edu.au; sohailsiddiqui1995(a)yahoo.com best wishes Dr Khawar Sohail Siddiqui On Friday, 7 July 2023 at 11:25:48 am AEST, khawar siddiqui <sohailsiddiqui1995(a)yahoo.com> wrote: Hi Tom,That will be really great if the next ChimeraX version has the Animation tool so less experienced researchers who find command line difficult can prepare protein structure movies using simple clicks. Thanks a lot for considering the suggestion. Waiting eagerly for the next version with animation tool.The ChimeraX is an amazing visualization tool. Best wishesSohail Sent from Yahoo Mail for iPhone On Friday, July 7, 2023, 5:15 am, Tom Goddard <goddard(a)sonic.net> wrote: Hi Sohail, We have funding to develop a ChimeraX animation tool like the one in Chimera but better. It is part of a 4 year NIH grant that started about 9 months ago that funds a lot of the ChimeraX development. We have not started on the animation tool and it will probably take about 6 months to develop once we start on it. Tom On Jul 4, 2023, at 11:46 PM, khawar siddiqui via ChimeraX-users <chimerax-users(a)cgl.ucsf.edu> wrote: Hi Developers,ChimeraX is a great tool for protein researchers and a vast improvement on the previous Chimera. However, ChimeraX has one limitation for users who dislike command lines. Kindly incorporate the Animation movie maker facility in a New Version under Tools/utilities as was in the previous version. It was so quick and simple by using GUI. Thanks a lot Dr K Sohail Siddiqui,School of Biotechnology and Biomolecular Sciences (BABS),Room 420, Building D26,The University of New South Wales (UNSW),Randwick, High Street, Sydney, Australia. NSW 2052Office: +61 2 938 55193email: z3030204(a)ad.unsw.edu.au; sohailsiddiqui1995(a)yahoo.com Sent from Mail for Windows _______________________________________________ ChimeraX-users mailing list -- chimerax-users(a)cgl.ucsf.edu To unsubscribe send an email to chimerax-users-leave(a)cgl.ucsf.edu Manage subscription:

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Regarding Usage of ChimeraX for PDB file creation
by Protya, Satirtha 21 Jul '23

21 Jul '23

Hello, Hope this email finds you well. I am Satirtha Saha, an undergrad research assistant at UIUC. Currently, I am using ChimeraX for one of my research projects. I need to build structures and download the PDB files. I can do that for all L amino acid containing peptides, but I don’t know how to use ChimeraX for D amino acid containing peptides. For example, I have a sequence NWF. Now it is available in this standard L format and also in NdWF format. As ChimeraX is not case sensitive, I don’t know how I should give the command to build the structure with D amino acid containing peptide. Secondly, I have some peptides that have Amidation or NH2 at the C terminus. I don’t know how to add this to my structure. Please let me know how to solve this to issues. That will be really helpful for me. Have a great day. -- Yours sincerely Satirtha Saha He/Him/His Beloit College | Class of 2025 Triple Major | Biochemistry, Cognitive Science and Data Analytics Research Assistant | Sweedler Lab | UIUC Admissions Ambassador | Office of Admissions, Beloit College Funding Board Member | Beloit Student Government (BSG) +1(608) 473-6615<tel:+16084736615> Schedule an Appointment<https://admissions.beloit.edu/portal/chat?utm_source=www.beloit.edu&utm_med…> sahass(a)beloit.edu<mailto:sahass@beloit.edu> [Image][cid:image002.png@01D9BB19.9CD8CA10]

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Matching ChimeraX color with the Adobe illustrator colors?
by Rayees Mattoo 20 Jul '23

20 Jul '23

Dear ChimeraX users, I am trying to match the colors of ChimeraX model to the Adobe illustrator drawing. I used Web safe colors to color my model in chimeraX and then used the same hex codes in the illustrator, but the colors did not match. Any thoughts or workarounds would be appreciated. Best Rayees

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Re: Opening MTZ Files
by Elaine Meng 20 Jul '23

