[chimera-dev] icosahedron with a T number

[Elaine Meng]

Hi Wei,

Take a look at the "hkcage" command if you want hexagons and pentagons instead of triangles.  You give it the h and k values which are related to T number by the equation shown in that page:
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/hkcage.html>

For this kind of question (next time) you probably want the chimera-users at cgl.ucsf.edu mailing list, not chimera-dev which is more for programming questions.

Thank you for the good wishes -- you stay safe too!

I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Apr 9, 2020, at 4:21 PM, Wei Zhang <zhangwei at umn.edu> wrote:
> 
> Hello,
> 
> I have been playing with the icosahedron utility in Chimera. I really like this feature, especially with the sphere factor.
> 
> The current routine uses a subdivision factor to represent the number of triangles on an icosahedral surface. However this lattice is not the same as we see in icosahedral viruses, which use a T number to designate symmetry. With a subdivision number, there are always hexamers on any edge of the icosahedron, whereas in the virus structure this is not the case.
> 
> I am wondering if Chimera has an utility that can use the T number as the basis for building an icosahedron surface.
> 
> Thank you.
> 
> Hope everything is going well and stay safe!
> 
> Wei