[Chimera-users] make helical filament model using command sym

[Yaowang Li]

Dear all,


I have built a model from cryo-em density map, now I am going to create a
model of a filament (have a length of the pitch, over 1000 A) from it.

I think the command 'sym' can do it, but not easy for me. I have tried many
times.

sym  #0  group  h,rise,twist,100

or
sym  #0  group  c2*h,rise,twist,100 coord #1
or
sym  #0  group  h,2.292,179.6,100 coord #1

the model is wrong




I also try to measure the symmetry first
and
sym  #0  group #1



it is almost right, but I need much longer, how set it? using the 'n'
parameter? and how?
and if I want to set rise and twist myself, how to do it?



Best wishes,


Yaowang
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://plato.cgl.ucsf.edu/pipermail/chimera-users/attachments/20180613/a090ebd8/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 24707 bytes
Desc: not available
URL: <http://plato.cgl.ucsf.edu/pipermail/chimera-users/attachments/20180613/a090ebd8/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 146468 bytes
Desc: not available
URL: <http://plato.cgl.ucsf.edu/pipermail/chimera-users/attachments/20180613/a090ebd8/attachment-0001.png>