- Chimera-users - RBVI Mailing Lists

Fwd: presets, python and printing
by Yang, Zheng (YZ) 10 May '10

10 May '10

Begin forwarded message: > From: "Yang, Zheng (YZ)" <yz(a)cgl.ucsf.edu> > Date: May 10, 2010 12:55:03 AM PDT > To: Daniel Gurnon <danielgurnon(a)depauw.edu> > Subject: Re: [Chimera-users] presets, python and printing > > Dear Dan, > > I am using Chimera output STL files, then print out with a uPrintPlus 3D printer. It's pretty handy using the "Export Scene" function to convert models into STL files. Although each single part cannot have mixed color, the printer is capable of printing 8 color APS by changing the cartridge. I have tried various protein representations: surface, ribbons showing the secondary structures, etc. All of them work prefect. > > By going over the Getting Started tutorial (http://www.cgl.ucsf.edu/Outreach/Tutorials/GettingStarted.html) users can easily get familiar with Chimera. Your students can use either GUI or command line mode. Alternatively, you can prepare them a Chimera commands file (plain text scripts file), containing your preset, bond thickness. (http://www.cgl.ucsf.edu/chimera/current/docs/UsersGuide/indexcommand.html#c…) They just need to open and load it. > > Chimera has the Undo Move function, allowing backtracking through the most recent model positions. (http://www.cgl.ucsf.edu/chimera/docs/ContributedSoftware/undomove/undomove.…) Section saving may solve part of the "Undo" problem. > > Looking forward to collaborating with you on the 3D model printing. > > Best, > YZ > > > > > > > > On May 9, 2010, at 7:51 AM, Daniel Gurnon wrote: > >> Hello everyone, >> My colleague and I are planning to incorporate 3D physical models into the introductory biochemistry course at our university, and I want students to use Chimera in the design of models. I've seen the technotes on 3D models made by the uPrint printer (http://www.cgl.ucsf.edu/Outreach/technotes/uprint.html) We'll hopefully be collaborating with the folks at MSOE on this, using their Z-corporation printer. They use RasMol to design models, but the file read by the printer is in .stl format. >> >> Here are my questions: >> 1) Has anyone used Chimera to create models to be printed on a Z-corp printer? (if yes, I'll have many more questions for you...) >> >> 2) Is it possible to define a user preset in Chimera with Python? I know this isn't currently possible with chimera commands, and I am *just* getting into Python now. Because students have difficulty jumping in to a project like this if they first have to learn to enter commands at a prompt, I want to make some presets that apply settings compatible with a 3D model; bond thickness, colors, etc. >> >> 3)If one knew Python, would it be possible to design a simplified user interface for Chimera? Even as simple as a pop-up window that contained the key features I want students to have access to right away? >> >> 4) Probably the biggest drawback to using Chimera with undergrads is the lack of an "Undo" button. I'm guessing this is extremely difficult to implement because of all 3rd party extensions incorporated into Chimera? What about an option to autosave every five or ten minutes? >> >> Thanks >> Dan >> >> -- >> ____________________________ >> >> Daniel Gurnon, Ph. D. >> Assistant Professor of Chemistry >> DePauw University >> Greencastle, IN 46135 >> >> p: 765-658-6279 >> e: danielgurnon(a)depauw.edu >> _______________________________________________ >> Chimera-users mailing list >> Chimera-users(a)cgl.ucsf.edu >> http://www.cgl.ucsf.edu/mailman/listinfo/chimera-users >

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superimposed 3D structure
by deeba noreen 08 May '10

08 May '10

I am trying to make superimpose two similar proteins. To evalute its structural differences regarding functional aspects, I want to derive a superimposed model. I am using Chimera format... Can you please tell me in terms of commands so i can apply.

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ligand comformation clustering
by Maurice Ho 06 May '10

06 May '10

Hi there, How to cluster the different conformations of a ligand after a docking experiment according to their relative orientations in the binding pocket? Any software can help to do so? I've tried the Ensemble Cluster function in Chimera but it seems clustering the different conformations according to the relative positions of the atoms of the ligand itself. I know that the command rmsd #0.1:UNK #0.2:UNK (UNK is the ligand) could be a way to illustrate how distant in average between different conformations. How could I make use of this command in script so that I could have all the possible comparisons and cluster them in a sensible way? Best regards, Maurice Ho

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Re: [Chimera-users] Sequential stereo
by Greg Couch 05 May '10

