[AMBER] CPPTRAJ: sign convention for dihedral angles!!

From: Cenk Andac via AMBER <amber.ambermd.org>
Date: Fri, 19 Aug 2022 10:28:21 +0300

Hi,
I have determined ALPHA (see below for the command line) dihedral angles
through a trajectory of an RNA simulation.

dihedral G2-alpha :1.O3' :2.P :2.O5' :2.C5' out g2-alpha.dat type alpha

the alpha dihedral angles are supposed to be around g- conformer but stat
output file says the dihedral angles are around g+ as follows


STATISTICS G2-alpha
  AVERAGE: 65.8043 (10.0676 stddev)
  INITIAL: 64.6928
  FINAL: 57.9292

               g+ a+ t a- g- c
           -------------------------------------------------------
%occupied | 99.1 | 0.8 | | | | 0.0 |


I am wondering if this is a bug or a different sign convention that I need
to know.

Best,

Cenk
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Received on Fri Aug 19 2022 - 01:00:04 PDT
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