- Chimera-users - RBVI Mailing Lists

failure to add-H to quaternary C
by Francesco Pietra 05 Jun '17

05 Jun '17

pdbqt from autodock-vina -> pdb with chimera -> addH with chimera. Chimera fails (systematically) to add one H to a quaternary carbon of the diterpenoid. avogadro (which does not understand pdbqt) does the addH job correctly from chimera-savedpdb. Should Eric be interested, I could send (privately) the file best regards francesco pietra

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surfaces
by P. Buscemi 01 Jun '17

01 Jun '17

Elaine, A conceptual question. I'm trying to work with surfaces - large flat surfaces that proteins and polymers might adsorb. Think fibrinogen on medical devices. Chimera does not seem to like large surfaces in box. IF a portion of the surface slips outside the box, it goes to the other ( abnormal side). Constraining a portion of the surface does not help. Constraining all of the surface has not been tried. I'd like to use a box to keep the solvent and protein local. Any suggestions on how to handle this, or point me to a URL ? Can I constrain only in two directions perhaps ? or use a box size 30,30, infinite ? Best Paul Buscemi, Ph.D.

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addaa
by ‪farial tavakoli‬ ‪ 31 May '17

31 May '17

hi I am new chimera user. I wanna add an amino acid before the lys 12 in N-ter of my protein sequence but i dont know how should i type its command. I read the tutorial but just found adding an amino acid in C-ter. is there anyone who ca help me? I would be grateful if anybody helps me in the new residue's conformation ? thanks alotF.T

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membership
by P. Buscemi 31 May '17

31 May '17

Dear Chimera, I had registered as a member, but when I send or even return emails, I get placed on "hold till approved" waiting list. Can this be corrected ? Regards, Paul Buscemi, Ph.D. UMN

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Re: [Chimera-users] Help in docking with Chimera
by Elaine Meng 30 May '17

30 May '17

Hi Zahir, It might just be display (like one bond not shown) without any affect on the calculations because of the format of the file output by Autodock Vina. Autodock Vina is not our program, so we cannot control the output format. However, impossible for us to tell if that is the issue unless you send us an example file or files. You could use menu: Help… Report a Bug and include brief explanation and your email address and attach the example file or session that shows the problem. Keep in mind it might not be a Chimera bug. Best, 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 May 25, 2017, at 1:13 PM, Md Zahir Uddin <m_uddin(a)u.pacific.edu> wrote: > > Hi, > We are seeing a new problem in the docking of our peptides. After docking of our peptides using Autodock Vina function in Chimera, we are seeing in the output that the peptides are broken (splitting into two parts) at the protein's binding site. Our peptides are 8 amino acid long (one is 5 amino acid cyclic peptide by disulfide bond) and we prepared the peptides using the Build Structure function in Chimera and then dockprep & minimize structure. > Can you please help me in this? We would really appreciate your help. > Thanks, > Zahir >

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it might be nice to have the code on github
by Francois BERENGER 30 May '17

30 May '17

Hello, Sometimes, I want to dig into the source code of chimera, to know the implementation details of something. For projects hosted on github, this is easy. Also, in my experience, github fosters contributions from users. That being said, I did not use chimera for 2/3 years. I am glad to see that it is even more powerful and easy to use than before. The tutorials are also excellent (like: Preparing Molecules for DOCKing) and the .bild format that chimera can read in is extremely programmer friendly (it is so easy to generate). My love for chimera (over pymol) is renewed. Regards, Francois.

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high resolution animation in chimera
by Gangwar, Shanti P. 26 May '17

26 May '17

Dear Chimera Developing team, I am trying to make an animation using chimera. But it looks like that the animation output is poor quality, seems less dpi. How to get a high resolution animation, say 300 dpi, suing chimera? Thank you very much, Shanti Pal ******************************************** Shanti Pal Gangwar, Ph.D Dept of Pharmacology and Toxicology University of Texas Medical Branch Galveston, Texas-77555 Mobile: +1-409-256-8400 Email: spgangwa(a)utmb.edu

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custom presets not appearing
by Healey, Joe 26 May '17

26 May '17

Hi Chimera Team, I've defined a custom preset (implemented in both python and 'chimera language'), and I've placed in a folder which I have directed the custom preset dialogue to. E.g, in /Users/joehealey/Documents/Warwick/PhD/Structural_Work/Scripts/Presets/ I have the following script (chimera implemented one): # Goodsell.cmd ############################################################# # # # Chimera syntax commands for use as a preset. Sets the # # depiction in the style of David Goodsell. # # (The PDB Molecule-of-the-Month style). # # # ############################################################# # Create lower resolution surface models: sym surfaces all resolution 2 # Hide dashed bonds that may appear though the surface setattr g display false # Apply silhouette edging and colouring set silhouetteWidth 3.5 set silhouetteColor black set silhouette # Set depth cueing depth and colour set dcColor black set dcStart 0.5 set dcEnd 1.5 # Set background transparency set bgTransparency # Set lighting mode for flat rendering lighting mode ambient # Hide ribbons ~ribbon # Set surface colour color red ,s # Make sure molecule is in focus focus However, as per the documentation ( http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/preferences.html#Presets ) the preset doesn't appear in the presets menu. I can execute the script as normal with exec, and it works and has the desired effect, but I'd like it to be in the preset menu if possible? I suspect I'm missing something? Thanks, Joe Healey M.Sc. B.Sc. (Hons) MSRB PhD Student MOAC CDT, Senate House University of Warwick Coventry CV47AL Mob: +44 (0) 7536 042620 | Email: J.R.J.Healey(a)warwick.ac.uk Jointly working in: Waterfield Lab<http://www2.warwick.ac.uk/fac/med/research/tsm/microinfect/staff/waterfield…> (WMS Microbiology and Infection Unit) and the Gibson Lab<http://www2.warwick.ac.uk/fac/sci/chemistry/research/gibson/gibsongroup/> (Warwick Chemistry) Twitter: @JRJHealey<https://twitter.com/JRJHealey> | Website: MOAC Page<http://www2.warwick.ac.uk/fac/sci/moac/people/students/2013/joseph_healey> | ORCID: orcid.org/0000-0002-9569-6738