05 May '10

(Forgot to cc the list.) Chimera already works with NVidia's 3D Vision, in Windows XP/Vista/7 and Linux, as long as you have a 3D Vision supported Quadro FX card, see <http://www.nvidia.com/object/quadro_pro_graphics_boards.html> for details. Since chimera does stereo within a window, the GeForce cards are not supported. FYI, the latest NVidia drivers, version 197.59, have a bug that affects chimera stereo, so you'll need to use an earlier version of the driver (or presumably a latter version which has the bug fixed). When working with chimera in stereo, you really want a display that shows full resolution left and right eye images, and that generally means that the display refreshes at 120 Hz for 60Hz per-eye (100Hz would work too). If they don't support 120Hz, then the left and right eye images are interlaced when transmitted to the display and adjacent pixels can end up being shown in opposite eyes. And that makes 2D text, like the text in labels or dialogs, very fuzzy until you take the glasses off, but that makes the 3D fuzzy. That is annoying, but if the display is cheap enough, you might be able to live with it :-). For large groups of people, the cost of the active glasses becomes significant (and maintaining the batteries is a chore). So for a large display, I'd recommend considering a technology with passive glasses, like the RealD LP, <http://www.reald.com/Content/proProducts.aspx?pageID=122>, and the DepthQ Polarization Modulator, <http://www.depthq.com/modulator.html>. They are setups for a projector that polarizes the light onto a silver screen (that reflects polarized light coherently) and you use cheap polarized glasses to view the content (same glasses as a movie theater with RealD 3D). And if you use this technology, then you have the option of using a NVidia Quadro FX graphics card or an ATI FirePro graphics card (only the V8700, V8800, and V8750 have stereo DIN connectors). Hope this helps, Greg On 05/05/2010 08:47 AM, Daniel Hitchcock wrote: > Howdy, > > My advisor was interested in setting up a large display (52" screen) > with a computer controlling it for viewing and presentation of > structures in chimera. I have been commissioned to purchase the > hardware, and naturally I want to take it a step further. > > With new "3D Ready" LG and Samsung displays (as opposed to regular > >120Hz displays) they supposedly have an extra chip to properly sync > with an incoming 3D signal from a device, be it a bluray player or > whatever. Nvidia has begun to work on their system and promises a > software update to their 3Dvision line which would allow for the > native signal to be sent to the screen as opposed to just sending a > sequential 2D signal. My questions (if that all made sense), > > 1. Is there or will there be support for nvidia's 3d Vision line? We > will be running windows 7 and the program itself will be run in > windowed mode probably, not always full screen. > > 2. If that does not work, what would be the best recommendation for > some sort of stereoview (prefereably sequential) on a large LCD or > plasma display? > > > Thanks for the help! > -Daniel Hitchcock

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Sequential stereo
by Daniel Hitchcock 05 May '10

05 May '10

Howdy, My advisor was interested in setting up a large display (52" screen) with a computer controlling it for viewing and presentation of structures in chimera. I have been commissioned to purchase the hardware, and naturally I want to take it a step further. With new "3D Ready" LG and Samsung displays (as opposed to regular >120Hz displays) they supposedly have an extra chip to properly sync with an incoming 3D signal from a device, be it a bluray player or whatever. Nvidia has begun to work on their system and promises a software update to their 3Dvision line which would allow for the native signal to be sent to the screen as opposed to just sending a sequential 2D signal. My questions (if that all made sense), 1. Is there or will there be support for nvidia's 3d Vision line? We will be running windows 7 and the program itself will be run in windowed mode probably, not always full screen. 2. If that does not work, what would be the best recommendation for some sort of stereoview (prefereably sequential) on a large LCD or plasma display? Thanks for the help! -Daniel Hitchcock

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Adjust torsion and bump checking
by Kim, Sunghoon 04 May '10

04 May '10

Hi all, I would like to do the bump checking for the various rotameric states of a specific side chain generated by the rotation about dihedral angles. Bumps were detected by chimera command 'rotation' and 'findclash' and at first the script seemed working OK, but I'm not sure if the chi angles were correctly defined. When we look at the 'clashes/contacts' panel in Chimera, there are atom options for "Near" and "Far" positions in the rotating bonds. How can I specifying the 'Near' and 'Far' atoms in my 'rotation' command line in my python script to define my chi angles ? Thanks in advance for any info that you can provide. Thanks, Sunghoon Kim

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place fragment (again)
by Elisabeth Ortega 04 May '10

04 May '10

Dear all, We are trying to place a fragment in an exact position. We created a fragment with tetrahedral symmetry and we are trying to link an atom of other molecule at 2.00 A of the central atom of the new fragment and making a certain angle (120 degrees for example) with one of the substituents to get the correct orientation of the new fragment. Has anybody an idea that how can we do that? Thanks.

