- Chimera-users - RBVI Mailing Lists

Fitmap: correlation about the mean for global search
by Michele Lunelli 25 Sep '18

25 Sep '18

Dear people, I want to do a global search of an atomic model into an EM map, using the correlation about the mean (cam) as metric. I use a command like this: fitmap #0 #1 resolution 6 metric cam search 100 radius 150 However, only the correlation about zero is reported in the final fit list (and used to rank the solutions). Where can I find the cam values for all the fits? Thank you Michele

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MatchMaker
by Ward, Miriam L. (CDC/OID/NCIRD) 24 Sep '18

24 Sep '18

Hello, I used MatchMaker to superimpose a couple of models. Now when I open any .pdb files, they automatically superimpose. How can I "turn off" MatchMaker so it doesn't automatically superimpose everything? Thanks, Leanne M. Leanne Ward, MEd. Microbiologist II Cherokee Nation Assurance contractor Rotavirus Surveillance and Molecular Epidemiology Team Gastroenteritis Viruses Branch Division of Viral Diseases, NCIRD, CDC Mailstop G04 1600 Clifton Rd. N.E. Atlanta, Georgia 30329 U.S.A. Phone: (404) 639-3265 Email: mrw0(a)cdc.gov<mailto:mrw0@cdc.gov>

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Hiding AutoDock Vina Search Volume (frame)
by leifepeterson＠sbcglobal.net 24 Sep '18

24 Sep '18

Using Select-->Chains-->(no ID), I can select the AutoDock Vina Search Volume structure after performing a docking, but once it's selected (highlighted in green), I can't seem to remove it from the molecular plot. What is the recommend way to remove the square frame?

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Re: [Chimera-users] Placing Autodock Vina Pocket around AA residues from RaptorX
by Leif Peterson 20 Sep '18

20 Sep '18

Hi Elaine, Thanks for the tip on the center command, and looking up the Swiss-Prot method. Leif Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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Placing Autodock Vina Pocket around AA residues from RaptorX
by leifepeterson＠sbcglobal.net 20 Sep '18

20 Sep '18

Couple newbie questions: 1. I don't know if any users have run RaptorX (U-Chicago) for ligand-residue pocket prediction, but the results simply tell you the specific AA residues are which are close to the pocket For example the locations could simply be e.g. the residues K252, Q256, and K260 in the input PDB file. So my question in terms of AA annotation in Chimera is, how could I center Autodock Vina's pocket box around residues something like K252, Q256, and K260? I looked through the select options and didn't see where numbered residues could be selected. 2. For 3D modeling when x-ray crystallography results are not available in PDB, I commonly will submit a protein's FASTA sequence to SWISS-MODEL, and then download the PDB and go through dock prep for the receptor and minimization of the ligand(and adding e.e. hydrogens, etc.) Isn't the SWISS-MODEL approach an alternative for using the MODELLER add-on for homology modeling. The MODELLER run I just went through was really using a lot of core resources, and the BLAST template results were complexes between receptors and ligands, and sometimes DNA. So isn't there an advantage to inputting a FASTA from Uniprot into SWISS-MODEL to obtain the predicted 3D structure, when compared with the BLAST results required during MODELLER runs?

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chimerax mesh commands doesn't work
by Yehuda Halfon 20 Sep '18

20 Sep '18

Hi all, I wanted to use chimeraX to use some commands on mesh display. Some works like meshLightning but others like lineThickness doesn't I use volume #1 lineThickness 10 (or any other integer) but nothing seems to change. What am I doing wrong? Yehuda Halfon

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change the center of a pdb model
by C.J. 19 Sep '18

19 Sep '18

Dear specialists, When I opened two pdb files of icosahedral model(two structures of the same virus), I found both center didn't overlap. My question is how to change the origin of a pdb model to overlap both. Thank you! -- Best regards! Jianhao Cao

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How to show ligand pocket as wireframe mesh
by leifepeterson＠sbcglobal.net 19 Sep '18

19 Sep '18

I ran a ligand-receptor prediction for a protein at Site-hound, and downloaded all the files. Is there a Chimera tutorial which shows how to display the volume a selected cluster inside the protein as a wireframe mesh? My guess is that the volume will be between all the AA residues in the given cluster(?) Once I can show the mesh, I will then go through the Autodock Vina run using ligands in a mol2 file, to sort their energies.