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Non-canonical H-bonds
by Markus Heller 25 May '17

25 May '17

Hi, Are there any plans to extend the H-bond detection functionality to include non-canonical H-bonds, e.g. C―H...A (A = N, O, S), D―H...π (D = N, O) and C―H...π varieties? Thanks Markus

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Surface function question
by Frances Shepherd 25 May '17

25 May '17

Hi, I am modeling a rotavirus VP7 protein using Chimera (PDB 3fmg), and I’m having trouble with the surface function. This protein is modeled with a monoclonal antibody conjugated to it, which I am able to hide. But when I show the surface for just the VP7 protein, there are gaps in the surface. The gaps appear to be in the areas where the VP7 protein comes into contact with the antibody. Is there a way to fill in these gaps? I’ve seen other publications that have used this protein (same PDB number), but the surface is complete. If you have any suggestions, I’d appreciate it. Thanks! -Frances

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Input from Avogadro, solvation.
by Paul Buscemi 23 May '17

23 May '17

Dear Chimera, Three basic questions: I’m using Avogadro to construct my models and import as mol2 or pdb types. I often obtain messages as or that the atom is not “listed” . Is there a preparation I can use for transfer of models ? Alternatively do you suggest any other program to construct models ? 2) If I use Tools to solvate a model, should I use the “Start solvate tool” under MD and/or check “Periodic Boundary Conditions. 3) Im considering building a multicore system ( two 16 core Xeon’s) as a 64 bit system would Chimera take advantage of the multi-core system ? Would the upgrade funds be better spent on memory ? Regards, Paul Buscemi, UMN BICB

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ImportError: libGL.so.1: cannot open shared object file: No such file or directory - Error shown when trying to run xdg-setup or chimera (Linus Ubuntu)
by Hannah Goldberg 23 May '17

23 May '17

Hello, I have installed the 32 bit version of Chimera-1.11.2, and I am having difficulty getting the icon on the desktop and launching. I get the following error: ImportError: libGL.so.1: cannot open shared object file: No such file or directory I have tried installing the libgl1-mesa-glx package and have even tried Idconfig. I can't find any errors similar to this anywhere. Please help! I can give more info if needed - I will be at my desk all day trying to install this Icon! -Cheers, Hannah -- *Hannah Goldberg* Case Western Reserve University Class of 2019 Physics B.S. Geological Sciences B.S. Undergraduate Research Assistant- Theoretical Biophysics

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FW: chimera download
by Williams, Joanne 23 May '17

23 May '17

Here is another inquiry for user help. From: bushra TAJ <bushraistaj(a)gmail.com<mailto:bushraistaj@gmail.com>> Date: Thursday, May 18, 2017 at 10:53 PM To: Joanne Williams <Joanne.Williams(a)ucsf.edu<mailto:Joanne.Williams@ucsf.edu>> Subject: Re: chimera download Hello Sir will you please guide me for one more thing, I got pdb of my protein and have Autodock installed in my PC. I have 6 derivatives that I synthesized myself, can I load chemdraw.cdx file in chimera to prepare it for docking and finally safe it in Mol2 format??? What format I can take of my ligand to load in Chimera?? On Fri, May 19, 2017 at 9:50 AM, bushra TAJ <bushraistaj(a)gmail.com<mailto:bushraistaj@gmail.com>> wrote: My full name is Maria Taj Muhammad and I am doing PhD at Karachi University Chemistry department in Karachi city of PAKISTAN. is that OK Regards On Thu, May 18, 2017 at 7:41 PM, Williams, Joanne <Joanne.Williams(a)ucsf.edu<mailto:Joanne.Williams@ucsf.edu>> wrote: Hello, Apologies, I was waiting to hear back from you. Please send me the following information: 1. Full Name: 2. School Name or company name that you are affiliated with: Thank you, JoAnne From: bushra TAJ <bushraistaj(a)gmail.com<mailto:bushraistaj@gmail.com>> Date: Wednesday, May 17, 2017 at 10:35 PM To: "Williams, Joanne" <Joanne.Williams(a)ucsf.edu<mailto:Joanne.Williams@ucsf.edu>> Subject: Re: FW: chimera download Hello Sir I know I am disturbing you, but I asked for Chimera free trial (if possible). waiting for your kind response On Thu, May 11, 2017 at 8:12 PM, Williams, Joanne <Joanne.Williams(a)ucsf.edu<mailto:Joanne.Williams@ucsf.edu>> wrote: Ok, let me know which school you are affiliated with and I will see about getting you access. Thank you, JoAnne From: bushra TAJ <bushraistaj(a)gmail.com<mailto:bushraistaj@gmail.com>> Date: Thursday, May 11, 2017 at 2:28 AM To: "Williams, Joanne" <Joanne.Williams(a)ucsf.edu<mailto:Joanne.Williams@ucsf.edu>> Subject: Re: chimera download I am associated with a school and need for my project (that small work that I am left with. Any chance? On Wed, May 10, 2017 at 8:23 PM, Williams, Joanne <Joanne.Williams(a)ucsf.edu<mailto:Joanne.Williams@ucsf.edu>> wrote: Hello, Thank you for your inquiry. I am sorry, we do not offer a free trial period. Are you affiliated with a school or company? Thank you, JoAnne From: bushra TAJ <bushraistaj(a)gmail.com<mailto:bushraistaj@gmail.com>> Date: Monday, May 8, 2017 at 1:22 AM To: "chimera(a)cgl.ucsf.edu<mailto:chimera@cgl.ucsf.edu>" <chimera(a)cgl.ucsf.edu<mailto:chimera@cgl.ucsf.edu>> Subject: chimera download Hello Sir Can I download chimera as free trial on my laptop. windows 7, 500GB, 32bits???

