January 2024 - ChimeraX-users - RBVI Mailing Lists

Show side chain, main chain, and cartoon at the same time
by Zhang, Miao 22 Apr '24

22 Apr '24

Dear colleagues I am new to ChimeraX. I am trying to figure out how to show side chain, main chain, and cartoon at the same time in a protein structure. Like the one below made in other software. Could you please help? [cid:image001.png@01D9D154.CE3D4440] Best, - - - - - - - - - - - - - - - - - Miao Zhang Ph.D. Associate Professor Chapman University School of Pharmacy 9401 Jeronimo Rd, Suite 297W Irvine, CA 92618 Phone: 714-516-5478 http://www.chapman.edu/our-faculty/miao-zhang

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Missing Vina on ChimeraX
by Luigi Marongiu 03 Apr '24

03 Apr '24

Dear sir or madam, I am using UCSF ChimeraX version 1.5 (2022-11-24). I have been trying to use AutoDock Vina but there is no such command in my version. How do I install it into ChimeraX (as shown in many tutorials, Vina is part of Chimera)? Thank you. Best regards, Luigi Marongiu Ph.D., B.Sc. (Hons.)

4 6

movie record / encode
by Enrico Martinez 05 Mar '24

05 Mar '24

Dear ChimeraX users! I noticed that there is some difference in the quality of the molecular movies produced in Ubuntu or MacOSX environments. Are there some tricks to improve the quality of the animation produced on ubuntu ? Here are the commands which produced the best results: movie record size 1920,1080 supersample 4 movie encode format h264 quality higher bitrate 25000 how could I modify / add something more with the aim to obtain the best molecular animations ?? Yours sincerely Enrico

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Feature request; sort by last time file was modified in save window
by m.c.feasey2＠newcastle.ac.uk 12 Feb '24

12 Feb '24

The content of this message was lost. It was probably cross-posted to multiple lists and previously handled on another list.

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Setting transparency for multi-frame PDB
by Enrico Martinez 09 Feb '24

09 Feb '24

Dear ChimeraX users! I am working on visualization of protein-ligand complex from MD trajectory loaded as multiframe pdb via open coordset true Here is my script: #coloring ligand options color ligand & C gold style ligand sphere #transparency surface protein color byattribute kdh protein target rs palette sandybrown:coral:orangered novalue gray transparency protein 5 surfaces select zone ligand 4 protein transparency sel 55 surface The problem is only in the transparency which could be set only on the first frame but then disappears when I browse movie. How could I modify my scipr to keep the transparency on all frames ? Many thanks in advance ! Enrico

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NICE DCV graphics error
by georg.kempf＠fmi.ch 08 Feb '24

