April 2021 - Chimera-users - RBVI Mailing Lists

Chimera interface to Modeller
by Vonderviszt Ferenc 03 Sep '24

03 Sep '24

Hello, I have been using the Chimera interface to Modeller via a web service. This service has been down for a few days. It always stops with the following error message: Service 'opal:Modeller9v8Service' is unavailable What should I do? Please help me. Thanks, Feri

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(no subject)
by Thirumurugan Prakasam 29 Oct '21

29 Oct '21

Hi, I am trying to make metal coordination bond as a dotted line and also I need to make electron clouds around the atoms as in the picture below (Please provide me short guidelines on how to make nice cartoon). Please help me sort this two issues. Looking forward to hearing from you, Many thanks, Thiru [image: image.png] -- Thirumurugan Prakasam, Research Scientist, New York University Abu Dhabi, Experimental Research Building Building C1, Saadiyat Island Abu Dhabi, UAE Phone no: +971-561976358

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What do you do for comparative modeling if the pdb is so new it's not in UniProt?
by Ralph Loring 24 May '21

24 May '21

Hi, I'm very new to Chimera and have been working through the tutorials, including the Comparative Modeling Tutorial. However I'm stumped. I'm interested in modeling chimeric proteins that involve the following pdbs: PDB 7KOO, 7KOX and 7KOQ and I can't get the sequence in my chimera to align with the template structure in the pdbs. The problem is that the template pdbs only came out in April and are not yet included in UniProt. They are deposited in RSCB and EMDB, but these don't appear to be alignment options in Chimera. Do I need to appeal to UniProt, or is there an alternative way to make the association between the sequence and the structure? Any additional tutorials on using MAV would be helpful as there seem to be a lot of editing features that are not explored in your tutorial. Thanks for your help, Ralph Loring Associate Professor of Pharmacology Department of Pharmaceutical Sciences Northeastern University 360 Huntington Avenue Boston, MA 02115 USA 617-373-3216 office 617-373-8886 fax r.loring(a)northeastern.edu

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2D panorama view of a 3D model
by Kandolf,Susanne 30 Apr '21

30 Apr '21

Hello, I was wondering if it is possible to display a 3D model as a 2D panorama view? I would like to show all sides of a holoenzyme and instead of taking several pictures of each view, I thought it would be more convenient to have one picture displayed as panorama showing all sides at the same time. Thank you for your help, Susanne …………………………………………………………………….. Susanne Kandolf Research Technician at Haselbach Lab Mobile: +43 699 17250493 susanne.kandolf(a)imp.ac.at<mailto:susanne.kandolf@imp.ac.at> www.imp.ac.at<http://www.imp.ac.at> IMP Research Institute of Molecular Pathology Campus-Vienna-BioCenter 1 1030 Vienna, Austria Part of Vienna BioCenter www.viennabiocenter.org<http://www.viennabiocenter.org>

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Problem Saava9ng merged PDB Files
by Stephen P. Molnar 30 Apr '21

30 Apr '21

I am using Chimera v-1.14 (build 42094) on my Debian Buster Linux computer and have run into a problem saving a pdb file containing two pdb files. The files are attached to this email.This is a portion of the combined flies: The structure of the D21.pdb file isthe ball image. I followed the instructions in the Building Structures, Modifying and Saving Data in the Help pages. However, when I open DD21Mod1 in LigPlot to identify the docked ligand I get: Clearly, this is not the ligand docked int the active site. I have used LigPlot on a number of pdb files with good results and am forced to conclude that there is a problem with D21Mod1.pdb. I would appreciate help in solving this problem. Thanks in advance. -- Stephen P. Molnar, Ph.D. www.molecular-modeling.net 614.312.7528 (c) Skype: smolnar1

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problem (exit code -1073741819)
by Ichrak Benamri 23 Apr '21

23 Apr '21

Hello, I hope you are doing well. I have problem launching the chimera tool (error code: -1073741819), I don't know exactly where the problem is. Please, can you help me? Thank you [image: image.png] -- *Ichrak BENAMRI* PhD Student in Bioinfomatics *+212648548583* ichrakbenamri(a)gmail.com Systems and Data Engineering Team, National School of Applied Sciences, Abdelmalek Essaâdi University, BP1818 Route Ziaten, 90 000, Tangier, Morocco Chlamydiae and Mycoplasma Laboratory, Institut Pasteur du Maroc, Casablanca, Morocco

