Hello Stefano--

> I'm new in using xplor-nih and i'm trying to generate a model of a
> cyclic peptide using the protocol sa.inp, refine.inp and accept.inp
> based on NOE restraints obtained from noesy experiment. In particular
> for the NOE restraint I'm using the  SUM averaging with SQUARE
> potential and scale 50. After the calculation the models obtained as
> accepted presented some interatomic distances that were out of the
> range of the corresponding NOE restraint, but the log of the
> accept.inp calculation didn't contain any highlighted violations and I
> don't understant why. Can some one  point out something that can
> explain this discrepancy?
> 

I strongly suggest you run your calculations using the Python
interface, rather than legacy scripts. A new set of nicely-documented
example scripts can be found here:

 https://nmr.cit.nih.gov/xplor-nih/methodsMolBiol/

A simpler script (lacking the RDC setup) can be found in the
xplor-nih-tutorial-2016/gb1_simple directory in 

  https://nmr.cit.nih.gov/xplor-nih/xplor-nih-tutorial-2016.tgz

I hope this helps--
Charles
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