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FW: Question for using Chimera 1.8
by Williams, Joanne 17 Sep '18

17 Sep '18

From: Shabnam Nadjafi <shabnam.nadjafi(a)gmail.com> Date: Monday, September 17, 2018 at 12:29 AM To: "chimera(a)cgl.ucsf.edu" <chimera(a)cgl.ucsf.edu> Subject: Question for using Chimera 1.8 Dear Manager I am a pharmacologist and I decide to publish a book about drugs and some biochemicals by in silico evaluation of the chemical structures with biologic targets. I have to use the impressive software "Chimera 1.8". Would you please give me some information about this? Is it enough to cite "Chimera 1.8" in "Foreword" or "Preface" sections of the book? Is it free to use "Chimera 1.8" for publishing a book? Sincerely Yours Shabnam Nadjafi M.D. PhD of Pharmacology Neuroscience Research Center, Iran University of Medical Sciences, Tehran, Iran

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Add to discussion group
by Ayala Carl 17 Sep '18

17 Sep '18

To whom this may concern, I am a chimera user and have been having some difficulty opening structural measurement file. I would like to join the discussion group to post a question regarding this topic. Thanks, Ayala

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Atom specifiers for selected atoms
by BuddySphinx 16 Sep '18

16 Sep '18

Dear Chimera users, I have a simple question, if I have selected some atoms from my coordinates using mouse and draw a square. How do I know which atoms I have selected? Is there any way to show the atom specifier? Best, Yangqi Sent from Mail for Windows 10

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Calculating surface area
by Yangqi Gu 14 Sep '18

14 Sep '18

Dear Chimera users, I am trying to visualize the interface surface of my two monomers. Is there anyway to show the interacting surface from Chimera by using the EM map? Or should I do it from PDB coordinates? Best, Yangqi -- Yangqi Gu Graduate Student Malvankar Lab Yale University, West Campus

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Morph colors
by Rajan Prabu 14 Sep '18

14 Sep '18

Hello again, Following another old thread, http://plato.cgl.ucsf.edu/pipermail/chimera-users/2016-September/012743.html I could morph/play the coordinates and Volume at the same time. The script is given below. ---------------------------------------------------- # Open maps and set threshold open 1.mrc open 2.mrc open start_full.pdb open end_full.pdb vol #0,1 level .025 # Create a marker for coloring measure center #2 mark true radius 20 color red ~display #4 # Create morph volume vop morph #0,1 frames 0 model #5 # Create morph models model #6 morph start #2 frames 200 morph interpolate #3 frames 200 morph movie # marker on morph measure center #6 mark true radius 20 color red # Color near marker scolor #5 zone #6 range 50 coordset #6 1,100; vop morph #0,1 start 0 playstep 0.01 frames 100 model #6 ---------------------------------------------------- Still the color is at centre of of the first Frame of morph. If I understand correct I have to measure the centre for each Frame and add marker and color it. But I still can't make it. Any help/directions in this regard would be very helpful. Thanks in advance for your time and help. best regards Rajan

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Open Structural Measurement table
by Ayala Carl 13 Sep '18

13 Sep '18

Hi, I have been having difficulty opening a previously saved table of measured distances. I cannot open in as any file type listed by chimera and unfortunately I did not save the session that I measured the distances. If I open my models is there a way to impose the distances saved to the opened models? Thanks in advance

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Morph colors
by Rajan Prabu 13 Sep '18

13 Sep '18

Hello all, First please accept my apologies for to open a topic which is discussed already, but I couldn't get it working. I would like to morph a volume and colour its subregions. I made the following script ( adopting old messages in this forum ) open 1.mrc open 2.mrc open start_full.pdb open end_full.pdb vol #0,1 level .025 # Create a marker for coloring measure center #2 mark true radius 20 color red ~display #4 # Create morph vop morph #0,1 frames 0 model #5 # Color near marker scolor #5 zone #4 range 50 #Play morph vop morph #0,1 model #5 frames 200 interpolateColors false In the above script everything works, but color stays at place. Unfortunately for my morphing the marker has to move along with the morph. But I dont know how to do that. Any help in this regard would be very helpful. best regards Rajan

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Errors applying AddCharge to PDB files with non-Chimera protonation
by Matthias Bal 12 Sep '18

