- Chimera-users - RBVI Mailing Lists

Collaboratory
by Theodor Emil Gescher 30 Mar '17

30 Mar '17

Dear Chimeramasters and mistresses, I'm having some serious difficulty starting a collaboratory session in UCSF Chimera on Mac. I have tried both an outdated version (build 40427) and the latest (build 41367). I can't find any mention within the program of collaboratory, and because of the Mac OS I don't think it's possible to start a hub from outside Chimera. Is there an additional extension that needs to be downloaded and installed seperately? Yours studiously, Theo

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Re: [Chimera-users] [chimera-dev] (no subject)
by Elaine Meng 30 Mar '17

30 Mar '17

Hi Kavya, I think I understood you, but I can only repeat the same answer. I do not know of any way to get the axis in Chimera except by first superimposing two copies of the dimer. Open the AB dimer twice (A1-B1 and A2-B2), superimpose A1 to B2 and B1 to A2. Then if you still care about where the axis is you can calculate it from the already superimposed structures with “measure rotation.” Elaine > On Mar 29, 2017, at 10:05 AM, Kavya Shankar <kavshank(a)umail.iu.edu> wrote: > > Hi, > > To be more specific, I want to find the two-fold symmetry axis in the dimer so that when I rotate the original structure I get another structure that is similar to the first with the chains' positions interchanged. > > Thank you. > > Regards, > Kavya Shankar > > On Wed, Mar 29, 2017 at 12:18 PM, Elaine Meng <meng(a)cgl.ucsf.edu> wrote: > > > On Mar 29, 2017, at 9:01 AM, Kavya Shankar <kavshank(a)umail.iu.edu> wrote: > > > > Hi, > > Is it possible to find the axis of symmetry for a dimer? I am looking to rotate the dimer along this axis by 180 degrees so that I can compare the two structures. > > Thank you. > > Regards, > > Kavya Shankar > > Hi Kavya, > Why not just match (superimpose) one monomer to the other and compare directly? At least from the Chimera perspective, the question seems backwards because maybe you could figure out the axis AFTER matching. However, if the purpose of finding the axis is just to compare the monomers, I would just superimpose them and forget about the axis. If you had dimer A-B you could either “split” (command) and match A to B, or you could open A-B twice and match A1 to B2 (and/or B1 to A2). This page discusses the ways to superimpose structures in Chimera; probably Matchmaker (GUI or command) would be the easiest. > <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/superposition.html> > > After two models are superimposed, you can get the axis and rotation amount with command “measure rotation” > <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/measure.html#rotation> > > 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 > > P.S. seemed like a user question so I put it on the chimera-users list … chimera-dev is more for programming issues > > > _______________________________________________ > Chimera-dev mailing list > Chimera-dev(a)cgl.ucsf.edu > http://plato.cgl.ucsf.edu/mailman/listinfo/chimera-dev

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Scripting commands for existing morph
by Cristina Paulino 29 Mar '17

29 Mar '17

Dear all, I would like to create a movie from an existing morph between two pdb coordinates. I was able to create a movie via the GUI as described in the manual. However I prefer to use scripts as it allows me to control every single step. I would like to be able to define exactly which frames should be shown when. For example, I would like to define in a script that it should wait at endpoint one (first structure) for x number of movie frames. Then interpolate (morph) to the other endpoint (second structure) for x number of movie frames and then wait again for a specified number of movie frames. Or even more complicated rotate the molecule or superimpose something else while it is interpolating/morphing between the pdb coordinates. Can anyone help me out? I couldn't find any good description for this. Many thanks in advance Cristina

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Re: [Chimera-users] [chimera-dev] (no subject)
by Elaine Meng 29 Mar '17

