June 2007 - Chimera-users - RBVI Mailing Lists

Origin question with maps
by Eduardo Sanz-Garcia 29 Jun '07

29 Jun '07

I found that the origin of /mrc/ maps is read correctly and can be used to place one map in respect of another. For example: 1.mrc (origin: 10,0,0) is going to be shifted 10 pixels with respect of map 0.mrc (origin: 0,0,0). I can not reproduce the same behavior with CCP4 format (.map) . The origin is not read correctly. Thank you.

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conjoined unit cells
by Bartosz Siemiński 29 Jun '07

29 Jun '07

Hi all, I was working with Chimera for some time, beeing convinced I don't need no help, until I'd got to this. Is there a possibility of conjoining several (let's say four, nine or sixteen) unit cells? I use the el. density map (converted to cpp4, so it could be loaded by Chimera) for structural alignment and such an operation would be very usefull. Thanks in advance, Bartek ____________________________________________________________________________ Czy już jesteś w Yahoo!? Masz dosyć spamu? Poczta Yahoo! dysponuje najlepszą ochroną przed spamem http://pl.mail.yahoo.com

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mrc maps
by Gorelik, Tatiana 29 Jun '07

29 Jun '07

Hi, I image an .mrc map in Chimera. The surface map is displayed using a selected range. As a result I see blobs. I want to be able to select such a blob and get back its 3d information - coordinates, etc... Would it be possible to implement this feature? Greetings, Tatiana ************************************ Tatiana Gorelik, PhD, Institut für Physikalische Chemie Johannes Gutenberg-Universität Mainz Welderweg 11 55099 Mainz Germany Tel.: 0049 6131 39 22347 Fax: 0049 6131 39 23768 e-mail:gorelik@uni-mainz.de ************************************

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Reading a data set from a text file
by Kyaw Zeyar Myint 29 Jun '07

29 Jun '07

Hi, I am Kyaw Myint, a summer intern at NIAMS branch of NIH. I am working under the supervision of Dr. Bernard Heymann from the Lab of Structural Biology research. The project I am working on currently is to improve the 3D reconstruction of viruses' structures from 2D electron micrographs. The programs I am using include Chimera and Bsoft. For the project, I want to read in a data set from a text file and display the 3D surfaces based on that data set. I'd like to use Chimera for that purpose and I'd really appreciate any suggestion or comment on how I should do that. Thank you very much for your help in advance. Looking forward to hearing from you soon, Kyaw

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rotating items in chimera
by William Jeffrey Triffo 29 Jun '07

29 Jun '07

hello, is there a way to return to a rotational position, without using 'savepos' and 'reset'? For instance, if I don't want to reset translation(s) (which using savepos/reset might do), but just want to return to a 'top down' view, or a specific rotation with respect to the viewer's global axes? I realize that with multiple objects in potentially different rotational orientations, this would require which object to use to calculate the rotation. thanks, -Jeff

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Transformation matrices
by Eduardo Sanz-Garcia 29 Jun '07

29 Jun '07

I am getting the rotation matrices (I am not interested in the translation column) using matrixget command. My naive question: Should I use in this way: x' x y' = [3x3 matrix] y z' z or in this other way? z' z y' = [3x3 matrix'] y x' x Thank you very much.

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IMOD mesh/surface colors
by William Jeffrey Triffo 28 Jun '07

28 Jun '07

hi, is there a way to control the color of surfaces generated from IMOD meshes in Chimera? when I select a surface, and pick a new color in the color editor, I notice that the color of the 'IMOD contours' in the Model Panel changes, but that there is no change in the color of the actual rendered surface. thanks, -- ------------------------------------------------------------- Jeff Triffo Auer Group, Donner Lab, Lawrence Berkeley National Laboratory Raphael Group, Bioengineering Department, Rice University Medical Scientist Training Program (MSTP), Baylor College of Medicine phone (Berkeley): 510-486-7940 fax (Berkeley): 510-486-6488

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Use of a copyrighted figure for software review note
by Anselm.Horn＠chemie.uni-erlangen.de 27 Jun '07

27 Jun '07

Dear all, sorry, if this is a bit off-topic, but I did not find any e-mail address more suitable on the Chimera website. As I learned from the CCL there is a new Chimera version out. I think this would be a nice opportunity to write a short software review note (approx. 1 column) in the "Nachrichten aus der Chemie", the members journal of the German Chemical Society GDCh, in order to inform a broad public of Chimera. For this I'd like to use the graphic "DNA and Netropsin" from the Chimera Image Gallery, in case there is space enough to have a figure printed as well. The image, however, is marked copyrighted, and thus I'd like to know, whether I may use it for my purpose and what statement/copyright notice should be included in the figure caption. Thanks in advance. Best regards, Anselm

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how to "connect" two proteins
by Damir Perisa 26 Jun '07

26 Jun '07

hi all, maybe this is a little bit too far over the capabilities of chimera, but i hope somebody can help me or give input. i would like to connect two PDB structures into one chain of aminoacids. one PDB is from one globular domain, the other is from another globular domain including linker. i would like to try to put them together and see how (what possible conformations) they fit together. what orientations are possible and how it would look like (visualisation, making movies, convincing non-scientists, ...). i could edit the PDB files in a text editor, but i would not want to calculate the cordinates by hand first - are there no tools to glue together chains? thanx for any input how to do this with chimera or any other programme, best regards, Damir -- Damir Perisa Master Student Biozentrum, University of Basel Department Biochemistry / Focal Area Infection Biology Klingelbergstrasse 50-70 CH-4056 Basel, Switzerland phone: +41 61 267 1492

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Question on Chimera
by Ki Kim 25 Jun '07

25 Jun '07

Hello, I would like to know what is the best way to draw the surface of the binding site of a protein. I would like to add some water molecules to the protein and treat these water as part of the protein. Thank you for your help. Sincerely, Ki Kim

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Chimera-users June 2007