March 2011 - Chimera-users - RBVI Mailing Lists

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by Hernán Costa 28 Mar '11

28 Mar '11

Hi I need to obtain mutation on differents sites on a protein but i can´t. How can I create a mutual mutation an know if the rotamer selected is Ok? Thanks Hernán Costa

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Energy Minimisation Citation
by Nancy 28 Mar '11

28 Mar '11

Dear All, I used the "Minimize Structure" feature of Chimera to minimize several ligand molecules in preparation for docking (with the "Gasteiger" charges option). I need to cite this in an article that I am to submit for publication, and I need a bibliography of the software, including a description of the minimisation algorithm, force field, etc... Please let me know how I should go about this? Thank you very much, Nancy

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RMSD Calculation
by Nancy 27 Mar '11

27 Mar '11

Hi All, I need to determine the RMSD of a small molecule cocrystallized ligand, against a large number of predicted docked conformations. Please let me know what is the best method for doing this. Thank you very much, Nancy

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displaying DelPhi results
by Knut Langsetmo 26 Mar '11

26 Mar '11

Hi, I have done a DelPhi calculation on my protein, and when I try to display it, I get the error: "File cam.phi, format delphi Record size 1852798752 > file size 26826676" Any suggestions would be greatly appreciated. Thanks, --Knut

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Automated RMSD Calculations
by Nancy 25 Mar '11

25 Mar '11

Hi All, I would like to calculate RMSDs of a large number of small molecule conformations against a reference conformation, is there a simple software program or method that can be used to perform such calculations? Thanks in advance, Nancy

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Chimera production release candidate (1.5.3)
by Elaine Meng 25 Mar '11

25 Mar '11

A Chimera production release candidate (version 1.5.3) is now available: <http://www.cgl.ucsf.edu/chimera/download.html> Please try it and report any problems. The 1.5 series includes 64-bit versions and will be the last for X11 on Mac (not to worry, the native Mac versions will still be supported). See the release notes for changes relative to previous versions of Chimera: <http://www.cgl.ucsf.edu/chimera/1.5.3/docs/relnotes/1.5.html> Relative to 1.5.2, version 1.5.3: - corrects line width in saved images (affects mesh, silhouette edges, and other lines such as H-bonds) - fixes error on Windows associated with non-Unicode usernames - turns multisampling off by default on Macs (it was associated with bad behaviors on some Mac systems) Elaine ----- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco

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installation problem
by estrella＠cartuja.csic.es 23 Mar '11

23 Mar '11

Hi, I´ve tried hardly to intall the last Chimera version for Windows (chimera 1.5.3rc), but at the phyton execution time, I have this message: "Unable to execute file: C\Archivos de programa\Chimera 1.5.3rc\phyton.exe Create process failed; code 14001" Ifound this error and it possible solution in internet, without any success. Could you help me? Thanks so much Estrella

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Re: [Chimera-users] chimera help...please...
by Eric Pettersen 23 Mar '11

23 Mar '11

On Mar 23, 2011, at 2:32 AM, Amit Kumar wrote: > > Dear Pettersen, > first of all I like to thanks you as i am getting always nice > graphics from chimera software and hope you still involve in > improving it to compete all over good structure visualizers.... > I am a frequent user of this visualizer and already cited in all my > papers internationally published. I am struggling in getting ... I'm happy you've gotten good results with Chimera, and thanks for the citations -- they help us get our funding renewed! > 1) user guide of UCSF Chimera in pdf version as whole If you go to the Chimera home page and click on the "Documentation" link, there will be a list of links to various documentation. One of those links will be for a PDF of the 1.5 version of the User's Guide. It's about 12.5 MB (828 pages). The Chimera documentation was always designed to be hyperlinked web pages, so the PDF version is not as well organized or concise as it would be if the documentation was PDF-based. I hope you know that the HTML User Guide is bundled with each Chimera download and therefore all the Help buttons in dialogs, the "help" command, and the various functions in the Help menu just access your local copy and don't go over the web. > 2) if i build structure - add atom in structure ----whether we can > plced the atom at my desired place or coordination...if yes > how...and whether i can dragg that atom specifically to some unique > place....how? The atom gets placed in the center of the view, so if you can get the center of the view to be your desired location then you're set. Otherwise, you can use the "Movement Mouse Mode" tool (in the Movement tools category) to move the atom wherever you want it positioned. > 3)whether we can allign the specific atom/residue and accordingly > whole molecule....how? Although i use match maker that allign whole > molecules but my specific residue miss out Use the "match" command to match specific atoms/residues. Open the command line (Favorites->Command Line) and type "help match" for details. As an example if you wanted to match residue 14 in model 0 with residue 20 in model 1 (and they were the same residue type with the same atom names) then "match #0:14 #1:20" will move model 0 so that its residue 14 will be superimposed on model 1's residue 20. > 4)how i can allign heteroatom like in my case i am trying to allign > heme from different hemoglobin molecule with maximum efficiency...as > heme are chemically same for both molecule it should allign > perfectly and accordingly their globin (apoprotein) part... Similarly, if the hemes have the same number of atoms and the same atom names then something like "match #0:HEM #1:HEM" would work (also assuming only one heme per model). If the hemes have differing numbers of atoms or different atom names then you would have to use a more detailed match command where you actually specify the atom names so Chimera knows which atoms to pair up in the match. --Eric Eric Pettersen UCSF Computer Graphics Lab http://www.cgl.ucsf.edu

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DNA atomic structure fitting with an envelope
by Damien Larivière 22 Mar '11

22 Mar '11

Dear all, James Stroud or Thomas Bishop webservices among others enable to create a portion of DNA in the PDB format. Is it possible in Chimera to import a mesh envelop (see image), the PDB structure of the DNA portion and to force the DNA to fit with the envelope (which has the length and the diameter of the DNA portion)? Many thanks for your help Damien ps: As far I understand, the MDFF tool by Klaus Schulten allows to conform a PDB structure to a mesh (interesting for cryoEM). I have not tested it yet.

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Offsetting residue numbering
by Sumitro Harjanto 22 Mar '11

22 Mar '11

Hi Elaine, Is there a way to introduce a systematic offset to the residue numbering in a model? The numbering in my model is different from the convention. Eg. the methionine that's supposedly in position 5 is labeled as MET 4, alanine in position 6 as ALA 5, and so on. I can't do it manually cos there are many residues. Is there an easy way to resolve this other than using a script to automatically assign the labels? It'll be good if i can resolve this from the root , such that my atom specification is also consistent with the naming convention I use. :) Cheers, Sumitro Institute for Infocomm Research disclaimer: "This email is confidential and may be privileged. If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you."

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