29 Mar '17

> On Mar 29, 2017, at 9:01 AM, Kavya Shankar <kavshank(a)umail.iu.edu> wrote: > > Hi, > Is it possible to find the axis of symmetry for a dimer? I am looking to rotate the dimer along this axis by 180 degrees so that I can compare the two structures. > Thank you. > Regards, > Kavya Shankar Hi Kavya, Why not just match (superimpose) one monomer to the other and compare directly? At least from the Chimera perspective, the question seems backwards because maybe you could figure out the axis AFTER matching. However, if the purpose of finding the axis is just to compare the monomers, I would just superimpose them and forget about the axis. If you had dimer A-B you could either “split” (command) and match A to B, or you could open A-B twice and match A1 to B2 (and/or B1 to A2). This page discusses the ways to superimpose structures in Chimera; probably Matchmaker (GUI or command) would be the easiest. <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/superposition.html> After two models are superimposed, you can get the axis and rotation amount with command “measure rotation” <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/measure.html#rotation> 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 P.S. seemed like a user question so I put it on the chimera-users list … chimera-dev is more for programming issues

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ChimeraX Alpha release
by Eric Pettersen 28 Mar '17

28 Mar '17

Hi all, We have released an alpha version of ChimeraX. While it still lacks many features, it has enough useful new and fun features that you might want to take it out for a spin even if it doesn’t prove ready to be your day-to-day workhorse yet. Hope you like it! Home page: http://www.cgl.ucsf.edu/chimerax/ <http://www.cgl.ucsf.edu/chimerax/> Download page: http://www.cgl.ucsf.edu/chimerax/download.html <http://www.cgl.ucsf.edu/chimerax/download.html> —Eric Eric Pettersen UCSF Computer Graphics Lab

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来自"高振飞" <16110440015@fudan.edu.cn>的邮件
by 高振飞 28 Mar '17

28 Mar '17

Dear professor: I'm a student from Fudan University, I want use the software -- chimera. But I can't download it, can you send it to me by using E-mail? thank you very much. with my best regards yours sincerely Zhenfei Gao -- Zhenfei Gao(高振飞) Department of Macromolecular Science Fudan University 310 Yuejin Hall 220 Handan Rd. Shanghai, China 200433 M: +86-18516637266 QQ: 7693692

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Create an entire virus from Octant
by Li, Zongli 27 Mar '17

27 Mar '17

Hello, I am wonder if there is a way in Chimera to create an entire icosahedral virus map from an octant of the virus density map? Thanks, Zongli

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MD analysis outputting to file
by Neha Gandhi 23 Mar '17

23 Mar '17

Dear Chimera support, I want to calculate the centroid of the sugar ring and the distance from the centroid to another atom of amino-acid. I know this can be done using the Structure analysis tools in Chimera. I want to use distance command in the MD ensemble analysis and output it to the analysis to the text file. How can I write output per frame to a text file in Chimera? Your insight is appreciated. -- Regards, Dr. Neha S. Gandhi, Vice Chancellor's Research Fellow, Queensland University of Technology, 2 George Street, Brisbane, QLD 4000 Australia LinkedIn Research Gate

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Ensemble models
by Mohamed Noor 20 Mar '17

20 Mar '17

Hello. I have an ensemble of models from phenix.ensemble_refinement. I notice that Chimera automatically loads the models and displays only a subset of atoms as "atoms/bonds". Can I save this as a preset while changing other settings manually so that I can go back to the automatic preset if I make a mistake somewhere? Secondly, is it possible for Chimera to calculate rmsf of each residue and output the values to a CSV file? I would like to replot them in Excel. Thanks. Mohamed

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Looking at docked data with the receptor shows as surface
by Jonathan Y Wang 20 Mar '17

20 Mar '17

To whom it may concern, Hi! I recently docked a ligand onto a receptor using the AutodockVina tool and when I opened the data the ligand seemed to be placed in the middle of the trimer. I showed the receptor as surface and it seems as if the ligand is too big to fit inside any of the holes surrounding the trimer, but somehow it has placed itself inside. I additionally opened it using PyMol to double check the file, but it also seems too small to fit inside any of the holes. My inquiry is this: Does AutodockVina take into account surface projections when performing docking? Thank you so much for your time, Jonathan Wang

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