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about centroid
by Francesco Pietra 03 May '10

03 May '10

On running movie with centroid - as I was instructed by Eric; sorry I lost the email - I noticed that on long runs a shift is introduced between the protein and the centroid thread. To restore the relative positions between protein and centroid thread, I had to bring back (through the movie) the centroid to its initial position. francesco pietra

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rmsd between two ligands
by Miriam Gochin 01 May '10

01 May '10

Is there a way in chimera to obtain an RMSD between two structures without matching them, ie. just to know the difference between them? Miriam Gochin Touro University - CA miriam.gochin(a)tu.edu 707-638-5463

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Volume Subtractions
by Murali Ayaluru 30 Apr '10

30 Apr '10

Dear Chimera users/developers, I have two EM density maps (in mrc format) of a complex with different conformations. I want to subtract one density from another. I am wondering if it is possible in Chimera to subtract the densities? Cheers, Murali

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(no subject)
by Hanzhong Liu 28 Apr '10

28 Apr '10

Dear Chimera Developer: I tried to use Chimera to display MD movie. I tried both CHARMM trajectory and single pdb. They all works. When I put "ksdssp" in the per-frame script, it gave me a warning "name ksdssp is not defined". I used the latest version and the OS is windows 7. But when I ran chimera under windows xp, there is no such problem. I'm wondering if there is a bug of chimera. Thanks!-

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DCD format error 1
by Lilian OLIVIERI 28 Apr '10

28 Apr '10

Hello, I'm having trouble using MD/Ensemble analysis tool. When I try to check a MD trajectory generated by CHARMM (version C33b1), I get a "DCD format error 1" message. Here is the Reply Log: MDTools 1.2 Exp (2005-08-20) by James Phillips. Trajectory.DCD.MDToolsMarch97.md.help() for more info. - HomoCoord 1.3 Exp (2005-08-20) - Constants 1.1 Exp (2004-05-17) - AtomGroup 1.4 Exp (2007-02-07) - local 1.1 Exp (2004-05-17) Unknown OSTYPE ??? set. Viewing and plotting are disabled. - Trans 1.2 Exp (2005-08-20) - DCD 1.10 Exp (2007-02-07) - Data 1.2 Exp (2005-08-20) * THIS FILE IS LANGEVINEEF1.INP. * USAGE, CHARMM <LANGEVINEEF1.INP >LANGEVINEEF1.OUT. * RUNS LANGEVIN DYNAMICS WITH EEF1 IMPLICIT WATER. * DATE: 3/22/10 10:32:48 CREATED BY USER: lolivier /labos/lbgm/lolivier/chimera/share/Trajectory/DCD/MDToolsMarch97/md_DCD.py:121: DeprecationWarning: raising a string exception is deprecated raise "DCD format error 1" Traceback (most recent call last): File "CHIMERA/lib/python2.5/site-packages/Pmw/Pmw_1_3/lib/PmwBase.py", line 1747, in __call__ File "CHIMERA/share/chimera/baseDialog.py", line 328, in command File "CHIMERA/share/chimera/baseDialog.py", line 543, in OK File "CHIMERA/share/Trajectory/EnsembleLoader.py", line 92, in Apply File "CHIMERA/share/Trajectory/DCD/__init__.py", line 61, in loadEnsemble File "CHIMERA/share/Trajectory/DCD/__init__.py", line 71, in loadEnsemble File "CHIMERA/share/Trajectory/DCD/DCD.py", line 35, in __init__ File "CHIMERA/share/Trajectory/DCD/MDToolsMarch97/md_DCD.py", line 121, in __init__ DCD format error 1 DCD format error 1 File "CHIMERA/share/Trajectory/DCD/MDToolsMarch97/md_DCD.py", line 121, in __init__ See reply log for Python traceback. Is there a quick way to fix this problem? Thanks for any reply. -- Lilian Olivieri PhD student INSERM UMR-S 665, DSIMB/LBGM, Faculte des Sciences et Technologies Universite de La Reunion 15 Avenue René Cassin, BP 7151 97715 Saint Denis Messag Cedex 09 La Réunion, France Tel: +33 262 938 227 (office) Fax: +33 262 938 237 http://lbgm.univ-reunion.fr/ http://www.dsimb.inserm.fr/ **************************************************************************** It has long been an axiom of mine that the little things are infinitely the most important. -- Sir Arthur Conan Doyle, "A Case of Identity" ****************************************************************************

