In Coot (0.3.2 and later) you could also try the following:
- center on the serine to be phosphorylated
- click Extensions->Phosphorylate this residue
and Coot will sort out phosphorylation, renumbering etc in no time.


JED




-----Original Message-----
From: CCP4 bulletin board [mailto:[EMAIL PROTECTED] Behalf Of U
Sam
Sent: 04 September 2007 23:42
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] covalently bonded Ligand fit


Hi 
I am trying fit a ligand (organo phosphate) covalently bonded to residue Serine 
250 in my structure.
How can I connect this phosphate to Ser-O and during refinement (refmac and 
CNS), how should I mention in the ligand in the input and how should I number 
it? I use COOT as graphics. 
Thanks for suggestion.
Sam. 
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