Hi Elaine,
thank you so much for getting back to me - sorry I wasn't very clear. You are correct about it being an alphafold prediction.
after using the command alphafold contacts /A to /B, I save the pb file (Interatomic pseudobonds(*.pb)) and get something like this:
; radius = 0.2 /A:61@CA /B:60@CA #141dfbff /A:40@CA /B:88@CA #2132f8ff /A:117@CA /B:1@CA #4b70f1ff /A:48@CA /B:36@CA #141efbff /A:51@CA /B:33@CA #1a27faff /
The last column are the colors and I believe most of these are different shades of blue. With what you explained to me and me re-reading the page on Pseudobonds Colored by PAE, this is making a lot more sense, and I think I will play with the commands.
Thank you! -Renee
________________________________ From: Elaine Meng meng@cgl.ucsf.edu Sent: Wednesday, March 13, 2024 6:54 PM To: Renee Garza Cc: chimerax-users@cgl.ucsf.edu Subject: Re: [chimerax-users] question about pb file
Hi Renee, I don't think I understand your question. Pseudobond files (pb files) and color keys can both have any colors, including defined with hex codes, etc., and those two things (pseudobonds and color keys) are not tied together in any way.
Also you mention "confidence" which makes me think maybe you are talking about AlphaFold-predicted structures and maybe PDB files instead of "pb" files. PDB files just contain the structures (3D atomic coordinates) and don't have colors in them, although of course you can display them in ChimeraX with whatever colors you like. If you are displaying AlphaFold-predicted structures, there is a default ribbon coloring which maps to pLDDT confidence values, and the color key can show that default coloring:
https://rbvi.ucsf.edu/chimerax/docs/user/tools/alphafold.html#coloring
But again, you can color them any way you want, and you can also make a color key that shows any colors that you want.
The pLDDT values are put into the B-factor column of a PDB file, so if you open an alphafold-predicted PDB file you can use the ChimeraX "color bfactor" command and with the "palette" option of that command, specify whatever colors and color->bfactor value mapping that you like, and with the "key" option of that command, automatically create a color key that matches whatever palette coloring that you specified. The command and its options are explained in the help:
https://rbvi.ucsf.edu/chimerax/docs/user/commands/color.html#byattribute
The coloring by attribute such as bfactor value in ChimeraX is gradual, i.e. in the default pLDDT confidence coloring, pLDDT 100 = blue and 90 = cornflower blue, and values in between 100 and 90 are between blue and cornflower blue, and that is shown by the color key.
I hope this helps, 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 Mar 13, 2024, at 5:35 PM, Renee Garza via ChimeraX-users chimerax-users@cgl.ucsf.edu wrote:
Hi there!
I've been saving pb files and see that the colors are of varying shades and transparency. I have looked at the link regarding the color key however some colors in the pb files are not in the list. I'm wondering if there's a place to look at the degree of confidence based on color somewhere or a way to have the output with the general color like red, blue, orange, yellow, etc. instead of very specific shades.
Thanks, Renee