20 Jul '23

Hi Natalie, Everything I know on this topic is written in the documentation linked below, and yes, as it says therein, you do need to have Clipper installed. Then title of the section is "Open/Save Options from Clipper": <https://rbvi.ucsf.edu/chimerax/docs/user/commands/open.html#clipper> I can't think of anything else to say without getting more details from you. What is the problem? Which part are you confused about? What did you try? What happened? Did you follow the instructions in the link? Thanks, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco > On Jul 6, 2023, at 9:14 AM, Natalie Walsh <natalie.walsh(a)slu.edu> wrote: > > Hello, I previously asked a question (sent to the wrong email, oops!) about not being able to use MTZ maps in Chimera X (I was using 1.17.1, I just installed 1.17.2 today and still have the same issues). These were the instructions previously provided: > > "The instructions of how to open MTZ files with ChimeraX are here: > > <https://urldefense.com/v3/__https://rbvi.ucsf.edu/chimerax/docs/user/comman… > > > "Opening an MTZ file requires specifying an already-open atomic structure with the structureModel option..." with example command, etc." > > I read through the like and am still confused. I have also installed the Clipper Plugin (although I am unsure if it was installed correctly) since I saw somewhere that might be needed. > > Thanks, > Natalie Walsh

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Running ChimeraX in batch mode on Mac OSX
by Enrico Martinez 20 Jul '23

20 Jul '23

Hello Greg, In addition to my previous message regarding running Chimera-X on Ubuntu, I have a similar question regarding MacOSX. In fact I have a macbook pro equipped with the Mojave (10,14.16) which I used with ChimeraX-1.3 that worked well in no-gui mode (without any additional flags like --offscreen). I've tried more recent releases of Chimera-X and found that it has not worked with Mojave. Anyway, if I do an update would it be possible to use the latest ChimeraX on Mac without gui ? Many thanks in advance Enrico

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colour palette of multiple models
by Enrico Martinez 20 Jul '23

20 Jul '23

Dear Chimera-X users ! I am performing visualisation of multi domain protein loaded in the Chimera-X as different pdbs. In the model panel each pdb coloured differently according to the model ID and everythings is OK for the first 11 models, while starting from the 12th all of them are colored in green (please see the screen-shot). Would it be possible to quickly change the auto-colouring of the multiple pdbs when I load all of them directly using chimerax workdir/*.pdb ? Many thanks in advance Enrico

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Running ChimeraX in batch mode in the Ubuntu terminal
by Enrico Martinez 20 Jul '23

20 Jul '23

Dear ChimeraX users ! I have a quick technical question. Typically I run ChimeraX with a batch script in order to perform some manipulation with input pdb and print the output image / save chimera-X session. In my Ubuntu terminal I run it using: chimerax script.cxc where the script could be something like : ### open input.pdb # do some manipulation like view, orient etc save image.png exit ## It works OK but, while running from linux terminal I have a quickly open-closed Chimera-X window which is not very practical when I put this script in loop etc. Is there any possibility to fully suppress the Chimera-X gui when I run my script in batch mode from the terminal? Many thanks in advance Enrico

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Feature request: support for MRC mode 12 (float16)
by Ricardo Righetto 20 Jul '23

20 Jul '23

Dear ChimeraX team, It seems that ChimeraX (tested version 1.6.1) does not yet support MRC data mode 12, corresponding to half-precision floating point (float16). This data mode is now supported in RELION-4 and IMOD, and is interesting to save storage in cryo-ET and subtomogram averaging workflows. Would it be possible to implement support for reading and writing this MRC data mode in ChimeraX? Thank you! Best wishes, -- Ricardo Diogo Righetto

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Q3 Score Calculation Tool ChimeraX that is similar to MapQ Plugin in Chimera
by Thu Nguyen 19 Jul '23

19 Jul '23

Good afternoon, I am calculating the Q-Scores in cryo-EM density maps and found the MapQ Plugin <https://github.com/gregdp/mapq> in Chimera that does Q3-score calculation and visualization. I wonder if we have a similar plugin in ChimeraX that does Q-score calculation? Thank you very much. Best regards, Thu

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