February 2011 - Chimera-users - RBVI Mailing Lists

Ray Tracing Transparent Surfaces
by Damian Ekiert 22 Feb '11

22 Feb '11

Hello, Is it possible to raytrace a transparent surface in Chimera? I tried raytracing the frames of a movie where I fade in a surface, but the surface just appears abruptly, solid and black, then fades to the desired colors as the transparency approaches zero. Do I need to fiddle with the POVray settings or what? Any suggestions/work-arounds would be appreciated! Thanks, Damian Ekiert

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Selective surface colouring of aminoacids by hand
by Heinrich Lünsdorf 22 Feb '11

22 Feb '11

To whom it may concern. Dear colleagues, I am a novice in working with Chimera and a practicing electron microscopist. I learned to fit X-ray model data into EM-densities. My special question acutally is to select several surface exposed aminoacids by hand (either as a sequence ' aa #x to #y' or single aa '#5,67,577,579' etc.) as they have been epitope-mapped by antibodies and colorize them uniquely in the "MSMS main surface" mode of Chimera. How to colorize at the 'ribbon' I know already but I need this selective colorization at the 'Actions --> Surface --> Solid' level. How can I do this? Thank you coridally for your help in advance. Heinrich Lünsdorf ................................................................................................................................... [cid:image002.jpg@01CBD272.30DFF740] ________________________________ Helmholtz-Zentrum für Infektionsforschung GmbH | Inhoffenstraße 7 | 38124 Braunschweig | www.helmholtz-hzi.de Vorsitzende des Aufsichtsrates: MinDir'in Bärbel Brumme-Bothe, Bundesministerium für Bildung und Forschung Stellvertreter: MinDirig Heiko Gevers, Niedersächsisches Ministerium für Wissenschaft und Kultur Geschäftsführung: Prof. Dr. Dirk Heinz; Ulf Richter, MBA Gesellschaft mit beschränkter Haftung (GmbH) Sitz der Gesellschaft: Braunschweig Handelsregister: Amtsgericht Braunschweig, HRB 477

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animation suggestions
by Dougherty, Matthew T 18 Feb '11

18 Feb '11

1) It would be helpful for debugging to have script command that would halt scripting, after which a dialog box or a keyboard command could continue or restart the script. 2) sometimes when doing a reset command (e.g. kf1 to kf2) the trajectory crashes through something in the middle, so another intermediate keyframe (e.g., kf1.1) has to be created to dodge flying through an atom, requiring two reset commands to get from kf1 to kf2. Figuring out where & when kf1.1 should be placed is problematic. It would be helpful to have a debug mode that would allow stepping through the individual frames of a reset command. 3) having a optional frame count stamped on the images would be helpful for debug and non-linear editing. 4) sometimes using an icosahedron to start off a virus animation is preferred, particularly a wireframe icos. Having the ability to adjust the diameter of the line is which, which can be done in an obscure way. Being able to adjust it as a slider from the icos panel would be easier, and being able to dynamically change it through script interpolation would be a good addition to the animation commands in the experimental code. 5) I prefer to keep up with the daily builds & submitting bug reports. The inertia is having to reinstall the animation commands and other plug-ins from the experimental code every time on different computers. Having a more automated way within chimera to include these packages (user developed plugins) during installation of chimera, like a checkbox list that automatically pulls the plugins off the website or local disk. thanks for the good product. Matthew Matthew Dougherty National Center for Macromolecular Imaging Baylor College of Medicine

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animation suggestions
by Elaine Meng 18 Feb '11

