Thank you so much for your prompt response Elaine. I was able to rotate using the torsion command.

I just have one more follow-up question. Once I have made the rotation, I want to save the pdb file with its name containing the new dihedral angle value e.g., 1GWO_73.pdb. Is it possible?

Thanks once again.

On Wed, Oct 9, 2024 at 9:21 PM Elaine Meng <meng@cgl.ucsf.edu> wrote:

Hi Prathvi,
Yes in both, but I'll answer for ChimeraX: see the "torsion" command
<https://rbvi.ucsf.edu/chimerax/docs/user/commands/torsion.html>

Regards,
Elaine
-----
Elaine C. Meng, Ph.D.
UCSF Chimera(X) team
Resource for Biocomputing, Visualization, and Informatics
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Oct 9, 2024, at 8:37 AM, Prathvi Singh via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:
>
> Hi Elaine,
>
> Is it possible to change the dihedral angle between any given four sets of atoms, say CA,CB,CG, HG2 of a Lysine residue using command line in either chimera/chmeraX?
>
> Thanks in advance,
> Prathvi Singh,
> Research Fellow,
> Department of Biological Sciences & Bioengineering,
> Indian Institute of Technology, Kanpur-208016