- Chimera-users - RBVI Mailing Lists

selection shadow
by jean-francois menetret 11 Feb '08

11 Feb '08

I am using the latest nightly build installed on our linux machine. If I select a PDB and move it around, the selection leaves a "shadow" behind (see attached snapshot). Thanks Jean-Fran�ois M�n�tret, PhD Boston University School of Medicine Physiology and Biophysics Department 700 Albany Street W315 Boston, MA 02118 Email: menetret(a)bu.edu Mailing address: 715 Albany Street

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split-map
by Gatsogiannis, Christos 08 Feb '08

08 Feb '08

Hello chimera team, is there any memory-limitation for the split-map tool? When i perform a segmentation of a density-map larger than ~100MB i always get a chimera-error. In order to perform the segmentation, i have to coarse the density-map with a factor of 2, as example in imagic, and then split-map works fine with the new map. The result is of course density maps with a lower resolution. My Linux-PC has 4GB of memory and my first thought was that this should be enough for the segmentation of the density map as example in 10 parts (10x100=1GB). Is there any way to circumvent this problem and perform the segmentation with the original map? Thanks Christos Gatsogiannis Christos Dipl.Biol. Cryo-EM Lab Institut for Zoology Johannes Gutenberg University 55128, Mainz Germany Tel: +49(0)6131-39-23091

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regd. DMS
by Vinay Kumar 08 Feb '08

08 Feb '08

Hello all, I had installed DMS previously. And recently upgraded my OS to fedora 8. When i try to recompile dms this is the following error i get. I did not face this the previous time!! could anyone guide me?? Regards Vinay Following is the error ----- [hpws@localhost dms]$ make cd libpdb ; make OPT="-O" make[1]: Entering directory `/home/hpws/dms/libpdb' cc -O -c -o pdb_read.o pdb_read.c pdb_read.c:25:20: error: stdio.h: No such file or directory pdb_read.c:26:20: error: ctype.h: No such file or directory pdb_read.c:27:21: error: string.h: No such file or directory In file included from pdb_int.h:20, from pdb_read.c:28: pdb.h:516: error: expected ')' before '*' token pdb.h:518: error: expected ')' before '*' token In file included from pdb_read.c:37: read_format.i:19: error: 'NULL' undeclared here (not in a function) In file included from pdb_read.c:45: pdbrun6_read.i:45: error: initializer element is not constant pdbrun6_read.i:45: error: (near initialization for 'pdbrun6[26]') pdbrun6_read.i:46: error: initializer element is not constant pdbrun6_read.i:46: error: (near initialization for 'pdbrun6[27]') pdbrun6_read.i:47: error: initializer element is not constant pdbrun6_read.i:47: error: (near initialization for 'pdbrun6[28]') pdbrun6_read.i:48: error: initializer element is not constant pdbrun6_read.i:48: error: (near initialization for 'pdbrun6[29]') pdb_read.c:59: error: expected ')' before '*' token pdb_read.c: In function 'pdb_read_string': pdb_read.c:304: warning: incompatible implicit declaration of built-in function 'memset' pdb_read.c:556: warning: incompatible implicit declaration of built-in function 'strncpy' pdb_read.c:913: warning: incompatible implicit declaration of built-in function 'sscanf' pdb_read.c:978: warning: incompatible implicit declaration of built-in function 'sscanf' pdb_read.c:992: warning: incompatible implicit declaration of built-in function 'sscanf' pdb_read.c:1027: warning: incompatible implicit declaration of built-in function 'sscanf' pdb_read.c:1047: warning: incompatible implicit declaration of built-in function 'sscanf' pdb_read.c:1076: warning: incompatible implicit declaration of built-in function 'sscanf' pdb_read.c:1094: warning: incompatible implicit declaration of built-in function 'sscanf' make[1]: *** [pdb_read.o] Error 1 make[1]: Leaving directory `/home/hpws/dms/libpdb' make: *** [pdb] Error 2

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clipping: solids or interior surfaces
by Ian Yarbrough 08 Feb '08

08 Feb '08

Hello, Is there any way to color the interior face of a surface (when exposed by clipping) a different color or shade than the outside surface? Or a way to show the interior as a volume instead of a cavity? Essentially I'm looking for the same thing as this fellow describes in his post on the following date: *Andrew Jewett* aij at physics.ucsb.edu <chimera-users%40cgl.ucsf.edu?Subject=%5BChimera-users%5D%20clipping%20%28interior%20surfaces%20and%20solids%29&In-Reply-To=Pine.LNX.4.44.0502252312570.5796-100000%40localhost.localdomain> *Mon Feb 28 16:56:34 PST 2005* http://www.cgl.ucsf.edu/pipermail/chimera-users/2005-February/000287.html He describes it much more elegantly than I can. Was this feature was ever implemented? Thanks and cheers, Ian Yarbrough Texas A&M University Biochem/Biophysics Dept 832-858-9278

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locating models in maps by unit cell transformations
by Trevor Sewell 08 Feb '08

