[Chimera-users] How to model a loop using a template

Elisa Pieri elisa.pieri90 at gmail.com
Fri Mar 11 01:54:37 PST 2016

Dear all,

I have installed Chimera on my computer, but I am still new to the program,
so forgive me if my question is trivial.

I have a nmr structure (completely defined) and a X-ray structure of the
same protein, but this last structure has a missing loop. How can I model
this missing loop in the x-ray structure using the nmr structure as
template (i.e. freezing the x-ray structure and adding only the nmr loop)?

I tried opening both structures and using the Tools > Structure Editing >
Model/Refine Loop, but if I choose the x-ray structure, then I don't see
where to state that I want to use the nmr structure as template.

I hope that I explained my problems.
Can you help me?

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