[chimerax-users] generating icosahedron from pentamer

[Elaine Meng]

P.S. if you got 5 icosahedra before and any of them is correct, presumably you could just delete the others.  However, you would need to look carefully to decide if it was correct.

Elaine


> On Mar 25, 2021, at 11:40 AM, Elaine Meng <meng at cgl.ucsf.edu> wrote:
> 
> Hi Ibrahim,
> I don't know what symmetry specification is needed to make one icosahedron from your pentamer.  It depends on the specific coordinates of the pentamer, but is not easy to tell from those coordinates (as you can see).  If #2 is a map of the whole icosahedron, maybe you could try using commands:
> 
> measure symmetry #2
> ...maybe with options, see the help:
> <https://rbvi.ucsf.edu/chimerax/docs/user/commands/measure.html#symmetry>
> 
> ...followed by something like
> sym #1 symmetry #2
> 
> ... with other options, e.g. "center" like you used before, see the help:
> <https://rbvi.ucsf.edu/chimerax/docs/user/commands/sym.html#symmetry>
> 
> I don't know if this process would work, however; requires that "measure" is able to detect the needed symmetry from the map.
> I hope this helps,
> Elaine
> -----
> Elaine C. Meng, Ph.D.                       
> UCSF Chimera(X) team
> Department of Pharmaceutical Chemistry
> University of California, San Francisco
> 
> 
>> On Mar 25, 2021, at 10:03 AM, Moustafa, Ibrahim M. <ria2 at psu.edu> wrote:
>> 
>> Dear all,
>>  I want to generate icosahedral structure from a pentamer (chains A-E). When I use the command:
>> 
>>   sym #1 i,222 coordinateSystem #2 center #2
>> 
>>  It generated 5 copies, icosahedron for each chain.
>> 
>> What I'd like to build is just 12 copies of the pentamer in an icosahedral sym.
>> 
>>  How to do that in ChimeraX?
>> Thanks,
>> Ibrahim