08 Feb '08

Hi, It often turns out that the atomic model you create in O needs to be transformed by a crystallographic symmetry operation in order to fit into the map created by refmac. In O this is no problem because the map automatically covers the bit of model you put in the center of your screen. However this does not seem to happen in Chimera. Is there an easy way to make the map cover the model (i.e. without working out what the transformation is and then creating a transformed pdb file)? Many thanks Trevor

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using IDLE
by Ben Keshet 07 Feb '08

07 Feb '08

Hi, I am interested in performing the same actions several times on several different structures. For example: open a file, select the histidines, delete them, save and close. Is IDLE the right tool for that? I opened the python shell (Tools-> General Controls-> IDLE) but could not open files or manipulate them using the shell. I have no knowledge in python. What is the best way to write scripts to execute commands repeatedly? If IDLE is the tool, how can use it to do that? Is there a written source for that? Do I need to master python first? Many thanks, Ben

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clipping related models identically
by Eric Pettersen 06 Feb '08

06 Feb '08

Raven Huang asks (paraphrased): > I have four related structures that I want to show in cutaway view, > with the cut being in the same place in all the structures. How > can I do that? The technique varies depending on whether you are clipping using the global clip planes (i.e. the ones shown in the Side View), or with per-model clip planes (from the Per-Model Clipping tool). Both techniques share the same setup step though: open all your models and get the parts you care about superimposed. If the starting coordinates are already "in the same reference frame" then you don't have to do anything but open the models. Otherwise you will have to superimpose them either with the MatchMaker tool or the "match" command. There is a discussion of using those here: http://www.cgl.ucsf.edu/chimera/current/docs/UsersGuide/tutorials/ images.html#matching To view just one of the structures at a time, use the Model Panel (Favorites->Model Panel) and use the buttons in the Shown column (or the Show Only button in the button list) to show one structure/ surface. Now for adjusting the clip plane... Global clipping: open the Side View and adjust the near clip plane until it is cutting where you want it to. Per-model clipping: use the Per-Model Clipping tool to adjust the clip plane of the visible model until it is cutting where you want it to. Then choose one of the other models you want to cut from Per- Model Clipping's "Model:" menu. Enable clipping and click the "Align plane" button once you have chosen the original model in the menu next to the button. The model clip planes will now be aligned. Once the models are all clipped, you can either show then individually (the Model Panel again) and save separate images, or move them apart using the "move" command and save one combined image. --Eric Eric Pettersen UCSF Computer Graphics Lab http://www.cgl.ucsf.edu

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Planes feature in the Volume Viewer
by William Jeffrey Triffo 06 Feb '08

06 Feb '08

hi, when using the Planes tool in Volume Viewer, are the planes numbered from 0 or 1? I loaded a contour using the IMOD import, where I had drawn the contour on slice 12 of a volume; however, it appears that the plane that transects the contour in Chimera is '11' when using the Planes tool. I tried to test the enumeration by exceeding bounds (150 slices are in the volume, so was expecting an error for an entry of '150' if it was enumerated from zero), but it appears that slice indices outside the range of the loaded volume just default to the limit in either direction (typing in '200' just sets it to the highest-enumerated slice). -- ------------------------------------------------------------- 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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Contact/clash detection for HETATMs
by Jonathan Magasin 05 Feb '08

05 Feb '08

Hello, I'm trying to use the clashes/contacts tool to explore valid phi/psi angles for L- and D-Ala (as part of a homework assignment; developing a Ramachandran plot for each). The tool worked great for L-Ala but does not report any contacts for D-Ala. (For each, I've snipped just the relevant sections out of a larger PDB. I'm using default params for collision detection, with detection calculated for any movement.) The difference in the PDB's for L-Ala and D-Ala is that the latter are in HETATM records. I did include the CONNECT info (to explicitly tell Chimera how HETATMs bond) but that did not help. Perhaps there's something else I must include, or some modification I can make to the HETATMS (element labeling?) so that collision detection will work as with peptides? Or is this a known limitation? (Is there a list of known limitations? I'm a new user.) I'm not Note that the distance tool works for D-Ala. If I can get collision detection to work, it take much less time. Thanks in advance. -Jonathan

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Aligning two residues same name
by Elaine Meng 05 Feb '08

05 Feb '08

> Changing residue name works. Deleted membrane, saved pdb without > membrane. > Loaded the two models. Command line: match :XXX :YYY Hi Francesco, You can still use the name without changing it, for example open 4hhb open 4cpp preset apply interactive 1 match #1:hem #0:hem.a ~ribbon This matches the single heme residue of 4cpp (#1) to the chain A heme of 4hbb (#0 - it has four heme residues, in chains A-D). The protein parts are totally different but I just used this as an example because they both have heme. It takes a little time, but I recommend learning about the command- line specification language because it is used in so many commands, and can be very powerful yet flexible. http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/ frameatom_spec.html Or, for some quick hints see the examples on the second page of the "Quick Reference": http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/quickref.pdf Elaine ----- Elaine C. Meng, Ph.D. meng(a)cgl.ucsf.edu UCSF Computer Graphics Lab and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco http://www.cgl.ucsf.edu/home/meng/index.html

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