[Chimera-users] Unable to save file in pdb

Elaine Meng meng at cgl.ucsf.edu
Mon May 10 10:51:40 PDT 2021

Hi Neha,
An MRC file is a density map format.  You cannot save it as an atomic model, because it does not contain atomic coordinates.  

There is no tool in Chimera to create atomic structure instantly from a map.   Researchers use various programs to build atomic structures into a map or to build an atomic model separately and then fit it into a map, but it is generally an interactive process that takes many steps.  I am not an expert on this process, but you could read hundreds of research papers "Methods" sections to see descriptions of the ways in which it is done.

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

> On May 10, 2021, at 10:24 AM, Neha Goel <nehagoel24march at gmail.com> wrote:
> Dear Chimera,
> I have a .mrc file. I reopened the file in chimera and would like to save it in pdb. I am unable to save it. It needed the molecular model pdb. Kindly guide me the way to save it.
> Regards
> Neha Goel

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