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volume threshold
by Alex Perálvarez Marín 27 Apr '10

27 Apr '10

Hi, there is any command to change the threshold of a density map? I have 100 maps open at the same time, and I want to change the threshold of all of them at the same time. Thanks in advance, best Alex.

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something flakey with measure buriedArea?
by Scott Classen 27 Apr '10

27 Apr '10

I'm seeing some very odd results coming from the measure buriedArea command if I use different values for probeRaduis and then grep for WARNINGs I get the following results: probeRadius # of WARNINGs 1.50 = 12 1.40 = 4 1.39 = 14 1.35 = 59 1.30 = 3 1.20 = 0 Here are some examples of the types of warnings I'm seeing: WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: class_arete2: warning hole in a reentrant face 1735 WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: class_arete2: warning hole in a reentrant face 2557 WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: class_arete2: warning hole in a reentrant face 1836 WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: check_SES_edge: weird case, 1 probe full2 and not full1 WARNING: class_arete2: warning hole in a reentrant face 2090 WARNING: class_arete2: warning hole in a reentrant face 1925 WARNING: compute_SES_area: ERROR: Solide angle (-1.972093) for contact face 3142 too large or too small Should I be concerned? Another unusual thing is that for certain calculations I get some crazy answers. For example the following command measure buriedArea '#0:.A,.B & #0:10.Dz<8' #0:10.D probeRadius 1.4 vertexDensity 2 outputs: B1SES = -583.491, B2SES = 51.4762, BaveSES = -266.007 but the same command with the probeRadius changed to 1.37 measure buriedArea '#0:.A,.B & #0:10.Dz<8' #0:10.D probeRadius 1.37 vertexDensity 2 outputs: B1SES = 53.9334, B2SES = 51.7969, BaveSES = 52.8652 Why would B1SES be so radically different for these two measurements? Thanks, Scott ps When doing these calculations Chimera randomly crashes with the following mscalc crash report: Process: mscalc [25532] Path: /Applications/Chimera-1.5b.app/Contents/Resources/bin/mscalc Identifier: mscalc Version: ??? (???) Code Type: X86-64 (Native) Parent Process: python2.6 [25482] Date/Time: 2010-04-27 17:23:08.864 -0700 OS Version: Mac OS X 10.6.3 (10D573) Report Version: 6 Interval Since Last Report: 402 sec Crashes Since Last Report: 1 Per-App Crashes Since Last Report: 1 Anonymous UUID: D0B1026B-AD5E-454C-8E35-49CCF7598339 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Crashed Thread: 0 Dispatch queue: com.apple.main-thread Application Specific Information: abort() called Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 libSystem.B.dylib 0x00007fff83cc7886 __kill + 10 1 libSystem.B.dylib 0x00007fff83d67eae abort + 83 2 libSystem.B.dylib 0x00007fff83c7fa75 free + 128 3 mscalc 0x00000001000218e5 MS_delete_SES_face + 920 4 mscalc 0x00000001000361f4 MS_update_ses + 919 5 mscalc 0x0000000100034f68 