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Re: [Chimera-users] question about report of hydrogen bonds that Chimera produces
by Elaine Meng 22 May '17

22 May '17

> On May 22, 2017, at 2:43 PM, Roberto Garza-Lopez <RAGL4747(a)pomona.edu> wrote: > > Hi Elaine, I saw your name in the chimera group in a conversation on line and I was wondering if I can ask you a very simple question. > > I used FindHBond under Structure Analysis to generate the document with all the hydrogen bonds for protein PDB# 1aac (amicyanin). See attached. > > I noticed that for some H bond distances the report includes both A---B and B---A like in the cases below which of course have the same distance. > > <image001.png> > <image002.png> > > <image003.png> > <image004.png> > > However for other cases like the one below, I do not find the reverse, meaning LEU 80.A O à VAL 43.A N. WHY IS THAT? > > VAL 43.A N LEU 80.A O no hydrogen 2.815 N/A > > Thanks, > Roberto Hi Roberto (CC-ing chimera-users(a)cgl.ucsf.edu , recommended address for Chimera questions) It is because the lines list H-bond donor before H-bond acceptor. Some groups can be both donor and acceptor, but some groups (like carbonyl O) can only be acceptors, and some can only be donors. The results include a title row which explains what the columns mean. For example, opening 1aac and running findhbond gives: #0, chain A: amicyanin 1aac opened Finding intermodel H-bonds Finding intramodel H-bonds Constraints relaxed by 0.4 angstroms and 20 degrees Models used: #0 1aac H-bonds (donor, acceptor, hydrogen, D..A dist, D-H..A dist): ASP 1.A N HOH 297.A O.1 no hydrogen 3.132 N/A ASP 1.A N HOH 297.A O.2 no hydrogen 3.093 N/A ASP 1.A N HOH 297.A O.3 no hydrogen 3.360 N/A LYS 2.A N LEU 62.A O no hydrogen 2.776 N/A [… etc. …] 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

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Some questions about the software
by Lizar wang 22 May '17

22 May '17

Good morning, When I open Chimera11.1.2, it shows that" Chimera existed abnormally; the exit code is 1. Use the -- debug command line option for the full error message." What should I do? I cannot see the interface, just this error window.Thank you. User 发自我的 iPhone

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FW: UCSF CHIMERA
by Williams, Joanne 22 May '17

22 May '17

Hello, I am not sure if you already responded to this email below or if I forwarded it even. Just in case, please read below. Thank you, JoAnne From: Manjunath gl <glmanjunath.iitm(a)gmail.com<mailto:glmanjunath.iitm@gmail.com>> Date: Monday, May 15, 2017 at 11:02 PM To: "chimera(a)cgl.ucsf.edu<mailto:chimera@cgl.ucsf.edu>" <chimera(a)cgl.ucsf.edu<mailto:chimera@cgl.ucsf.edu>> Subject: UCSF CHIMERA Hi Please let me know can I use this software for geomaterial modeling? Thanks Dr. Manjunath

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Using vop to cover a whole molecule
by Pradeep Pallan 22 May '17

22 May '17

Hi All, I would like to know how to extend an e-density map in y or z direction. Here is my case: The DNA structure that was refined in shelx. Model #0 is DNA and the e-density map is model #1. When I used vop cover #1 atom #0, the electron density covers the molecule along two axes, and for the third axis it covers partly. How to extend the e-density map in a particular axis? Thank you! -- ------------------------------------------------------------------- Pradeep Pallan

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Open a file with Windows 10 Command Prompt
by Mark F Rosenberg 20 May '17

20 May '17

For Mac in Terminal I can type Chimera and the file name to open a volume etc which is very useful. In Windows 10 for Command Prompt Terminal I cannot seem to achieve this. I thought if I added "open" after the executable I could achieve this but it does not appear to work. Please can you advise? Many thanks. Mark

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Re: [Chimera-users] Help in docking with Chimera
by m_uddin 19 May '17

