[Chimera-users] 来自pengweiyucas的邮件

[Elaine Meng]

Hello,
If the bond already exists in the structure, for example the S-S bonds in PDB 1zni (insulin), you can use commands:

select disulfide
select up
show sel
~sel

These commands select the S-S bond, then increase selection to whole residues containing those bonds (since you don’t just want a bond by itself), then shows the selected atoms, then clears the selection.
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/select.html>
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/atom_spec.html#builtin>

However, if your structure only has two S atoms that are in bonding distance but no bond between them, Chimera does not automatically draw a bond.  You would have to select those two atoms and then add a bond manually, e.g. with Tools… Structure Editing… Build Structure, Adjust Bonds section, or with the “bond” command.
<http://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/editing/editing.html#bond>
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/bond.html>

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

> On Jun 19, 2018, at 5:57 AM, pengweiyucas <pengweiyucas at 163.com> wrote:
> 
> Dear sir:
>       I want to know how to show the disulfide bond ?  Thank you !