- Chimera-users - RBVI Mailing Lists

Contact_area Arguments
by Kevin Wang 06 Dec '19

06 Dec '19

Hi, I am using python to calculate contact area between 2 chains. My code is as follows p1, p2 = [s.surface_piece for s in openModels.list(modelTypes=[MSMSModel])] y = measure.contact_area(p1, p2, 2.5) However, this returns the error: TypeError: contact_area() takes at least 4 arguments (3 given) This is the function for contact_area def contact_area(p1, p2, d, color = None, offset = None, slab = None, smooth = False, optimize = True): What is the 4th required argument? Best, Kevin

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pseudobond problem while writing mol2 format
by Palani, Kirubakaran 06 Dec '19

06 Dec '19

Hi All, I have a PDB file and want to convert the PDB to MOL2 format. The PDB has missing residues which is not a problem but when I write to MOL2 format it assigns the pseudobond and I really no need of it. I tried to solve it by checking the thread but I am not getting a clear solution for my problem. Last, I am doing this by using the script as I have >1000 PDBs to process the same way so the command line would be preferred. PS: I send you the molecule in PDB format as an example case. Thanks in advance, Kiruba ________________________________ This electronic message is intended to be for the use of the named recipient, and may contain information that is confidential or privileged. This communication may contain protected health information (PHI) that is legally protected from inappropriate disclosure by the Privacy Standards of the Health Insurance Portability and Accountability Act (HIPAA) and relevant Pennsylvania Laws. You can direct questions concerning PHI or HIPAA to the Corporate Compliance and Privacy Officer at (215) 707-5605. If you are not the intended recipient, please note that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this message in error, you should notify the sender immediately by telephone or by return e-mail and delete and destroy all copies of this message.

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Opening Amira segmentations
by Tom Goddard 06 Dec '19

06 Dec '19

Unfortunately Chimera does not handle Amira segmentation files. Maybe we can add that to ChimeraX or next generation program. What kind of segmentations do you have? Are they surfaces? Or are the per-voxel index maps? Tom > On Dec 5, 2019, at 12:02 PM, Guo, Wangbiao <wangbiao.guo(a)yale.edu> wrote: > > Thank you, Tom. So, what kind of Amira segment files can I open with Chimera? > >> On Dec 5, 2019, at 3:00 PM, Tom Goddard <goddard(a)sonic.net <mailto:goddard@sonic.net>> wrote: >> >> The error message says your Amira file does not contain BoundingBox in the header. That line tells ChimeraX the size of the 3D image data in the file. I suspect it means your Amira file does not contain 3D image data (instead it might have segmentation surfaces or some other Amira objects). The Chimera Amira reader only handles 3d image data. >> >> Tom >> >> >>> On Dec 5, 2019, at 11:36 AM, Guo, Wangbiao <wangbiao.guo(a)yale.edu> wrote: >>> >>> >>> >>> >>> <Screen Shot 2019-12-05 at 2.32.48 PM.png> >>> >>> >>> >>> >>> >>> >>> >>> >>> Hi: >>> When I open my Amira label file by Chimera, I always come out with an error: cannot find “bounding box” line, can u help me to figure out? >>> _______________________________________________ >>> Chimera-users mailing list: Chimera-users(a)cgl.ucsf.edu >>> Manage subscription: https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fplato.cgl.… <https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fplato.cgl.…>

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Video about masking
by Krishan Pandey 05 Dec '19

05 Dec '19

Hi I am kind of new to Chimera and was wondering if there is a video tutorial about creating a mask in Chimera. I intend to use the mask for local resolution or multi body refinement. To experienced users this may be a novice question. I tried to search online but could find any. When I use volume eraser to delete part of EM map, it does not do anything, nothing is deleted. I am using Chimera 1.13.1 (build 41965). Any help is appreciated. Thank you Krishan Pandey

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Fitting ligands/substrates to protein structure
by Jason Jeffrey Rodencal 05 Dec '19

05 Dec '19

Hello chimera users! I've been browsing the various tutorials for chimera and I've seen a lot of amazing models of proteins bound to DNA, ligands, etc. I have a pdb file for my protein of interest and its substrate, and I have the active site of the protein. I was wondering if there's any way of predicting how the substrate fits into the catalytic cleft. Is there some easy code or application that can do this in chimera or is this a far more challenging task than I appreciate? Thank you! Jason Rodencal Dixon Lab Stanford University

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(no subject)
by Guo, Wangbiao 05 Dec '19

05 Dec '19

[cid:8911DAA1-04B5-48F5-9F7E-D075345E38BE@its.yale.internal] Hi: When I open my Amira label file by Chimera, I always come out with an error: cannot find “bounding box” line, can u help me to figure out?

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secondary structure restraints and crosslink restraints
by Fränze Müller 27 Nov '19

27 Nov '19

Dear Chimera developers, I would like to perform homology modelling using Modeller in Chimera. At the moment I am using just distance restraints formatted like in the Chimera documentation (res1 res2 dist stdev). This file only contains crosslinking data. Is there a way to also include secondary structure restraints, that can serve as additional information during homology modelling? Or can I provide some were another file including this information separate from the crosslink information? Best wishes and Thanks for your help, -- *Fränze Müller* Postdoctoral Researcher *Biochemistry and Functional Proteomics, Warscheid Lab* University of Freiburg|Schänzlestr. 1|79104 Freiburg|Germany Phone +49 761 203 2681

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Undo option?
by Luca Pellegrini 27 Nov '19

27 Nov '19

I was wondering if there are any plans for an Undo option? I just managed to wipe a detailed view of an active site with lots of side chains, by selecting one more amino acid on the ribbon drawing and then picking by mistake ’show only’ rather than ’show’ (slip of the finger). ps: I found an old post on this in 2004, explaining that there is no such option, but perhaps the Chimera authors are open to changing their mind? After all, we are using Chimera to make ever more complex drawings. Best wishes, Luca Luca Pellegrini, PhD Department of Biochemistry University of Cambridge Cambridge CB2 1GA United Kingdom lp212(a)cam.ac.uk tel.: 0044 1223 760469 https://www.bioc.cam.ac.uk/pellegrini-group/pellegrini-group @PellegriniLab

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Modification of paths
by Reza Khayat 27 Nov '19

27 Nov '19

?Hi, I've installed the headless version of Chimera and have realized that it inserts the location of the headless binary into the PATH variable. Unfortunately, I can't figure out what system file has been modified. I use a tcsh shell and the .cshrc is not modified. Any help in identifying the modified system file would be greatly appreciated. Thanks. Best wishes, Rez Reza Khayat, PhD Assistant Professor City College of New York Department of Chemistry New York, NY 10031

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Save pdb problem
by Rui Chen 25 Nov '19

25 Nov '19

Hello, I docked a ligand into a monomer, now I want to save a new pdb file. In the new pdb file, chian A will be docked monomer, chain B will be the chain B of homodimer. I already superimposed the two PDB files and deleted chain A of homodimer. I also used change chain ID to add chain IDs to the combined PDB file. However I got the following problems: 1. In my system, there are glycans (residue name: 0YB), *I cannot add chain ID to the glycans* (residue 209-216 belongs to chain A, residue 425-432 belongs to chain B) 2. In my system, I also have a small molecule docked in chain A, I realized only *the last line of the ligand was given a chain ID "h"*, is this a problem? 3. I want to *save these two PDB files as two chains, not two models* (actually it's a homodimer except for the ligand) 4. Can I manually *delete all the connections*? Looking forward to your reply. Best regards, Rui

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