18 Feb '11

Begin forwarded message: > From: Elaine Meng <meng(a)cgl.ucsf.edu> > Date: February 18, 2011 12:12:35 PM PST > To: "Dougherty, Matthew T" <matthewd(a)bcm.edu> > Subject: Re: [Chimera-users] animation suggestions > > Well, there's always "stop" but it quits from Chimera, which may not be what you want. It does allow you to keep the entire contents of a script (you don't have to make a shorter version just to stop in that place). > Elaine > > On Feb 18, 2011, at 11:59 AM, Dougherty, Matthew T wrote: > >> Thanks Elaine & Tom, >> >> Is there a way to issue the escape key within a script? >> >> I thought of another suggestion: >> >> 6) Just like overwriting a file, a dialog comes up to verify the overwrite or an command option to ignore in a write script command; something similar for savepos would prevent a lot of missteps. For example, when I have two session files I am merging, the second session clobbers the first session keyframe names if they are identical, which may or may not be desirable. >> >> >> Matthew Dougherty >> National Center for Macromolecular Imaging >> Baylor College of Medicine >> ________________________________________ >> From: Elaine Meng [meng(a)cgl.ucsf.edu] >> Sent: Friday, February 18, 2011 1:25 PM >> To: Dougherty, Matthew T >> Cc: chimera-users(a)cgl.ucsf.edu >> Subject: Re: [Chimera-users] animation suggestions >> >> Hi Matt, >> A few comments on your issues #1 and #3: >> >> (1) Command script execution can be aborted by pressing the Esc (escape) key, or paused/resumed with Shift-Esc. There is also a "pause" command, >> >> <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/pause.html> >> >> after which you could resume executing the script by pressing any key other than Esc or End, or abort execution by pressing End. >> >> (3) I'm thinking it can be done with the commands "perframe" "alias" and "2dlabels" >> <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/perframe.html> >> <http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/2dlabels.html> >> >> e.g. >> open 2gbp >> 2dlab create count xpos .05 ypos .05 >> alias ^framecount 2dlab change count text $1 color orange >> perframe framecount 3; roll y 1 90; wait; ~perframe >> >> I'm not sure how to exactly synchronize that with the start of movie recording, however. Maybe it would do that if the movie record command was right before the perframe command in the same line, separated by semicolon. Also, of course this is not as convenient as an automatic built-in counter. >> >> I hope this helps, >> Elaine >> ----- >> Elaine C. Meng, Ph.D. >> UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab >> Department of Pharmaceutical Chemistry >> University of California, San Francisco >> >> On Feb 18, 2011, at 12:21 AM, Dougherty, Matthew T wrote: >> >>> 1) It would be helpful for debugging to have script command that would halt scripting, after which a dialog box or a keyboard command could continue or restart the script. >>> >>> 2) sometimes when doing a reset command (e.g. kf1 to kf2) the trajectory crashes through something in the middle, so another intermediate keyframe (e.g., kf1.1) has to be created to dodge flying through an atom, requiring two reset commands to get from kf1 to kf2. Figuring out where & when kf1.1 should be placed is problematic. It would be helpful to have a debug mode that would allow stepping through the individual frames of a reset command. >>> >>> 3) having a optional frame count stamped on the images would be helpful for debug and non-linear editing. >>> >>> 4) sometimes using an icosahedron to start off a virus animation is preferred, particularly a wireframe icos. Having the ability to adjust the diameter of the line is which, which can be done in an obscure way. Being able to adjust it as a slider from the icos panel would be easier, and being able to dynamically change it through script interpolation would be a good addition to the animation commands in the experimental code. >>> >>> 5) I prefer to keep up with the daily builds & submitting bug reports. The inertia is having to reinstall the animation commands and other plug-ins from the experimental code every time on different computers. Having a more automated way within chimera to include these packages (user developed plugins) during installation of chimera, like a checkbox list that automatically pulls the plugins off the website or local disk. >>> >>> >>> thanks for the good product. >>> >>> Matthew >>> >>> >>> Matthew Dougherty >>> National Center for Macromolecular Imaging >>> Baylor College of Medicine >>> _______________________________________________ >>> Chimera-users mailing list >>> Chimera-users(a)cgl.ucsf.edu >>> http://plato.cgl.ucsf.edu/mailman/listinfo/chimera-users >> >> >> _______________________________________________ >> Chimera-users mailing list >> Chimera-users(a)cgl.ucsf.edu >> http://plato.cgl.ucsf.edu/mailman/listinfo/chimera-users >

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Kaspersky warning
by snoze pa 17 Feb '11

17 Feb '11

While working with chimera my anti virus dtected following virus. Is it a virus or something else. http://imageshack.us/photo/my-images/651/chimeracopy.png/

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Disulfide Bond Question
by Wesley Chen 16 Feb '11

16 Feb '11

Hi, I can make the disulfide bonds show up between two cysteine resides, but I would like to draw the bond between the two alpha carbons. Right now, I can only draw the disulfide bond itself (which just shows a bar that's parallel to both cysteines) or the whole ball/stick model where all the atoms in the residues show up. I'm just trying to draw a simple bond structure between two cysteines (which is already provided in the pdb file). Thanks, Wesley

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Question
by Larry Simpson 16 Feb '11

16 Feb '11

Is there a program to convert Zeiss "zvi" files which are obtained using a Zeiss fluorescence microscope to "MRC" files (Eman files - cryoelectronmicrosopy single particle reconstructions)? I would like to be able to visualize these 3D files using Chimera. Thanks. Larry

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Labels of Metal atoms
by Michael Day 15 Feb '11

15 Feb '11

How do I make the default label for metal atoms be upper and lower case? For instance in an iron compound, if I issue label ~H from the command line the result will be FE1 where I prefer Fe1, etc., etc. This is true for all two letter atom names. Thanks Cheers, Mike <<< ------------------------------------------------------------------------>>> Dr. Michael W. Day Director - X-ray Crystallography Lab & Molecular Observatory California Institute of Technology Mail Code 139-74 Pasadena, CA 91125 <>< <>< <>< <>< <>< <>< <>< <>< <>< <>< Beckman Institute, Room 116 Phone: (626) 395-2734 Fax: (626) 449-4159 e-mail: mikeday(a)caltech.edu <<< ------------------------------------------------------------------------>>>

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choose a specific rotamer
by Elisabeth Ortega 15 Feb '11

15 Feb '11

Hi all, I'm trying to do a script to display the "best" rotamer of all the rotamers that the funcion getRotamers give to me. I use the function useRotamers to display them but now I only want to display the rotamer with the less number of clashes and the highest number of h-bonds. I know that getRotamers return to us a list with all the rotamers of an aminoacid sorted by probability but I don't have any idea about how display only one of the rotamers. Anyone know how I can do it? Thanks in advance. Elisabeth Universitat Autònoma de Barcelona (Spain)

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Image size reduction
by compchem compchems 15 Feb '11

15 Feb '11

Hello. Dear Chimera users, Is it possible to save part of session screen, not whole picture? I just need in high-resolution illustration. With my best wishes, Dmitry Yegorov.

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Chimera-users February 2011