
I have a pdb with a homodimeric conformation for two alpha helix transmembrane domains.

This structure features a cross-like conformation, interacting at given residues.

I want to rotate each of the domains 15º along the z-axis.

So for example, something like this would be fine:

select :.A                (select chain A)
turn z -15 @ca,cb  (rotate chain A 15º, from the residues given as an anchor point)

Is there anything like this? Thx