08 Feb '24

Dear ChimeraX developers and users, we would like to use ChimeraX in a virtual session using the “NICE DCV” software. We verified that OpenGL hardware rendering is working in the virtual session (glxinfo, glxgears, nvidia-smi) but when opening a structure in ChimeraX, we get the below error. We tried it with different versions of ChimeraX (1.8.dev202311220127, 1.6.1 stable) on Ubuntu 20.04.6 LTS. Since the error doesn’t appear when using ChimeraX on the physical display of the same workstation(s) (where the DCV server is running) it must be related to the virtual session context. I was wondering if anyone knows what could be the cause of the error and in which direction to look regarding debugging? This is the traceback from ChimeraX: An error occurred in drawing the scene. Redrawing graphics is now stopped to avoid a continuous stream of error messages. To restart graphics use the command "graphics restart" after changing the settings that caused the error. GLError( err = 1282, description = b'invalid operation', baseOperation = glDrawBuffer, cArguments = (GL_NONE,) ) Traceback (most recent call last): File "/chimerax/usr/lib/ucsf-chimerax-daily/lib/python3.11/site-packages/chimerax/core/updateloop.py", line 84, in draw_new_frame view.draw(check_for_changes = False) File "/chimerax/usr/lib/ucsf-chimerax-daily/lib/python3.11/site-packages/chimerax/graphics/view.py", line 188, in draw self._draw_scene(camera, drawings) File "/chimerax/usr/lib/ucsf-chimerax-daily/lib/python3.11/site-packages/chimerax/graphics/view.py", line 226, in _draw_scene shadow, multishadow = self._compute_shadowmaps(opaque_drawings, transparent_drawings, camera) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/chimerax/usr/lib/ucsf-chimerax-daily/lib/python3.11/site-packages/chimerax/graphics/view.py", line 626, in _compute_shadowmaps multishadow_enabled = r.multishadow.use_multishadow_map(shadow_drawings) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/chimerax/usr/lib/ucsf-chimerax-daily/lib/python3.11/site-packages/chimerax/graphics/opengl.py", line 1628, in use_multishadow_map self._start_rendering_multishadowmap(center, radius, size) File "/chimerax/usr/lib/ucsf-chimerax-daily/lib/python3.11/site-packages/chimerax/graphics/opengl.py", line 1711, in _start_rendering_multishadowmap fb = r.start_depth_render(self._multishadow_map_framebuffer, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/chimerax/usr/lib/ucsf-chimerax-daily/lib/python3.11/site-packages/chimerax/graphics/opengl.py", line 1356, in start_depth_render if not fb.activate(): ^^^^^^^^^^^^^ File "/chimerax/usr/lib/ucsf-chimerax-daily/lib/python3.11/site-packages/chimerax/graphics/opengl.py", line 2309, in activate fbo = self.framebuffer_id ^^^^^^^^^^^^^^^^^^^ File "/chimerax/usr/lib/ucsf-chimerax-daily/lib/python3.11/site-packages/chimerax/graphics/opengl.py", line 2305, in framebuffer_id self._fbo = fbo = self._create_framebuffer() ^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/chimerax/usr/lib/ucsf-chimerax-daily/lib/python3.11/site-packages/chimerax/graphics/opengl.py", line 2141, in _create_framebuffer fbo = self._create_fbo(self.color_texture or self._color_rb, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/chimerax/usr/lib/ucsf-chimerax-daily/lib/python3.11/site-packages/chimerax/graphics/opengl.py", line 2169, in _create_fbo GL.glDrawBuffer(GL.GL_NONE) File "src/errorchecker.pyx", line 58, in OpenGL_accelerate.errorchecker._ErrorChecker.glCheckError OpenGL.error.GLError: GLError( err = 1282, description = b'invalid operation', baseOperation = glDrawBuffer, cArguments = (GL_NONE,) ) Many thanks! Kind regards, Georg

4 3

Using GPU in chimerax
by Sharif, Omar 01 Feb '24

01 Feb '24

Hello, I am using Chimerax with a tool called DeepSSETracer, a model that performs segmentation on the secondary structure of 3d cryo density maps. I need GPUs and CUDA enabled to test the tool. When I run the model, I have a message in the log that says Cuda is not available although I am running on a machine where relevant Nvidia GPU drivers and Cuda are already installed and working properly. I am attaching the screenshot [cid:d821ceae-9b2c-4a88-a7ba-c45b2935bee2] Is there any way to enable GPU usage within the ChimeraX? Is there any way to check if ChimeraX is using GPU and CUDA? I will be waiting for your reply. Thanks in advance, Omar Omar Sharif Ph.D. student Department of Computer Science Old Dominion University Email: osharif(a)cs.odu.edu https://odu.zoom.us/my/omarsharif786

2 2

Center atom
by Cygler, Miroslaw 31 Jan '24

31 Jan '24

Hi, I just started using ChimeraX and am confronted with how to do a simple task, namely, to placer a specific atom at the centre of the screen. What is the replacement for the command “centre” in Chimera? Thanks, Mirek

2 4

opening the session made with the new ChimeraX version using old ChimeraX
by Dmitry Semchonok 31 Jan '24

31 Jan '24

Dear colleagues, I made a session (cxs) in the newest ChimeraX. It contains the models only. How can I open it in the older ChimeraX version? Maybe I can save the session in a different format to be able to open with the older version? Unfortunately, I cannot update the older version on one PC. Thank you. Kind regards, Dmitry

3 2

transparency around the model only
by Dmitry Semchonok 31 Jan '24

31 Jan '24

Dear colleagues, I have a cryo-EM 3D map and model. A model is fitted for only part of my cryo-EM map. Is there a command to make the map transparent only where the model is fitted in? Thank you. Kind regards, Dmitry

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ChimeraX-users January 2024