19 May '17

Hi Dr. Elaine, Got it. It worked. Thanks a lot. Zahir -------- Original message --------From: Elaine Meng <meng(a)cgl.ucsf.edu> Date: 5/19/17 1:01 PM (GMT-08:00) To: Md Zahir Uddin <m_uddin(a)u.pacific.edu> Cc: chimera-users(a)cgl.ucsf.edu Subject: Re: [Chimera-users] Help in docking with Chimera Hi Zahir, Based on the error message, all I can suggest is to make sure that the location for output files is somewhere you have permission to write and read files. I.e in the Autodock Vina dialog, there is an “Output file” box. Next to it is a button “Browse” which you should click and then navigate in the resulting dialog to set the location to some folder in which you are sure that you have permission to read and write files. <http://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/vina/vina.html> 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 May 19, 2017, at 11:46 AM, Md Zahir Uddin <m_uddin(a)u.pacific.edu> wrote: > > Hi, > My name is Zahir. I am a Ph.D. student of Pharmaceutics at University of the Pacific. Recently in our lab we were trying to do some docking of our peptide ligands on the human Aminopeptidase N (CD13) receptor using the Autodock vina option in the Chimera. But everytime we are getting an error message and the docking stops. I am attaching the error message here. We did dockprep of the receptor and ligands. And we tried to do the docking with both pdb and mol2 files. > > We would really appreciate your help in this regard. > Thanks, > Md Zahir Uddin

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Help in docking with Chimera
by Md Zahir Uddin 19 May '17

19 May '17

Hi, My name is Zahir. I am a Ph.D. student of Pharmaceutics at University of the Pacific. Recently in our lab we were trying to do some docking of our peptide ligands on the human Aminopeptidase N (CD13) receptor using the Autodock vina option in the Chimera. But everytime we are getting an error message and the docking stops. I am attaching the error message here. We did dockprep of the receptor and ligands. And we tried to do the docking with both pdb and mol2 files. We would really appreciate your help in this regard. Thanks, Md Zahir Uddin <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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saving rotated volume
by Reginald McNulty 18 May '17

18 May '17

Dear Users, I have two objects open in Chimera. One is a .bild file that shows axes x,y,z. The other is a volume of a virus with a tail. I used “activate only” to manipulate the volume relative to the axis.bild object. After rotating the virus to align the tail to the Z-axis, I try to save the map but it’s always back in the original position when I re-open it in Chimera. Is there a way to save this transformed map? -Reggie

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morphed conformation movie?
by esserlo＠helix.nih.gov 18 May '17

18 May '17

For this one, I found a solution: >Also is there a commandline version to access the conformations and to re-run >kdssp on each interpolated conformation? I read you need the perframe command >for that. Does anyone have a working example ? There is a good example (and several more) in http://www.cgl.ucsf.edu/chimera/animations/animations.html (for instance leucyl-tRNA.cmd ) However, I still don't know how to re-open a morphing menu that disappeared and the per-frame kdssp is not yet clear to me yet. Thanks, Lothar

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morphed conformation movie?
by esserlo＠helix.nih.gov 18 May '17

18 May '17

Hi, I used Tools->Structure Comparison->Morph Conformations and it worked well. However, I somehow lost the menu that opens up after the morph is complete. Well, I cannot find it. How can you re-open it to run through the morphed conformations again ? Also is there a commandline version to access the conformations and to re-run kdssp on each interpolated conformation? I read you need the perframe command for that. Does anyone have a working example ? Thanks, Lothar

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reading in electron density map H32 vs R32
by Christine Gee 17 May '17

17 May '17

Hi, I have a structure in the space group H32. I wrote out a map, which lists it as space group 155. I was wondering if chimera would read that in as space group H32 (R32:h) or as R32 (R32:r). Regards Christine

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Open file interface suggestion
by Dan Kool 15 May '17

15 May '17

Hello, I have been using your software for a while. I love the features and general user interface. There is one thing that drives me nuts, though. The side-by-side list interface when I go to open files.A window-based one would be much easier. Is there an option for that that I am not seeing? If not, I suggest adding the option. Thank you for your software! Best, Dan ---------------------------------------------------- Daniel Kool Graduate Research Assistant, Jernigan Lab Bioinformatics and Computational Biology Iowa State University *kool(a)iastate.edu <kool(a)iastate.edu>*

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error or bug
by Arthur Szabo 15 May '17

15 May '17

Continuing my earlier question. I tried the suggestions sent to me neither split nor surfcat seemed to work. After some attempts I received this window and reported the bug [cid:image001.png@01D2CD74.26A7D780] I then tried to use molmap and I did get a surface and saw how by moving the cursor in the molmap window I could get the surface to progressively disappear leaving the selected domains that were colored previously. The surface was for the entire protein, one of the models #0. I could also change the surface color. Then I went looking at some of the tabs on the molmap window and cannot describe the sequence, but ended up with another window that I eventually found out was for visualizing Cryo EM maps. Now I have a surface that is multicolored and looks like jelly beans. Somehow perhaps by selecting one of the models from the command lines, (#0) I was able to pull out a surface of the entire molecule, rotate it etc, and progressively remove the surface, til the selected domains remained. Stuck!!! This is one model: [cid:image003.png@01D2CD79.3D09E040] [cid:image004.jpg@01D2CD79.3D09E040] HERE IS ANOTHER which is #1 or #2 [cid:image005.jpg@01D2CD79.3D09E040] [cid:image006.png@01D2CD79.3D09E040] Arthur Szabo

