- Chimera-users - RBVI Mailing Lists

Recording actions
by Nikolay Igorovich Rodionov 10 May '12

10 May '12

Hi all, Is there any way to get a read out of all of the operations I have performed within a session? I know of the command history option but that only record the commands I have entered in the command line. I would like to be able to record my command line and non-command line actions, in the order they occurred. Thank you, Nikolay Rodionov

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Writing image to a file using Chimera python script
by Dan Cohen 10 May '12

10 May '12

Hello all, Is there a python interface for exporting images to a file in the UCSF Chimera. I understand I can use runCommand("copy") or runCommand("export"). Is there a python class for doing such commands? Thank you, Dany

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Re: [Chimera-users] [chimera-dev] Dividing a model into seperate models - one for each chain
by Tom Goddard 09 May '12

09 May '12

Hi Mateusz, The "split #0" command produces separate models for each chain. They are numbered #0.1, #0.2, #0.3, ... with the same primary id number (0) and different secondary id numbers. You can use these two-part id numbers in any Chimera command (e.g. color blue #0.2), or you can refer to all the models using #0. There is currently not a way to change the id numbers of models. Tom > Hello, > > Is there a command / a way to split a model into seperate models (one > for each chain)? I know there is the "split" command, but it divides > the model into submodels. > > Mateusz >

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keyboard accelerator "es" doesn't not work after open the command box
by Weimin Wu 09 May '12

09 May '12

A command box was open to input a sym command to generate 60 copies of a pdb structure on the virus capsid surface. Does anybody know how to close this command box? because the keyboard accelerator "es" always goes to command line instead of erasing the density I specified. It is really annoying. Weimin

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Add-H to water O
by Francesco Pietra 09 May '12

09 May '12

Is it possible with CHIMERA to add-H selectively to O atoms to get H-bonded water molecules? I used REDUCE to add-H (-build flag) but was unable to get H2O from O atoms, although het database is in place. What I am trying to get is a reasonable H-bonded water for a highly hydrated protein, before submitting to MD to actually see h-bonding. thanks francesco pietra

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hydrogen bonds in Chimera
by Beale, John 09 May '12

09 May '12

I have a model of a ligand docked in the active site of a receptor protein. I want to visualize only the hydrogen bonds between ligand and receptor- not for the entire protein. Is this possible in Chimera? John John M. Beale, Jr., Ph.D. Professor of Medicinal Chemistry and Pharmacognosy Saint Louis College of Pharmacy 4588 Parkview Place Saint Louis, Missouri 63110-1088 Office: 314-446-8461 Cell: 314-315-0409 FAX: 314-446-8460 John.Beale(a)stlcop.edu<mailto:John.Beale@stlcop.edu>

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Glassy surface in Chimera
by John Squire 08 May '12

08 May '12

Hello, I am trying to show a density map as a glassy surface within which various molecular chains have been fitted. Can anyone please tell me how to produce such a glassy surface for the density map in Chimera? Thanks, John Squire Professor John M Squire, Muscle Contraction Group, School of Physiology and Pharmacology, University of Bristol, University Walk, Bristol BS8 1TD. United Kingdom. Visiting Professor Imperial College London (44) (0)1722 421734 j.squire(a)imperial.ac.uk j.m.squire(a)bristol.ac.uk -------------------------------

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NMR
by MESHAL ALMUALLIMI 07 May '12

07 May '12

Hello, How can I show only the average of my NMR solved structure? As when I fetch the PDBID 1YJR it shows all the structures aligned and I only need the average. I figured out how to eliminate as much structures as I can but I am interested in taking the average of all. Regards Meshal MS candidate Georgetown University

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Chelation of Calcium with Citrate
by Nancy 06 May '12

06 May '12

Hi All, I would like to find the stoichiometry for the chelation of a calcium ion (Ca 2+) with a citrate ion (citrate 3-), as well as the equilibrium constant or free energy of calcium-citrate complex formation. x*Ca2+ + y*citrate3- <=> z*calcium-citrate-complex (x, y, and z are the stoichiometric coefficients) Thanks in advance, Nancy

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Amber Force Field
by Forbes J. Burkowski 04 May '12

04 May '12

Hi: I have noticed that scripts can start with: import MMTK import MMTK.ForceFields from MMTK.ForceFields import Amber94ForceField We are doing some side chain packing studies that would benefit from the availablity of "easy" force field calculations. Currently, the algorithm works with useRotamers() to set two neighbouring rotamers and this is followed by a simple energy calculation to evaluate the interaction energy between the two rotamers. Right now, the energy calculation is only a bit more sophisticated than a steric collision detector. Question: Can we use some functions in the MMTK.ForceFields module to get an improved energy calculation? Any suggestions would be appreciated. Cheers, Forbes

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