Re: [ccp4bb] Refmac: removing selected ligand hydrogens after making a link

2018-03-29 Thread James Holton
After outputting the hydrogens, delete the ones you don't want and from 
then on do refinement with:


make hout Y
make hydr Y

When you do that, refmac will keep the hydrogens you put in, and also 
put them in the output.


-James Holton

MAD Scientist


On 3/29/2018 2:11 PM, Phil Jeffrey wrote:
I've got a couple of instances where I have non-standard amino acids, 
nevertheless present in the monomer dictionary, that have additional 
non-peptide covalent linkages.  I've figured out how to define these, 
but if I opt to output hydrogens as a diagnostic I see that Refmac 
doesn't delete the ligand hydrogens that were present at the linkage 
point.


Nothing catastrophic happens in refinement but extra atoms lying along 
other covalent bonds makes me a little queasy.


Is there something (non-obvious) in additional user-defined .cif 
library that I can use to do this ?  Do I simply define a new version 
of the monomer (w/o errant hydrogen) and hope that it overwrites the 
previous definition ?


I'm doing this at borderline atomic resolution.

Thanks
Phil Jeffrey
Princeton


[ccp4bb] Refmac: removing selected ligand hydrogens after making a link

2018-03-29 Thread Phil Jeffrey
I've got a couple of instances where I have non-standard amino acids, 
nevertheless present in the monomer dictionary, that have additional 
non-peptide covalent linkages.  I've figured out how to define these, 
but if I opt to output hydrogens as a diagnostic I see that Refmac 
doesn't delete the ligand hydrogens that were present at the linkage point.


Nothing catastrophic happens in refinement but extra atoms lying along 
other covalent bonds makes me a little queasy.


Is there something (non-obvious) in additional user-defined .cif library 
that I can use to do this ?  Do I simply define a new version of the 
monomer (w/o errant hydrogen) and hope that it overwrites the previous 
definition ?


I'm doing this at borderline atomic resolution.

Thanks
Phil Jeffrey
Princeton