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Visualizing specific atoms in autodock-vina output
by Francesco Pietra 15 May '17

15 May '17

I am trying to investigate the protein surrounding a docked (autodock-vina, alpha chimera 1.1 build 40505 linux 64) ligand. I am interested in the environment of specific atoms of the ligand. With command sel #1.1@N z<5 I can investigate the protein at 5A from BOTH nitrogen atoms of model 1.1. How to select one of the two existing N atoms in the ligand? Same questions for other ligand atoms (there are many O-atoms) Is that possible without elaborating the vina output? thanks francesco pietra

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Saving multiscale models only?
by Healey, Joe 12 May '17

12 May '17

Hi Chimera team, Is it possible to save a multiscale model without the atomic coordinates that generated it in the first place? I've seen that the multiscale models can be saved within Scenes, but I'd like to save it as a 'structure' such that I can continue to use it in subsequent sessions. At present, when I close the PDB model that generated the MultiScale map, the map also closes. Thanks, Joe Joe Healey M.Sc. B.Sc. (Hons) MSRB PhD Student MOAC CDT, Senate House University of Warwick Coventry CV47AL Mob: +44 (0) 7536 042620 | Email: J.R.J.Healey(a)warwick.ac.uk Jointly working in: Waterfield Lab<http://www2.warwick.ac.uk/fac/med/research/tsm/microinfect/staff/waterfield…> (WMS Microbiology and Infection Unit) and the Gibson Lab<http://www2.warwick.ac.uk/fac/sci/chemistry/research/gibson/gibsongroup/> (Warwick Chemistry) Twitter: @JRJHealey<https://twitter.com/JRJHealey> | Website: MOAC Page<http://www2.warwick.ac.uk/fac/sci/moac/people/students/2013/joseph_healey> | ORCID: orcid.org/0000-0002-9569-6738

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surface transparency animation
by esserlo＠helix.nih.gov 12 May '17

12 May '17

Hi, I am trying to animate a transition of a surface from 100% transparent to opaque. In a test (the real case is more complicated) I did this: open 1hen.pdb # Lysozyme test # Chimera shows a blue ribbon model on gray background surface #0 scolor #0 color green # chimera shows a green surface over a (now invisible) blue ribbon model # According to the manual the following (I think) should work: transparency 80,s #0 # I expected to see the green surface to become 80% transparent and the blue ribbon model to shine through. # No luck. What am I missing ? BTW the page https://www.cgl.ucsf.edu/chimera/current/docs/UsersGuide/midas/transparency… seems to be missing the last example concerning transparency of surface patches. Thanks, Lothar

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scripting & density
by Dougherty, Matthew T 12 May '17

12 May '17

Hi, I have a dataset, its values are 1-255. I would like to modify the density values using a script. Specifically, I would like to set density values 50-74 & 90-110 to the value of zero. Is there a way to do that using scripting, or do I need to do that using python? Matthew Dougherty National Center for Macromolecular Imaging Baylor College of Medicine ================================================= =================================================

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surfaces
by Arthur Szabo 12 May '17

12 May '17

Working with a structure that has many domains. I would like to show the surface of three of the domains. I have hidden the ribbon residues of all but the ribbons of three domains. I receive the following error message [cid:image001.png@01D2CB26.2CA19B30] The domains are not contiguous in the structure, but even if I try to show the surface of only one domain I get the same message. And going to the Selection inspector is not helpful since it is not obvious as to how that option assists the surface representation. Over to you Thanks Arthur G. Szabo

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vop scale and vop morph (maybe chimeraX?)
by Oliver Clarke 11 May '17

11 May '17

Hi, When I morph two maps, if they have different mean/sd, I always have to scale the mean and sd of the second map to that of the first, otherwise the morph looks very non-linear - nothing happens until fraction 0.9, and then the morphing happens increasingly fast (so not ideal for visualization). If I normalize one map to the other I get a beautiful, smooth, linear morph. Would it be possible in either chimera or chimeraX to automate this? Either to add an option to vop scale to scale one map directly to the parameters of another (rather than having to use vop measure mapstats) or to have an option for vop morph to put both maps on the same scale? Cheers Oli

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suggestion: if clip planes cross, swap them?
by Oliver Clarke 11 May '17

11 May '17

Hi, Quite often, in aliases and scripts where I am adjusting the clip planes, I get the error “far clip plane placed in front of near clip plane”, or words to that effect. I’ve tried various ways to remedy this but it has to be done on a case by case basis and sometimes I just can’t figure it out. Would there be any possibility for Chimera to rather than triggering an error in such a case, just swap the clip planes when this happens, so the near plane becomes the far plane, and vice-versa? Or is there some other foolproof way to avoid this? I get this error when I want to adjust the hither and yon planes successively - would it be possible to add a command that adjusts them both at the same time, like `section` but with simultaneous independent control over both clip planes? Cheers Oli

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morph map fails with solid representation
by Oliver Clarke 10 May '17

10 May '17

Hi, When I create (using the latest nightly build) a morph between two maps using the “Morph map” GUI, and then I change the representation of the resultant volume to solid, the morph no longer runs, or rather, it appears to run, but the solid volume does not update. This used to work - I used it to create quite a few movies - so I guess it is a bug? Cheers Oli

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symmetrical fit of maps
by Oleksiy Kovtun 10 May '17

