November 2019 - ChimeraX-users - RBVI Mailing Lists

Re: [chimerax-users] [Chimera-users] color by zone in chimeraX
by Elaine Meng 20 Nov '20

20 Nov '20

Hi Pranav, I’m Cc'ing the chimerax-users(a)cgl.ucsf.edu list (recommended for ChimeraX questions). I believe the problem is that when coloring the chains you are using “target c” which means to color only cartoons, whereas coloring by zone uses the atom colors. Since you only colored the cartoons, the atoms probably still had heteroatom color-coding. If you use “target ac” instead (even if the atoms aren’t shown), then as long as the color zone distance is big enough, I think you will get the color zones you expect. <http://rbvi.ucsf.edu/chimerax/docs/user/commands/color.html#simple> <http://rbvi.ucsf.edu/chimerax/docs/user/commands/color.html#zone> 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 20, 2019, at 10:54 AM, Pranav Shah <p.shah.lab(a)gmail.com> wrote: > > Hi Elaine and Co., > > I am trying to color a virus map with the relevant pdb file, the > series of commands I am running are as follows, > open virus.mrc > open virus.pdb > color /A plum target c > color /B lightgreen target c > color /C dodger blue target c > color zone #1 near #2 dist 3 > However, the resultant surface is rendered in splotches of red and > blue, which leads me to think the it is coloring the surface using > atom type. Could you tell me how I can get Chimera X to color the > surface using the colors of the chains only? FYI, color by zone works > flawlessly in chimera. > > Cheers, > Pranav

2 6

Map "Blobs" tool - Generate objects?
by Christophe Leterrier 11 May '20

11 May '20

Hi, I started using ChimeraX for visualization and quantification of 3D microscopy images. The "blob" tool is particularly impressive to semi-automatically segment objects of interest and measure their characteristics. However, I could not find a way to generate an independent object from the picked blobs. This makes the quantification process unreproducible as it is not possible to store the blobs in the session or automatically measure all the picked blobs. Am I wrong in the intent of the tool, or is there a way to do this? Thank you, -- Christophe Leterrier NeuroCyto lab INP CNRS UMR 7051 Aix Marseille University, France

4 5

Double and Triple Bond Stick Style
by Smith, Chase 02 Dec '19

02 Dec '19

Dear ChimeraX, I was just wondering why there is no way to represent a double or triple bond in either the ligands or the protein amino acids when viewing as a Stick or Ball-and-Stick representation? I sometimes use Chimera or ChimeraX to make visuals for my lectures, and the students often have difficulty in understanding due to the absence of the multiple bonds. I would love to have the ability to represent the double or triple bonds with multiple lines between the atoms. Thank you, Chase Smith ... ChaseSmith, PhD Chair, Department of Pharmaceutical Sciences & Associate Professor of Medicinal Chemistry School of Pharmacy MCPHS University 19 Foster Street | WorcesterMA01608 T 508.373.5717F 508.890.5618C 978.855.7203 chase.smith(a)mcphs.edu www.mcphs.edu MCPHS University Confidentiality Note: This e-mail, and any attachment to it, is intended to be confidential and might be legally privileged. It is intended solely for the use of the addressee. If you are not the intended recipient, you are hereby notified that reading, copying, disseminating or distributing this email is strictly prohibited. If you have received this e-mail in error, please immediately return it to the sender and delete it from your system. Thank you.

2 1

Segment map feature only available to Mac users ?
by WERNERT Florian 29 Nov '19

29 Nov '19

Hi ChimeraX users developers and maintainers, I've been able to experiment with the segment map<https://www.cgl.ucsf.edu/chimerax/docs/user/tools/segment.html> feature provided by Segger package on the Mac daily-build, on a colleague's Mac. However I downloaded the Linux daily build on my Linux machine and it appears that this function is not present in the menu. Is it a bug or is the "segment map" feature only available to Mac ? If this is the case, would someone be able to give some guidance on how to port the feature to Linux ? I'm quite experienced in C, C++, Java and Python coding, having the coding skills shouldn't be an issue in order to do it. Thanks, Florian W

2 2

ChimeraX stalls when trying to display surfaces from a (strange) group of atoms
by Christophe Leterrier 27 Nov '19

27 Nov '19

Hi, I'm trying to use ChimeraX to visualize Single-Molecule Localization Microscopy (SMLM) data. In short, the output of an SMLM acquisition and processing is a list of fluorophores XYZ coordinates with associated uncertainty, that can be used to reconstruct a 3D image. I have made a script that make a pdb file from these localization so that I can directly display the resulting structure as if it was a protein with a number of random atoms (the only difference is that angstroms in ChimeraX are really nanometers in my data). The rendered pqr file is here (I use a pqr pdb format to specify the radius to the localization uncertainty, hence the variable diameter of each sphere): http://www.neurocytolab.org/up/Example_File.pqr The rendering with the "Spheres" view of atoms works well, see a screenshot here: http://www.neurocytolab.org/up/Render.png However, when I try to get the enveloppe of the resulting object using the "Surfaces" display (click on Surfaces>Show), ChimeraX hangs (I'm on OSX and get the dreaded infinite rainbow beachball). Is there a chance that I can get ChimeraX to render the enveloppe object this way, or is it really too far from what it's supposed to do? I can imagine that I'm trying to use ChimeraX for something completely different than its intended use, but it definitely has a lot of potential for this. Thank you, -- Christophe Leterrier NeuroCyto lab INP CNRS UMR 7051 Aix Marseille University, France

4 4

Color key
by Ricardo Righetto 18 Nov '19

18 Nov '19

Hi, Apologies if this has already been asked or documented somewhere, but I could not find it. Is there a way in ChimeraX to create a bar showing the color scale ("Color Key" in Chimera) e.g. when coloring a map by local resolution? Thank you! -- Ricardo Diogo Righetto

2 1

How to select one of ligands which is named in different numbers
by Meinan Lyu 11 Nov '19

11 Nov '19

Hi, I am having trouble in how to select one of the ligands which named LIG 1, LIG 2, LIG 3, LIG 4, etc. when I hide all of them and want to specifically show LIG 1, using "show LIG 1 target a" command does not work. How to deal with this that the ligand name have a space inside? Thank you very much. Best regards Meinan

2 1

surface cap transparent when surface dust on ?
by bertrand beckert 06 Nov '19

06 Nov '19

Hi All, I have been recently trying to color a volume by a map value... So far it worked really well using the color command.... color sample #1 map #2 offset 0.1 palette " values" But my problem is the following: when I clip the volume the surface cap is now transparent... is there a way to have the surface cap not transparent but instead colored according to the map value like it is in Chimera? Also another thing, I usually do is the following: open volume1.mrc volume surfaceSmoothing true surface dust #1 lighting soft Then, when I clip through the map the surface cap is again transparent unless dust is turn off (suface undust #1)... I also tried surface cap false and then true but nothing changes... Is there a way around it? or does the surface dust function is somehow turn the surface cap always transparent? Thanks for the hard work and the nice software! Best Bertrand

3 3

Catalina woes
by ubaumann 05 Nov '19

05 Nov '19

Dear all I am trying to use ChimeraX after a clean install upgrade to Catalina, OSX 10.15.1 I get the attached error message that the software can’t be scanned for malicious code Is there any way around this, please? Same holds for Chimera ( and other programs….) Thanks a lot! Kind regards, Ulrich

2 1

ChimeraX-users November 2019