[phenixbb] constraining alpha-helical geometry in phenix

Ralf W. Grosse-Kunstleve rwgk at cci.lbl.gov
Tue Jun 10 11:18:29 PDT 2008

Hi Pascal,

> I am currently refining a structure at moderate resolution (~3.4A)  
> which is mainly composed of alpha-helices . Is there a way to  
> constrain the backbone geometry of the alpha helical regions in the  
> model used for refinement.

Luca Jovine has kindly contributed a perl script that converts HBPLUS
output to phenix geometry_restraints.edits. You can find it here:


We don't have much practical experience with this approach yet,
other that it works at a technical level. If you get a chance to
try it out, we'd be interested to know how much it helps in your


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