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help
by Rayna L. DeChance 13 Nov '20

13 Nov '20

Hi, I was wondering if you knew how to cut out (clip) a part of the protein and save the remaining part as a PDB file. I attached the file I was working with that has the two proteins that are aligned together and we want only a certain part of this alignment to be clip. Thank you

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distance with homotrimer
by Francesco Pietra 12 Nov '20

12 Nov '20

Hello I am trying to measure (from command line) the distance between atom NH1 in residue 27, chain M atom OG1 in residue 215, chain A command distance :27@NH1 :215@OG1 error: 6 atoms were selected. The error message is correct because the system is a homotrimer. My question: any way to specify the chains? Any of my attempts failed. Thanks for advice (getting distances from the command line would be quicker that graphically as I have a large number of disnces to measure)

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I tasser models
by Sitbon, Yoel 10 Nov '20

10 Nov '20

Hello, I hope you are doing well. I obtained prediction models from I tasser and would like to visualize them on chimera. I was able to open them but i cannot open the sequence of amino acids. Do you perhaps know how to look at them? Thank you Yoel Get Outlook for Android<https://aka.ms/ghei36>

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Fw: Chimera can't open files
by Cain, Cheryl A 09 Nov '20

09 Nov '20

Please see the question below. Thanks, Cheryl Cheryl Cain cheryl.cain(a)ucsf.edu Operations Coordinator, Department of Pharmaceutical Chemistry Accreditation Project Coordinator, School of Pharmacy UCSF ________________________________ From: Jie Yang <jieyang(a)scripps.edu> Sent: Monday, November 9, 2020 4:12 PM To: chimera(a)cgl.ucsf.edu <chimera(a)cgl.ucsf.edu> Subject: Chimera can't open files Hi there, I have a problem that my Chimera can’t open/fetch .PDB files in my Mac(see attached). I believe the problem was because I accidentally denied access of Chimera to the Users/jieyang/Downloads. Could you let me know how should I reverse this? Thank you very much! Best Jie Yang [cid:8ef2ed16-18af-4541-aeab-3a4697900cb5]

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reset all models to the same center of rotation
by C.J. 06 Nov '20

06 Nov '20

Hi Chimera community, I have several models, both maps and pdbs, aligned. But the common center for rotation is far away from the model when I use "Volume Eraser". How can I reset the center for all models in command-line way? Thank you! Jianhao

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Re: [Chimera-users] PDB fetch broken
by Tom Goddard 05 Nov '20

05 Nov '20

Hi John, Try using the "Ignore any cached data" in the Chimera menu File / Fetch... panel. I suspect Chimera cached a bad file when the fetch was broken. If you use this ignore cached data option it will fetch a new copy of the file. Unfortunately when RCSB disabled their legacy web fetch the last couple days they made it so when you tried to fetch it returned an html page saying "PDB has discontinued this fetch" with an http "success" code (200). Since Chimera got the success code it assumed that html text was actually the PDB file and it cached it in ~/Downloads/Chimera/PDB Then when you try to open that same PDB file it is getting that cached html page instead of the cached PDB file. I asked RCSB to return an error code (404) on fetch so that does not happen, but they did even better and temporarily have reenabled the old fetch URLs to help Chimera users. They will still turn off the old fetch in a month or so. Tom > On Nov 5, 2020, at 6:26 AM, John Rose <rose(a)bcl4.bmb.uga.edu> wrote: > > Hi, > > Downloaded the Chimera 1.15 build but the problem still persists. > > Thanks, > > John Rose > > > John Rose Ph.D. > Associate Professor > SER-CAT Associate Director for Program > Rm. B204B > Department of Biochemistry and Molecular Biology > Davison Life Sciences Complex > 120 Green Street > University of Georgia > Athens, GA 30602-7229 > =============================== > Phone: 706-542-1750 > Fax: 706-542-3077 > > > > >> On Nov 4, 2020, at 1:28 PM, Tom Goddard <goddard(a)sonic.net <mailto:goddard@sonic.net>> wrote: >> >> Chimera PDB fetch is broken starting November 3 and a command like "open 1a0m" produces an empty model with no error. >> >> We will be putting a new version (release candidate) of Chimera on the download page today or tomorrow that fixes this. >> >> What happened is that the RCSB has shutdown the URL Chimera uses to fetch PDB files (e.g. https://www.rcsb.org/pdb/files/1a0m.pdb <https://www.rcsb.org/pdb/files/1a0m.pdb>). Although RCSB announced this long ago the Chimera development team missed that this URL was going away. >> >> Tom >> >> _______________________________________________ >> Chimera-users mailing list: Chimera-users(a)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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PDB fetch broken
by Tom Goddard 04 Nov '20