10 May '17

Hi all, is there is a way to do symmetrical fit and add symmetrical copies for map to map fitting? The standard symmetrical fitting protocol (measure symmetry. #0...; sym #1 group #0 update true; fitmap...) only works for molecule to map fit. Thank you, Oleksiy Dr Oleksiy Kovtun Research Fellow Briggs group MRC Laboratory of Molecular Biology Francis Crick Avenue Cambridge CB2 0QH UK Tel: + 44 1223 267551 Email: okovtun(a)mrc-lmb.cam.ac.uk

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translation and rotation in MATLAB using transformation matrices from chimera
by Oleksiy Kovtun 10 May '17

10 May '17

Dear all, I need to merge two maps in MATLAB using alignment data from chimera. Inputs: two maps of the same box size, origin. I use matrixget - to report translation and rotation matrices for the aligned map . Translation operation works well when transferred into MATLAB (briefly, translation matrix gets converted in eulers and pased on to tom_rotate command in MATLAB, TOM package). However the x y z translation coordinates (the fourth column top to bottom in matrixget - output) are way off the real translation when using tom_shift command in MATLAB, TOM. I found out that if I open the rotated map and fit it again, it gives close to correct translation matrix. What's going wrong here? Does anyone have a solution how to overlay 3D arrays in MATLAB using chimera-reported transformation matrices? Many thanks, Oleksiy Dr Oleksiy Kovtun Research Fellow Briggs group MRC Laboratory of Molecular Biology Francis Crick Avenue Cambridge CB2 0QH UK Tel: + 44 1223 267551 Email: okovtun(a)mrc-lmb.cam.ac.uk Dr Oleksiy Kovtun Research Fellow Briggs group MRC Laboratory of Molecular Biology Francis Crick Avenue Cambridge CB2 0QH UK Tel: + 44 1223 267551 Email: okovtun(a)mrc-lmb.cam.ac.uk

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Multiple fitting of structures in to EM densities
by Healey, Joe 10 May '17

10 May '17

Dear chimera team, I have a large EM density I would like to fully populate with a number of copies of a protein. To be more specific, the EM density is of 2 concentric protein rings (EMDB-6720), and each concentric ring is stacked 3 or 4 times. Each ring is a hexamer, so I would like to populate every single ring with 6 copies of each protein (but the inner and outer rings are 2 different proteins). What would be the best mechanism to iteratively import a protein, populate an EM density space, then move on to the next one? Currently, I think if I was to simply open several copies of the protein, they would probably all try to fit within the same EM density position, leaving the rest of the structure empty? My apologies if this isn't totally clear, I've tried to explain it as best as I think I can. I'm happy to accept solutions in 'chimera language', python (or I also have Jaime's Pychimera installed). Many thanks Joe Healey M.Sc. B.Sc. (Hons) MSRB PhD Student MOAC CDT, Senate House University of Warwick Coventry CV47AL Mob: +44 (0) 7536 042620 | Email: J.R.J.Healey(a)warwick.ac.uk Jointly working in: Waterfield Lab<http://www2.warwick.ac.uk/fac/med/research/tsm/microinfect/staff/waterfield…> (WMS Microbiology and Infection Unit) and the Gibson Lab<http://www2.warwick.ac.uk/fac/sci/chemistry/research/gibson/gibsongroup/> (Warwick Chemistry) Twitter: @JRJHealey<https://twitter.com/JRJHealey> | Website: MOAC Page<http://www2.warwick.ac.uk/fac/sci/moac/people/students/2013/joseph_healey> | ORCID: orcid.org/0000-0002-9569-6738

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Re: [Chimera-users] Wire thickness
by Oliver Clarke 10 May '17

10 May '17

Hi Hernando, I used the ca_and_sidechains alias in this script (you should be able to get the individual commands from that). https://github.com/olibclarke/chimera-trimmings/blob/master/chimera_aliases… Cheers Oli > Dear Chimera > How do you set the thickness of the backbone and side chains independently to produce figures like the ones below (sorry I hijacked the picture used in blurred-display discussion). > > Thanks > > H.

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Wire thickness
by Hernando J Sosa 10 May '17

10 May '17

Dear Chimera How do you set the thickness of the backbone and side chains independently to produce figures like the ones below (sorry I hijacked the picture used in blurred-display discussion). Thanks H. [cid:image001.jpg@01D2C8F6.BEA06B60][cid:image002.jpg@01D2C8F6.BEA06B60]

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Re: [Chimera-users] Gaussian blur depth cueing? (ChimeraX)
by Tom Goddard 09 May '17