MS_restart_from_ses + 613 6 mscalc 0x0000000100036963 MS_update_ses + 2822 7 mscalc 0x0000000100037d94 MS_restart_from_triangulation + 591 8 mscalc 0x0000000100046c66 MS_triangulate_SES_component + 925 9 mscalc 0x00000001000066f6 MS_compute_surface + 443 10 mscalc 0x0000000100000ea2 main + 382 11 mscalc 0x0000000100000d1c start + 52 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0000000000000000 rbx: 0x0000000000000001 rcx: 0x00007fff5fbfd998 rdx: 0x0000000000000000 rdi: 0x00000000000063bc rsi: 0x0000000000000006 rbp: 0x00007fff5fbfd9b0 rsp: 0x00007fff5fbfd998 r8: 0x0000000000000e03 r9: 0x0000000000000000 r10: 0x00007fff83cc38ca r11: 0x0000000000000206 r12: 0x00000001001e4000 r13: 0x0000000100200000 r14: 0x0000000000000000 r15: 0x00000001004f7c70 rip: 0x00007fff83cc7886 rfl: 0x0000000000000206 cr2: 0x000000010022a000 Binary Images: 0x100000000 - 0x10004eff7 +mscalc ??? (???) <AF86E566-5546-A8C8-DE97-4A16408CB1BC> /Applications/Chimera-1.5b.app/Contents/Resources/bin/mscalc 0x7fff5fc00000 - 0x7fff5fc3bdef dyld 132.1 (???) <B633F790-4DDB-53CD-7ACF-2A3682BCEA9F> /usr/lib/dyld 0x7fff83c78000 - 0x7fff83e37ff7 libSystem.B.dylib 125.0.1 (compatibility 1.0.0) <CB9A4929-61AF-DE71-5635-133E9EC95783> /usr/lib/libSystem.B.dylib 0x7fff885a7000 - 0x7fff885abff7 libmathCommon.A.dylib 315.0.0 (compatibility 1.0.0) <95718673-FEEE-B6ED-B127-BCDBDB60D4E5> /usr/lib/system/libmathCommon.A.dylib 0x7fffffe00000 - 0x7fffffe01fff libSystem.B.dylib ??? (???) <CB9A4929-61AF-DE71-5635-133E9EC95783> /usr/lib/libSystem.B.dylib Model: MacPro1,1, BootROM MP11.005C.B08, 4 processors, Dual-Core Intel Xeon, 2.66 GHz, 14 GB, SMC 1.7f10 Graphics: ATI Radeon X1900 XT, ATY,RadeonX1900, PCIe, 512 MB Memory Module: global_name AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x87), Broadcom BCM43xx 1.0 (5.10.91.27) Bluetooth: Version 2.3.1f4, 2 service, 19 devices, 1 incoming serial ports Network Service: Built-in Ethernet 2, Ethernet, en1 PCI Card: ATY,RadeonX1900, Display, Slot-1 Serial ATA Device: ST3250824AS P, 232.89 GB Serial ATA Device: WDC WD2500JD-00HBC0, 232.89 GB Serial ATA Device: WDC WD1002FBYS-01A6B0, 931.51 GB Serial ATA Device: WDC WD1002FBYS-01A6B0, 931.51 GB Parallel ATA Device: SONY DVD RW DW-D150A USB Device: Hub, 0x05ac (Apple Inc.), 0x9131, 0xfd400000 USB Device: iPhone, 0x05ac (Apple Inc.), 0x1292, 0xfd430000 USB Device: Keyboard Hub, 0x05ac (Apple Inc.), 0x1005, 0xfd410000 USB Device: Apple Keyboard, 0x05ac (Apple Inc.), 0x021d, 0xfd412000 USB Device: Apple Cinema HD Display, 0x05ac (Apple Inc.), 0x9223, 0xfd420000 USB Device: Hub, 0x05ac (Apple Inc.), 0x9122, 0xfd300000 USB Device: Apple Cinema HD Display, 0x05ac (Apple Inc.), 0x921e, 0xfd320000 USB Device: USB Receiver, 0x046d (Logitech Inc.), 0xc525, 0x1d200000 USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8206, 0x5d200000 USB Device: Back-UPS CS 500 FW:806.q5.D USB FW:q5, 0x051d (American Power Conversion), 0x0002, 0x5d100000 FireWire Device: built-in_hub, Up to 800 Mb/sec FireWire Device: unknown_device, Unknown

