[phenixbb] Refine only selective chains in a complex using phenix.real_space_refine
Pavel Afonine
pafonine at lbl.gov
Tue Nov 29 06:46:11 PST 2016
Hi Tofayel,
> Is it possible using phenix.real_space_refine to locally refine a
> protein or RNA chain (against a cryo-EM map) which is part of a big
> complex.
no, sorry. Options:
1) Create PDB file that contains only parts of the model that you want
to refine and supply that to phenix.real_space_refine. This may work
just fine but dangers are that refined part of the model may clash with
the one that is not refined
2) Refine entire model restraining positions of selected atoms to their
initial coordinates.
> During the run, I would like to keep most of my complex constant in
> space except neighboring one or two protein/RNA molecules which I
> would like to see getting adjusted to remove clashes. I am using the
> program through command-line.
I can see how this may be useful and I will add this functionality to
phenix.real_space_refine.
Just out of curiosity: why you want to keep some parts of the model fixed?
Pavel
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