Re: [COOT] disulfide bond breaks in coot 0.9.6

2022-05-15 Thread Paul Emsley


On 11/05/2022 22:28, Kenneth Satyshur wrote:
I have a disulfide bond defined in the pdb as SSBOND. It shows up in 
coot as a link between the sulfur atoms. But when I use 'sphere 
refine' the link is broken and there is no disulfide bond.



That doesn't sound right. How close are the SG atoms?



The same happens for my CYS  to ZN ligands.



That's completely different.



They are defined with a 'LINK' line in the pdb.



OK. So coot should use the metal restraints then.


How do I tell 'sphere refine' to not break these links? Do I need to 
define a restraint explicitly?




You shouldn't need to - it should do the right thing. But it seems like 
it isn't doing so in this case - that sounds like a bug.



Paul.




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[COOT] disulfide bond breaks in coot 0.9.6

2022-05-11 Thread Kenneth Satyshur
I have a disulfide bond defined in the pdb as SSBOND. It shows up in coot as a 
link between the sulfur atoms. But when I use 'sphere refine' the link is 
broken and there is no disulfide bond. The same happens for my CYS  to ZN 
ligands. They are defined with a 'LINK' line in the pdb. How do I tell 'sphere 
refine' to not break these links? Do I need to define a restraint explicitly?
thanks


Kenneth A. Satyshur, M.S., Ph.D.

Senior Scientist,

College of Ag and Life Sciences: Department of Bacteriology;

School of Medicine and Public Health:

Departments of Biomolecular Chemistry,

Neuroscience, Oncology, and Carbone Cancer Center

(Small Molecule Screening Facility)

University of Wisconsin-Madison

Madison, Wisconsin, 53706

608-215-5207



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