04 Nov '20

Chimera PDB fetch is broken starting November 3 and a command like "open 1a0m" produces an empty model with no error. We will be putting a new version (release candidate) of Chimera on the download page today or tomorrow that fixes this. What happened is that the RCSB has shutdown the URL Chimera uses to fetch PDB files (e.g. https://www.rcsb.org/pdb/files/1a0m.pdb <https://www.rcsb.org/pdb/files/1a0m.pdb>). Although RCSB announced this long ago the Chimera development team missed that this URL was going away. Tom

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Fwd: How to setup Nvidia 3D Vision on Ubuntu
by Tom Goddard 03 Nov '20

03 Nov '20

Here's a picture from Kenneth of the DIN and USB cables needed to use the 3D Vision emitter on Linux. > Begin forwarded message: > > From: Kenneth Satyshur <kenneth.satyshur(a)wisc.edu> > Subject: Re: [Chimera-users] How to setup Nvidia 3D Vision on Ubuntu > Date: November 3, 2020 at 11:17:18 AM PST > To: Tom Goddard <goddard(a)sonic.net> > > Actually, the pic does not have the cable in it, only the extra on-board cable that connects to the GPU and serves up the 3pin female. Here is a pic of both the din and usb cable connected to the emitter. The DIN is a must for linux. the special cable is on the left and the usb is on the right. > > kas > > > Kenneth A. Satyshur, M.S., Ph.D. > Senior Scientist, > College of Ag and Life Sciences: Department of Bacteriology; > School of Medicine and Public Health: > Departments of Biomolecular Chemistry, > Neuroscience, Oncology, and Carbone Cancer Center > (Small Molecule Screening Facility) > University of Wisconsin-Madison > Madison, Wisconsin, 53706 > 608-215-5207 >

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How to setup Nvidia 3D Vision on Ubuntu
by Tom Goddard 03 Nov '20

03 Nov '20

Hi Wei, I'd suggest using Ubuntu 20.04, the latest Ubuntu, the current Chimera 1.14 or daily build will work fine on that. I am not certain that Quadro FX 4800 graphics drivers will be available for Ubuntu 20, probably they will be, but you might want to look for that online before proceeding. That graphics cards is very old, from 2008. The other thing to know is that Nvidia discontinued support for Nvidia 3D Vision stereo glasses in 2019 https://nvidia.custhelp.com/app/answers/detail/a_id/4845 meaning those glasses and emitter will no longer work using just the current Nvidia graphics driver. But they claim that there is a separate driver for the USB emitter that allows it to work. https://www.nvidia.com/en-us/drivers/nv3dvisionusb/390_41/nv3dvisionusb-dri… <https://www.nvidia.com/en-us/drivers/nv3dvisionusb/390_41/nv3dvisionusb-dri…> I have not tried it. If you get it to work I'd be interested in hearing about it since we have an old Nvidia 3D Vision system. Tom > On Oct 29, 2020, at 6:41 PM, Wei Zhang <zhangwei(a)umn.edu> wrote: > > Hi Tom, > > Hope everything is well. > > One university's computer lab recently retired some workstations that were used for 3D visualization before. I managed to get a couple workstations with the 3D glasses and emitters. But I need to reinstall the operating system on those machines. > > The graphic card of the workstation is Nvidia Quadro FX4800. > The emitter is NVIDIA P854. > The glasses are NVIDIA-P854 and ViewSonic-PGD250. > > I plan to install Ubuntu. I am wondering which version of Ubuntu is suitable for using UCSF Chimera. Do we need to install cuda to make it work? Do we need to install an older version of Chimera? > > Sorry I just sent the message to you to follow the previous chain of conversation. Shall I email the chimera-user in the future with such questions? > > Thank you, > > Wei >

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Capping in VRML
by Greg Williams 02 Nov '20

02 Nov '20

When I export a vrml file to process in my Cinema 4D application, the ends of the helices, coils and sheets are capped at the ends with a material that is different then the material I use to color the secondary structure features. In Cinema 4D, I have to change every capped end individually. Where do I change the vrml export settings so that the individual objects are capped with the right material? Thanks!

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