November 2014 - Chimera-users - RBVI Mailing Lists

Disulfide bond for minimization?
by Jean Didier Pie Marechal 11 Nov '14

11 Nov '14

Dear all, I am trying to minimize a structure with a disulfide bond. My initial pdb has a CYM residue for amino acids involved in the bridge. Chimera correctly recognize the binding. But when entering the minimization run, chimera complains about the atoms of the cysteinate residues. Before sending you files I was just wondering if this is something that is not implemented in chimera or a problem on how I prepare my structure. Best regards, JD

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new Chimera release (v1.10)
by Elaine Meng 06 Nov '14

06 Nov '14

Hello everybody, A new production release of UCSF Chimera (version 1.10) is available: http://www.rbvi.ucsf.edu/chimera/download.html Download is free for noncommercial use. Platforms: Windows, Mac OS X (including Yosemite), Linux. This will be the last release to support OS X 10.6 and 10.7. New since version 1.9: Protein contact maps color-coded by distance, PDB biounit and CATH domain web fetch, plotting all-atom and backbone RMSDs along sequence alignments (previously only alpha-carbon RMSDs), update to AmberTools 14, "vop scale" density map normalization, Modeller dialog allows specifying distance restraints, further implementation of the MultiDomain Assembler homology-modeling pipeline. More details are given below; see release notes for the full list: http://www.rbvi.ucsf.edu/chimera/docs/relnotes/1.10.html I/O, Display: * new web fetch options: PDB biounit, CATH domain * improved New Molecules preferences (initial structure display) * protein SSE (secondary structure element) inserted into up/down-arrow selection cascade * shortcuts rn, rp, ri to shift the selection to the next, previous, and intervening residues in a chain * "rainbow" command can assign a unique color to each SSE * green-magenta (trioscopic) stereo mode * new input format: COLLADA (.dae) Structure Analysis and Modeling: * new RR Distance Maps tool: protein contact maps color-coded by distance (and/or std dev, if comparing structures) * update to AmberTools 14 (new force field options) * Multalign Viewer sequence alignment window: - can plot backbone and all-atom RMSDs, not just CA-RMSDs - show feature annotations from NCBI Conserved Domain Database - search by full or partial sequence name * structure-derived amino acid substitution matrices SDM, HSDM (more choices for sequence alignment and conservation calcs) * Modeller options: thorough optimization, distance restraints * "mda" command (MultiDomain Assembler): - shows BLAST alignment in Multalign Viewer - provides more options for template selection - calls Modeller dialog Volume Data (density maps, electrostatic potential): * "vop" command new options: take pointwise minimum of two or more maps, skeletonize, normalize density maps * "vseries measure" to track isosurface area, enclosed volume, and centroid position across time series Enjoy! On behalf of the Chimera team, 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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command line filter
by Dieter Blaas 06 Nov '14

06 Nov '14

Hi, I'd like to simplify the "volume filter" command by entering it via command line. Is this possible? I'd like to filter several volumes at once with a Gaussian filter of, say, 4. Thanks a lot, Dieter ------------------------------------------------------------------------ Dieter Blaas, Max F. Perutz Laboratories Medical University of Vienna, Inst. Med. Biochem., Vienna Biocenter (VBC), Dr. Bohr Gasse 9/3, A-1030 Vienna, Austria, Tel: 0043 1 4277 61630, Fax: 0043 1 4277 9616, e-mail: dieter.blaas(a)meduniwien.ac.at ------------------------------------------------------------------------

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Issues with play radial command
by vamsee 05 Nov '14

05 Nov '14

Hello All, I am having issues with using the play radial command. I am working with a virus capsid and the play radial command scrambles all the subunits. I've tried it with different viruses and it consistently messes up. I've tried using the example script on the chimera website with little luck. I am attaching a movie to this e-mail that shows what I mean. Please advise. Thank you in advance, Vamsee

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Visualizing MDFF Runs in Chimera
by Joshua Carter 05 Nov '14

05 Nov '14

Hello, I am currently working on some MDFF simulations and have been visualizing them in chimera. I am trying to color the proteins by rmsd over the course of the simulation. I was thinking that there may be a way to do this using the attribute calculator tool between the first and last frames of the simulation. Does anyone know if this is possible or if there is a better way to do it? Josh

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how to get multi contour lines?
by Fan, Guizhen 05 Nov '14

05 Nov '14

Hi, How can I get multi contour lines like attached figure? Thank you. Guizhen[cid:6F7E8CFD-DC43-4F29-B7D7-A2F7FE4A03D6@bcm.edu]

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Help for movie
by Jhanvi Sharma 04 Nov '14

04 Nov '14

Dear all, I have just started using chimera. I am trying to make a movie for P22 Virus capsid expansion. I have made the movie for asymmetric unit morph changes using the 2XYY and 2XYZ pdb IDs. However, I am unable to do it on whole P22 capsid model. Kindly suggest the protocol I should use to get the desired result. I have seen many such movies in the articles. I am trying to achieve the same. For movie reference I am sending the link for article. http://www.sciencedirect.com/science/article/pii/S1047847705002686. I will appreciate your help. Thanks, Best regards, Jhanvi Sharma

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Visualising tunnels by MolAxis
by George Tzotzos 03 Nov '14

03 Nov '14

I’ve tried to visualise protein binding site tunnels to the bulk solvent as detailed in the instructions given in: http://www.cgl.ucsf.edu/chimera/ImageGallery/entries/cavities/cavities.html The problem I encounter is that I cannot align tunnel produced by _graph_pathway_0_all build file to the receptor. In other words, the coordinates of the receptor and the tunnel are different. Is there a way of doing this? Thanks in advance for any help. Regards George

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A question about MD movie
by Sherry Wang 03 Nov '14

03 Nov '14

Hi, Is it possible to to record a MD movie that combines several dcd files playing simultaneously, not sequentially? Thanks. Sherry Wang ******************************************************** Shu-Ying Sherry Wang, Associate Professor Department of Microbiology and Immunology National Cheng Kung University 1 University Road Tainan, Taiwan 701 Tel: 886-6-2353535 ext.5634 Fax: 886-6-2082705

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