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Four letter residue names
by Francesco Pietra 21 Apr '21

21 Apr '21

Hi all A pdb file deriving from a mmCIF file (with chimerax) and comprising both nucleotides and proteins, shows the protein residue names with four characters (i.e., using also column 21), such as ALAM in one subunit, or GLNm in another subunit. I read on passing somewhere (and I am unable to trace that back) that chimera accepts such four character names but was unable to find a description from chimera help. I also got lost in deciphering the intricacies of mmCIF files. What is the scope of the column 21 character? Could that simply be ignored, or deleted, for use with the CHARMM FF? Thanks for advice francesco pietra

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Chimera Errors
by Henry Shook 18 Apr '21

18 Apr '21

Chimera Team, I have been using Chimera to test several Sialic Acid isomers on the Sars-CoV-2 spike protein over the past couple of months and a couple of days ago, I have been getting this error telling me that there was an "application stderr" and "application stdout". Previously to a couple of days ago, anytime I tried to run it during the day, this message would show up, however, I was able to run the docks from 9-12 pm at night without any problem, so I just worked on the docking during that time. Now, no matter what time I run the docks at, this message shows up. I have not changed any procedures from when I started until now. Is there a way I can fix this problem? I attached a screen recording of my procedures and how I arrived at the problem. Here is a link <https://drive.google.com/file/d/1QkQakaG7QnY_pjJsbdlK0HWNEuupnJqJ/view?usp=…> if the video does not load. Thanks! Henry Shook Screen Recording 2021-04-18 at 11.19.06 AM.mov <https://drive.google.com/file/d/1QkQakaG7QnY_pjJsbdlK0HWNEuupnJqJ/view?usp=…>

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ADP EM Chimera plugin
by Eric Pettersen 15 Apr '21

15 Apr '21

Hi Vilde, Since ADP EM is a third-party plugin, I don't know that I know that much more than you about how it works. Hopefully the plugin developers will get back to you. Nonetheless, I can offer some generic advice about seeing/finding the fitted structure. First, check the Model Panel (Favorites→Model Panel) to ensure that the structure model is shown (the "Shown" column for the structure model is checked). Second, type the 'window' command (Favorites→Command Line) to ensure the view is large enough to show the position of the structure. Third, click on the color well in the Volume Viewer panel (the square next to "Color") and adjust the 'A' component of the color (A = alpha, or opacity) so the the contour surface is semi-transparent, in case the structure is completely within a contour. --Eric Eric Pettersen UCSF Computer Graphics Lab > Hello, > > I’m trying to use the ADP EM molecular fitting tool (Chimera Plugin) to fit my PDB-models into a low resolution map. The plugin works as it should, but I’m having trouble visualizing the solutions. Once the fitting is finished (the table with all the coordinates is produced) and I chose for example solution 1, the PDB structure disappears in the Chimera Window. The EM map is still showing. If I click on the “Back to initial”-button, the PDB structure comes back, but in the initial position, of course. I have tried to save the solutions, but they are still not showing (the solutions are selected as “show” as a cartoon in the model panel). According to the description of the plugin developers, the solutions/fits should be visualized just by selecting one, no extra steps needed. > I’m doing something wrong in Chimera or is there a bug? > I have tried with the two latest versions of Chimera for Windows (1.14 and 1.15), with the same result. > > Any help or advice would be much appreciated! I have also tried to contact the developers of the plugin, but no response so far. > > Best regards, > Vilde Leipart > PhD-student, > > Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences > Høgskoleveien 12, 1430 Ås, Norway > > Honey Bee Research Lab, Arizona Sate University > 427 East Tyler Mall, Tempe, AZ 85287

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Pixel size/box size and map display
by Cynthia Lee Page 14 Apr '21

14 Apr '21

Hi, I have three maps to be used in Relion for reference models. All of these maps are different in pixel size and box size, however they display as the same size in Chimera, with the same size outline box. The voxel size in volume viewer is correct according to the pixel size I designated in Relion_image_handler. I assumed that these maps would be different in size since they have different pixel sizes and box sizes. Can someone set me straight on this? Many thanks, Cynthia

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