12 Sep '18

Hi, I have a large amount of PDB files which need explicit hydrogens for MD and quantum calculations. To go beyond Chimera's AddH function, I've tried using the Protoss tool among others. Trying to add charges (AMBER ff14SB) using Chimera to PDB files protonated in this way leads to errors regarding non-standard atom names in standard residues. For example, the protonated PDB case 1amw gives the following errors in the Reply Log: > Non-standard atom names: > ALA H (ALA 2.A H) > Total charge for #0: -12.939 > The following residues had non-integral charges: > ALA 2.A 0.4009 > LYS 102.A 0.66 > Correct charges are unknown for 1 non-standard atom names in otherwise standard residues > Charges of 0.0 were assigned to the unknown atoms I know the suggestion of the help page on AddCharge is to remove the hydrogens and re-add them using AddH since they are often the problem, but that's not really an option in this case. Is there an overview somewhere of all the different PDB hydrogen naming conventions (like a more recent version of https://www.ics.uci.edu/~dock/pdb2pqr/programmerguide.html) and how they relate to what Chimera/Amber is using? And is there a way to script the conversion to treat files in batches? Thanks a lot, Matthias

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Unix download
by KEITH MUNSON 10 Sep '18

10 Sep '18

Hi Chimera, I downloaded chimera-1.13-linux_x86_64.bin <http://www.cgl.ucsf.edu/chimera/cgi-bin/secure/chimera-get.py?file=linux_x8…> into my Dell desktop Downloads dir but there was no chimera-installer.bin included in the download. Where do I get the installer? Thanks, Keith Munson

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Writing models in PDB only working via model panel, not via drop-down menu (UCSF Chimera 1.3)
by Jun Ha Song 10 Sep '18

10 Sep '18

Dear RBVI, I noticed that I could not write .cmm marker sets in UCSF Chimera as PDB file via drop down menu from main window, but that I could write it as PDB via Model Panel's side menu. Is this a bug? Best, Junha Song.

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max density value using a script
by Tamas Hegedus 07 Sep '18

07 Sep '18

Hi, I subtract two electron density maps and I would like to get the min and max density values of the resulted map. I can see these values in the GUI, but I would like to get them running chimera without a gui using a python script. (Without saving the final map into an .mrc file and reading the header of that file.) Thanks for your help, Tamas -- Tamas Hegedus, PhD Senior Research Fellow Department of Biophysics and Radiation Biology Semmelweis University | phone: (36) 1-459 1500/60233 Tuzolto utca 37-47 | mailto:tamas@hegelab.org Budapest, 1094, Hungary | http://www.hegelab.org

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calculate density from an AA model
by Tamas Hegedus 06 Sep '18

06 Sep '18

Hi, Is there an option (command, tool) in Chimera to calculate the theoretical electrondensity map for an all atom protein model? Similar to the MDFF tool in VMD. https://www.ks.uiuc.edu/Training/Tutorials/science/mdff/tutorial_mdff-html/… Thanks, Tamas -- Tamas Hegedus, PhD Senior Research Fellow Department of Biophysics and Radiation Biology Semmelweis University | phone: (36) 1-459 1500/60233 Tuzolto utca 37-47 | mailto:tamas@hegelab.org Budapest, 1094, Hungary | http://www.hegelab.org

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Visualizing major and minor axes of inertia
by Felipe Vasquez 05 Sep '18

05 Sep '18

Dear all, I am interested in visualizing the major and minor axes of inertia of a ligand in a PDB structure by using UCSF Chimera. Once I calculate the axis of inertia by entering in command line: measure inertia sel I obtained the following info (in reply log): v1 = 0.985 -0.173 -0.013 a = 6.079 r1 = 2.103 v2 = -0.086 -0.553 0.829 b = 4.564 r2 = 2.765 v3 = -0.150 -0.815 -0.559 c = 1.127 r3 = 3.400 center = 38.682 56.595 62.547 However, I do not still know: 1- What are the major and minor axes of inertia? This info is given by the "a/b/c" or "r1/r2/r3" values? 2-How can I visualize the major and minor axes of inertia as planes (or arrows)? Thanks in advances for your help. Best regards, *Andrés Felipe Vásquez J., BSc, MSc.* PhD candidate in Chemical Engineering Universidad de los Andes Bogotá, D.C., Colombia Carrera 1 #18A-12, Of. ML-754(26) +57 1 3394949 Ext. 1747

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ChimeraX and crosslinks visualization
by Pascal Albanese 04 Sep '18