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help with simple python script
by Scott Classen 27 Apr '10

27 Apr '10

Hi all, I have a number of PDB files that I would like to open, run a buriedArea calculation, save the results to a file, and exit I can put a bunch of commands in a file and launch it from a terminal shell chimera --nogui --nostatus --script calculate_buriedArea.com > results.txt the calculate_buriedArea.com file looks like this: open my.pdb measure buriedArea #0:.A #0:B This works, but is a bit cumbersome. I would like to make a python script so I can call my calculation with the name of the PDB file on the command line like this: chimera --nogui --nostatus --script calculate_buriedArea.py -- my.pdb .... so can someone please get me started here? import chimera myfile = chemera.somefunctiontoopenaPDBfile($1) Thanks, Scott

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ChemGroups
by Mauro Truglio 27 Apr '10

27 Apr '10

Hi, I got to understand the syntax to edit and even create "new" chemical groups for chimera to select (I successfully edited the file __init__.py in ChemGroups). Now I'm facing this problem with aromatic amines: when selecting, for example, primary aromatic amine, *I'd like to include also che C atom in the selection* - not only N,H,H. With other chemical groups this was easy, thanks to the [1,1,1,0,1]-like notation. But these aromatic amines are described in a different way, through the function findAroAmines in miscFind.py, and I'm finding it difficult to edit it. Can you help me? Thanks Mauro Truglio

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Daily Builds
by Jon N. Rumbley 27 Apr '10

27 Apr '10

Why is it that the Windows Daily Builds continue to say March 20, 2010 while the other operating system show the current date? Is the Windows version being built daily? Thank you, Jon Rumbley Dr. Jon N. Rumbley Assistant Professor Dept. of Pharmacy Practice and Pharmaceutical Sciences University of Minnesota-Duluth 127 Life Sciences 1110 Kirby Dr. Duluth, MN 55812 Phone: 218-726-6047 email: jrumbley(a)d.umn.edu

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saving attribute to file
by Scott Classen 26 Apr '10

26 Apr '10

Hello, When I save attributes to a text file from the "Render/Select by Attribute" dialogue box the values are written to the file apparently in a random order. Is there a way to get the residues or atoms to be written in a sensible way? i.e. by residue/atom number. Thanks, Scott Classen

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POV-Ray setting for movie making
by Paul Brandt 26 Apr '10

26 Apr '10

Hello, I am using chimera alpha version 1.3 (build 2577) running in linux (sled11) to make a movie using POV-Ray. The quality of the first few frames is stunning but thereafter becomes fuzzy around the edges of the molecule. Is there a way to fix this so that the entire movie is as clear and nice as the first few frames? Is there something wrong with my settings? Is what I'm seeing an artifact of mpeg compression? I am using the following POV-Ray settings to make an Mpeg1 movie Quality 11 Antialias: true Antialias method: recursive Antialias depth: 3 Antialias threshold: 0.3 Jitter: True Jitter amount: 1.0 Transparent background: false Wait for POV-Ray to finish false Keep input files: false Thanks for the help!! Paul

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please stop these emails
by Dr. Ahmed Sofy 26 Apr '10

26 Apr '10

Dear chimera organizing Thanks alot for your efforts but i want stop these emails of users Thanks alot again for your efforts

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HELP: I'm wondering about how to access the surface data
by "郑捷凯" 26 Apr '10

26 Apr '10

Hi chimera users, I'm wondering about several question: I installed chimera in my home dir, what's path to import in python? how can I access the data generated by mscalc in python?

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placeFragment
by Elisabeth Ortega 26 Apr '10

26 Apr '10

Dear all, I'm trying to place a fragment in certain position. I did this (on Python IDLE): from BuildStructure import placeFragment placeFragment( fragment, resName, model = 'scratch', position=None) Where fragment = benzene and resName = RING6 but I am not sure about that . Could you give me an example of placeFragment code? Thanks in advance. Elisabeth Ortega , Ph.D Student @ Universitat Autónoma de Barcelona

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"cutoff" parameter in Find clashes/contacts option
by Anna Feldman-Salit 24 Apr '10

24 Apr '10

Dear All, I was unsuccessfully looking for the explanation to what exactly "cutoff" parameter means. I'm using the Find clashes/contacts option to identify the contacts and not clashes, by assigning the default values of -0.4A and 0.0 to "cutoff" and "allowance" parameters. However, I do not understand how it is used. I would very much grateful for the information, since I also want to include it in my dissertation. Best regards, Anna Feldman-Salit

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transform coordinates
by Alex Perálvarez Marín 23 Apr '10

23 Apr '10

Dear all, I would like to change the coordinates (Euler angles) for an EM density map (Tools --> Movements --> Transform molecule coordinates). But in the molecule scroll menu, my map does not appear. Is possible to define the system coordiantes for a EM density map? Thanks in advance, Alex.

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Displacement through vectors
by Elisabeth Ortega 23 Apr '10

23 Apr '10

Dear all, I'm trying to move an atom though a vector but I don't find the correct Python script to do that. The vector starts in the mass center of the molecule and finish in a nitrogen atom. I want to place Helium at 2 angstrom of the nitrogen atom following the mentioned vector. Could you help me with the script? Thanks in advance. Elisabeth Ortega, Ph.D Student @ Universitat Autónoma de Barcelona

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