Re: [ccp4bb] SHELXL refinement with TYR on special position

2017-01-24 Thread George Sheldrick
Dear Francis, You need to put the atoms starting with CG into PART -1 to prevent them clashing, and reset the occupancies to 10.5 (i.e. fixed at 0.5). There must be another disorder component pointing somewhere else (also with half occupancy). SHELXPRO has been made obsolete by Anna Luebben'

[ccp4bb] SHELXL refinement with TYR on special position

2017-01-24 Thread Francis Reyes
Hi all I'm trying to refine a structure with a tyrosine sitting on a special position , or maybe it's some disorder.. or Suggestions? https://i.imgsafe.org/7cfbf83a38.jpg Using just FLAT, CHIV,DFIX, and DANG from shelxpro doesn't work. Thanks, Francis

Re: [ccp4bb] SHELXL refinement

2010-02-12 Thread Ajit Datta
: [ccp4bb] SHELXL refinement To: CCP4BB@JISCMAIL.AC.UK > I haven't had the good fortune of using SHELXL in a few years, but I > seem to > recall that you need to make sure that you don't have an END statement > preceding your newly added waters. Check this after each cycle

Re: [ccp4bb] SHELXL refinement

2010-02-12 Thread Kevin Jude
I haven't had the good fortune of using SHELXL in a few years, but I seem to recall that you need to make sure that you don't have an END statement preceding your newly added waters. Check this after each cycle of SHELXWAT. best wishes kmj On Fri, Feb 12, 2010 at 1:45 PM, Ajit Datta wrote: > H

Re: [ccp4bb] SHELXL refinement

2010-02-12 Thread Brad Bennett
Hi Ajit- Sounds like maybe you haven't defined the refinement to include your waters explicitly. Did you edit the parameter list near the top of the .ins file (like ISOR, CONN, BLOC commands) to include your newly added waters? HTH- Brad On Fri, Feb 12, 2010 at 4:45 PM, Ajit Datta wrote: > Hell

[ccp4bb] SHELXL refinement

2010-02-12 Thread Ajit Datta
Hello everyone, I have one more non-CCP4 related question again. I have been trying to refine a structure using SHELXL at ~1.0A. I added waters using SHELXWAT, however, it seems that the water molecules are not getting refined in the subsequent cycles. (B factor is at 50.00 for all of them).

Re: [ccp4bb] shelxl, refinement of occupany

2007-03-21 Thread George M. Sheldrick
Refining a common occupancy (using one free variable) for a loop that is in poor density is well worth trying. The loop may well have multiple conformations and this may make it easier to find a second conformation in the difference map. I also recommend refining the occupancies of any selenium

[ccp4bb] shelxl, refinement of occupany

2007-03-21 Thread U Sam
I am looking for some advice. (1) In shelex what should I mention to refine occupancy. I have two molecule in asym unit. In A molecule residues 89-92 is present, but in B these residues are missing. So I believe in B these residues should not be with zero occupancy, although I donot find any pr