04 Sep '18

Dear Support Staff, first of all many thanks for developing Chimera! I'm using ChimeraX to integrate CryoEM and crosslinking MS data.I think that some features might be further implemented (or maybe are already there but i don't know how to use them): - Is it possible to load different sets of distances/crosslinks (like with different IDs)? - is it possible to color code the distances with a cutoff (like red if >30 for instance)? - The histogram and network is a nice feature, but it would be nice if there were some grouping based on the distances (i.e.: 1 to 5 A; 5 to 10 A, 10 to 15 A... etc), and then you can click on the column representing your distances class to select them (so you can make a subgroup, or delete them, or edit them etc...) that's it, maybe something can be done writing the code but unfortunately it's not my job. Thanks a lot and looking forward to hear from you, Cheers, Pascal -- Pascal Albanese, PhD *Post-doc*, Politecnico di Torino Dipartimento DISAT, BioSolar Lab@Environment Park Via Livorno 60 10144 Torino e-mail: pascal.albanese(a)polito.it Phone number: +39 011 2257655 <+39%20011%20225%207655>

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Re: [Chimera-users] Mirror image proteins
by Chu Ji 04 Sep '18

04 Sep '18

Hi Eric, I was trying to get a mirror image of a PDB model and came across your thread. I know that you are typing in m = chimera.openModels.list()[0] for a in m.atoms: crd = a.coord() crd.z = 0 - crd.z a.setCoord(crd) in the Gen Control>IDLE section, but I also read on GitHub that I should change the [0] in openModels.list()[0]to the model specifier. What does that mean exactly? I tried to type in the PDB ID to replace the 0 but nothing happened…Could you show me an example? What if I want to flip Chain B of a certain model or just the entire model? Thank you so much for your help! Looking forward to hearing from you. Best, Nancy Sent from Mail for Windows 10

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Chimera: Amber to PDB
by Boris TOUZEAU 04 Sep '18

04 Sep '18

Hi, I am Boris TOUZEAU, actually a PhD student at the National Taiwanese University (NTU) based in Taipei. I had a question about chimera; Is it possible to output pdb files having amber residues naming convention instead of pdb residues naming convention ? I saw it was possible to do it for the atoms (ligands) but I would be more interested to do it for residues. Best wishes, Boris TOUZEAU

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chimera error during AddCharge for MD preparation
by Waterbury, Amanda 04 Sep '18

04 Sep '18

Hi, I am attempting to perform MD stimulations with a protein containing an FAD cofactor, however, I keep receiving the following error message: Charge model: AMBER ff14SB Assigning partial charges to residue FAD (net charge -2) with am1-bcc method Running ANTECHAMBER command: /Users/alwaterbury/Desktop/Chimera.app/Contents/Resources/bin/amber14/bin/antechamber -ek qm_theory='AM1', -i /var/folders/wd/pdz6gvr12ybbxtfs6m6mn1y80000gn/T/tmpUR9bIs/ante.in.mol2 -fi mol2 -o /var/folders/wd/pdz6gvr12ybbxtfs6m6mn1y80000gn/T/tmpUR9bIs/ante.out.mol2 -fo mol2 -c bcc -nc -2 -j 5 -s 2 (FAD) (FAD) dyld: Library not loaded: /usr/local/lib/libquadmath.0.dylib (FAD) Referenced from: /Users/alwaterbury/Desktop/Chimera.app/Contents/Resources/lib/libgfortran.3.dylib (FAD) Reason: image not found (FAD) Running: /Users/alwaterbury/Desktop/Chimera.app/Contents/Resources/bin/amber14/bin/bondtype -j part -i ANTECHAMBER_BOND_TYPE.AC0 -o ANTECHAMBER_BOND_TYPE.AC -f ac (FAD) (FAD) Running: /Users/alwaterbury/Desktop/Chimera.app/Contents/Resources/bin/amber14/bin/atomtype -i ANTECHAMBER_AC.AC0 -o ANTECHAMBER_AC.AC -p gaff (FAD) Total number of electrons: 408; net charge: -2 (FAD) (FAD) Running: /Users/alwaterbury/Desktop/Chimera.app/Contents/Resources/bin/amber14/bin/sqm -O -i sqm.in -o sqm.out (FAD) Error: cannot run "/Users/alwaterbury/Desktop/Chimera.app/Contents/Resources/bin/amber14/bin/sqm -O -i sqm.in -o sqm.out" of bcc() in charge.c properly, exit Failure running ANTECHAMBER for residue FAD Check reply log for details Any help/suggestions would be much appreciate! Best, Amanda

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