As far as I know there are no repulsions restraints applied if the sum of the atoms occupancies is <=1.0. If one atom is fully occupied. and another partial then there will be a restraint.

Eleanor

On 12/08/2010 04:45 PM, Keitaro Yamashita wrote:
Dear Ed,

These tables were reported by Refmac5:

Before refinement,
-------------------------------------------------------------------------------
              Restraint type              N restraints   Rms Delta   Av(Sigma)
  .....
VDW repulsions: symmetry: refined_atoms          38     0.232     0.200
VDW repulsions: symmetry: others                100     0.393     0.200
HBOND: symmetry: refined_atoms                   11     0.229     0.200
HBOND: symmetry: others                           1     0.120     0.200
  .....
-------------------------------------------------------------------------------

After refinement,

VDW repulsions: symmetry: refined_atoms          27     0.190     0.200
VDW repulsions: symmetry: others                 76     0.262     0.200
HBOND: symmetry: refined_atoms                   13     0.225     0.200


I thought that meant there's vdw repulsion energy among symmetry
related atoms, which I want refmac5 to ignore.


K. Yamashita

2010/12/9 Ed Pozharski<[email protected]>:
On Thu, 2010-12-09 at 01:09 +0900, Keitaro Yamashita wrote:
When I tried to refine using Refmac5, the output told many vdw
repulsions with symmetry mates

What do you mean by that? I had a similar situation recently, and there
are many records in the log file that say something like this

  INFO:     link is found (not be used) dist=   1.531 ideal_dist=
1.500
            ch:AA   res: 217  GLN      at:C   .->ch:FF   res: 217  GLN
at:CA  .

Note the "not be used" part.  AFAIU, these clashes are simply reported
but ignored in refinement.  Perhaps some keyword like "monitor none"
shall turn these warnings off, but other than making your log-files very
long it's not a problem.

--
"I'd jump in myself, if I weren't so good at whistling."
                               Julian, King of Lemurs

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