09 May '17

Before/after pair - at large size, I think the blur is helpful, but YMMV > On May 9, 2017, at 12:09 PM, Oliver Clarke <olibclarke(a)gmail.com <mailto:olibclarke@gmail.com>> wrote: > > Perhaps a better example: > > <brightness_blur.jpg> >> On May 8, 2017, at 10:07 PM, Tom Goddard <goddard(a)sonic.net <mailto:goddard@sonic.net>> wrote: >> >> Hi Oliver, >> >> The depth of field blur images I have seen of maps and molecules have all struck me as cool looking and less useful then conventional brightness based depth cuing. Brightness depth cue allows you to include more of the structure in back while reducing the obscuring effect it has on stuff in front. Blurring depth cue interferes much more with the stuff you want to be in focus. Your image minimizes the badness by not having any blurring in the central region of the image, but the periphery where there is blurring may be artistically nice, but I hope you are not looking at the structure there. >> >> That said the technique could be done using the depth buffer that assigns depth to each pixel — it can’t be done really well that way because that depth only gives the front-most object and if transparency is present the pixel shows multiple objects at different depths. I think it would require a compelling mock-up image to make it worth spending effort on this effect. It is relatively easy to make a mock-up image by using clip planes to save several images representing slabs at different depths, then blur each slab image differently depending on depth in a photo editor and composite. >> >> Tom >> >> >>> On May 5, 2017, at 6:42 AM, Oliver Clarke <olibclarke(a)gmail.com <mailto:olibclarke@gmail.com>> wrote: >>> >>> Hi, >>> >>> I was wondering if you have thought about implementing depth-dependent gaussian blur as a depth cueing mechanism in ChimeraX? >>> >>> The idea would be to blur the image in a manner dependent on the distance from the plane intersecting with the center of rotation, to mimick depth of field in a camera. >>> >>> Mocked up in the attached using a tilt/shift effect, but without access to real depth information - I wonder if it might better convey depth information than distance-dependent changes in brightness/contrast under some circumstances? >>> >>> Cheers >>> Oli >>> >>> <test_image_tilt_shift.png> >>> _______________________________________________ >>> Chimera-users mailing list: Chimera-users(a)cgl.ucsf.edu <mailto:Chimera-users@cgl.ucsf.edu> >>> Manage subscription: http://plato.cgl.ucsf.edu/mailman/listinfo/chimera-users <http://plato.cgl.ucsf.edu/mailman/listinfo/chimera-users> >> >

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Gaussian blur depth cueing? (ChimeraX)
by Oliver Clarke 09 May '17

09 May '17

Hi, I was wondering if you have thought about implementing depth-dependent gaussian blur as a depth cueing mechanism in ChimeraX? The idea would be to blur the image in a manner dependent on the distance from the plane intersecting with the center of rotation, to mimick depth of field in a camera. Mocked up in the attached using a tilt/shift effect, but without access to real depth information - I wonder if it might better convey depth information than distance-dependent changes in brightness/contrast under some circumstances? Cheers Oli

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Re: [Chimera-users] Query regarding chimera tool
by Elaine Meng 09 May '17

09 May '17

On May 8, 2017, at 10:54 PM, bushra TAJ <bushraistaj(a)gmail.com> wrote: > Hello Sir > I want to do some docking studies of my own synthesized compounds. I found them very active in some anti-cancer assays. > I will use AUTODOCK for this purpose. I have got the Pdb file of my target protein from PDB database. > My problem is how to make pdb of my molecule (input file for autodock) can I use chimera for that?? > I have chem-draw file format of my molecules will that open in chimera to make their pdb format. > Regards > In the menu under Tools….. Surface/Binding Analysis: There is a “Dock Prep” tool for preparing PDB files. There is also an “Autodock Vina” tool that will make prepared files in pdbqt format, but it will also run Autodock Vina docking (in other words, the prepared pdbqt files are a by-product but you could also use them as input to something else). You should look at the manual pages for more information. <http://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/dockprep/dockprep…> <http://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/vina/vina.html> Also in the future please send Chimera questions to chimera-users(a)cgl.ucsf.edu and include a useful subject line like “preparing molecules for docking.” Messages to my individual email address may not get answered. 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

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All-by-all distances
by Elaine Meng 09 May '17

09 May '17

> From: Elaine Meng <meng(a)cgl.ucsf.edu> > Subject: Re: Chimera Question > Date: May 8, 2017 at 6:03:55 PM PDT > > Hi Shawn, > I’m out sick… please send Chimera questions to chimera-users(a)cgl.ucsf.edu list. On second thought, I think I can answer quickly. However, for future reference please use the user list for Chimera questions and include a informative “subject” line to make it easier for others to find … thanks! Command: findclash :lys@n test self overlap -99999 log true … will put all the Lys N -> Lys N distances (within about 1000 A … just use a larger-magnitude negative overlap if you think there are longer distances) in the Log. It won’t be a table, though, just a list of distances that you would have to process yourself. Or instead of “log true” (or in addition to it) you could use the “saveFile” option to specify putting the same output into a text file. Command and options described here: <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/findclash.html <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/findclash.html>> Output is like the following example for PDB 2gbp, with distances in the last column: 464 contacts atom1 atom2 overlap distance LYS 191.A N LYS 189.A N -1.010 4.290 LYS 223.A N LYS 227.A N -1.505 4.785 LYS 246.A N LYS 300.A N -3.378 6.658 […etc…] However I suspect maybe you meant NZ (the end of the sidechain) instead of the backbone N, in which case the command would be something like findclash :lys@nz test self overlap -99999 log true … with output like: 465 contacts atom1 atom2 overlap distance LYS 270.A NZ LYS 276.A NZ -1.932 5.212 LYS 308.A NZ LYS 246.A NZ -2.262 5.542 […etc…] Best, 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 May 8, 2017, at 4:14 PM, Shawn Sternisha <ssternisha(a)chem.fsu.edu> wrote: >> >> Hello Dr. Meng, >> >> Sorry to bother you but I have a question about Chimera that I have not been able to find an answer to, despite intensive web searches. I have seen your name on a lot of useful posts and answers so I figured I would give emailing you a shot. I have been searching for a method to measure all possible distance between Lys residues in a protein in a high-throughput manner. >> >> For example, if my protein has 17 Lys residues, is it possible to generate a table that has distance measurements between the N atoms of all of them. I believe that would be 231 possible distances. Any advice you could provide would be greatly appreciated. Thank you for your time in advance. >> >> Best, >> Shawn Sternisha >> PhD Candidate, Miller Laboratory >> Dept. of Chemistry and Biochemistry >> Florida State University > >

