[ccp4bb] resolution limits

2017-07-26 Thread Andrew Marshall
Dear crystallographers, I have two datasets that were merged/scaled using ccp4's aimless, with resolution ranges of 52-1.7 and 57-1.9. However, upon refinement, the resolution range used by phenix.refine is 36-1.7 for one and 104-1.9 for the other. 1) Why does phenix.refine change the low

[ccp4bb] waters with positive FoFc peaks?

2017-04-13 Thread Andrew Marshall
oesn't contain these peaks (the offending waters look normal). Has any come across this before? Thoughts? Thanks, Andrew Marshall PhD Candidate Laboratory of Protein Crystallography Dept. of Molecular and Cellular Biology School of Biological Sciences The University of Adelaide

Re: [ccp4bb] Atom clashes in active site?

2016-12-20 Thread Andrew Marshall
Hi Scott, That would be great if you have some references handy? Thanks very much, Andrew Marshall PhD Candidate Laboratory of Protein Crystallography Dept. of Molecular and Cellular Biology School of Biological Sciences The University of Adelaide On Wed, Dec 21, 2016 at 1:48 AM, Scott Horowitz

Re: [ccp4bb] Atom clashes in active site?

2016-12-20 Thread Andrew Marshall
Hi Pavel, That worked a treat! Thanks again for your help, Andrew Marshall PhD Candidate Laboratory of Protein Crystallography Dept. of Molecular and Cellular Biology School of Biological Sciences The University of Adelaide On Tue, Dec 20, 2016 at 3:18 PM, Pavel Afonine <pafon...@gmail.

Re: [ccp4bb] Atom clashes in active site?

2016-12-19 Thread Andrew Marshall
Hi Pavel, To define a weak bond, would you use "geometry_restraints.edits { ... bond {... " , and just set a rough distance_ideal and a very high sigma (like say 5A)? Or are you referring to something different? Andrew Marshall PhD Candidate Laboratory of Protein Crystallog

Re: [ccp4bb] Atom clashes in active site?

2016-12-19 Thread Andrew Marshall
be closer (more like 2.8 or 2.7A). It may be that I've trapped another reaction intermediate (which would be cool), but I don't think that fits the density quite as well. Any thoughts/ideas? Thanks, Andrew Marshall PhD Candidate Laboratory of Protein Crystallography Dept. of Molecular and Cellular Biology

[ccp4bb] Atom clashes in active site?

2016-12-18 Thread Andrew Marshall
to tell phenix to ignore clashes between these specific atoms? Thanks, Andrew Marshall PhD Candidate Laboratory of Protein Crystallography Dept. of Molecular and Cellular Biology School of Biological Sciences The University of Adelaide