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calculate FSC curve between experimental cryo EM map and model
by #AHMED TOFAYEL# 08 May '17

08 May '17

Dear all, If I want to calculate FSC curve between experimental cryo EM map and model, what is the correct procedure to do so? I will explain what I have tried so far. Although I have variable local resolution in my map, according to FSC=0.143 criterion I have a 4 Ang map (say 1.mrc), I have used 'molmap' command in Chimera to generate a simulated map at 4 Ang. Then I used "vop resample" to take care of the pixel and box values ( then saved as 2.mrc). Thereafter, I have used "e2proc3d.py 1.mrc fsc.txt --calcfsc=2.mrc and plotted the fsc.txt file to get the curve. I am not sure if I am on the right track. My pixel size is 1.28. Best regards, Tofayel

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MD file naming
by P. Buscemi Ph.D. 08 May '17

08 May '17

Please,,,, How does one specify the output file name and location for molecular dynamics output ? regards Paul Buscemi, Ph.D.

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Distance measurement file
by Marco Sette 08 May '17

08 May '17

Dear all, I have to measure the same interatomic distances in different molecules: it is possible to create a file like distance ... distance ... distance ... and use as input, just to avoid typing the same command many times? Thanks for your help, Marco

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hbonds and distances movie script questions
by mfellner＠msu.edu 05 May '17

05 May '17

Good day I am making a movie by writing a chimera command script and I searched through existing chimera topics but I could not find a solution for these issues: Is there a command to display hbonds, I have made a script now to select residues and find the hbonds, even color + line width them and then I get rid of them later by ~hbonds. What I would prefer is to have them premade (so I dont need to select residues during the movie) but not displayed, later I then displayed and undisplayed them with a scipt command. Also I could not get the lineType command to work inside the hbond script (lineWidth worked fine), I had to use the setattribute command in a second script line, so for a splitsecond I have a different linetype displayed. The second question is about distance labelling. I can set the options in the gui and then distances are displaed by a script with the distance in Angstrom shown. Is there a way to undisplay the distance label later but keep the dashed line, so change the gui option with a script? Also I assume this is not possible, is there a script to change where the label will show up next to the line? I have not looked into displaying and undisplaying 2D labels with scripts, maybe that is a possibility? Lastly which is not that important, is there any way to trim the corners easily? I think I am recording a lot of white space to the left and right throughout the movie, if I resize the window the molecule gets focused, so its no longer exactly where I had it related to the corners and I think I would have to adjust the script. Thank you so much, I hope I made my questions clear, chimera is an awesome program, movie is 21 minutes at the moment. Best wishes Matthias Fellner Michigan State University

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Sub-region selection
by Soumya Govinda Remesh 05 May '17

05 May '17

Hello, I am analyzing some tomography data. I am working with multiple maps - one which defines several cells and another that defines their inner organelles. I want to be able to select and save the map for individual cells and their corresponding map for the organelles. In addition to using the sub-region selection in Volume-viewer is there another way to select the cells? Thanks Best, Soumya Govinda Remesh, Ph.D. Postdoctoral Fellow at Advanced Light Source Lawrence Berkeley National Laboratory 1 Cyclotron Road MS 6R2100 Berkeley, CA 94720 (phone) 510-495-8179 (cell) 804-402-8730 sgremesh(a)lbl.gov

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Contact Maps (RRdistance Maps) questions:
by Nicole Persky 03 May '17

03 May '17

Hi All, I've just found the RRdistance Map function on Chimera and would like to compare between structures. I would like to: 1- make contact map of protein 1 to protein 1 with a cutoff of about 6 angstroms 2- make a contact map of protein 2 to protein 2 with a cutoff of about 6 angstroms 3- compare these two contact maps using the colors available for the whole contact map. I can only seem to compare the ENTIRE contact map of protein 1 to the ENTIRE map of protein 2, whereas I'd like to mask any contacts over 6 angstroms. Alternatively, if anyone knows of a way to export residue lists of contacts from the contact map site I could just compare them that way. ALSO: Anyone know of a way to map defined attributes onto a contact map? Thanks so much! Sincerely, Nicky

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Working with Electron density map
by MOHD HOMAIDUR RAHMAN 03 May '17

03 May '17

Dear Chimera user's I am trying to super impose molecular dynamics calculated density on cryo EM density and then slice densities to visualize each in different colors. I fitted density successfully now during slicing their X Y Z co-ordinate is not matching. The similar analysis were publish in Marzinek et al., 2016, Structure 24, 1–11 August 2, 2016 http://dx.doi.org/10.1016/j.str.2016.05.014 Please see figure 3 for more details and image attached here. Thank Regards Rahman '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' *M*d* H*omaidur* R**ahman *( Research Scholar ) Lab No. 510, Computational Biophysics Lab. Department of Biotechnology Indian Institute of Technology-Madras Chennai-600 036, India *Mobile No = +91- 7845991785 <078459%2091785>* '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

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