Any non-0standard amino acid should be labelled l-peptide I think..
TYC is labelled like this: ir NOT as a L-peptide so REFMAC is probably
sensible to believe a TER card is required..
chem_comp.desc_level
TYC TYC 'L-TYROSINAMIDE ' non-polymer25
13 .
On 7 Nov
I had a similar issue with refmac inserting TER card after some but
not all HETATM. It was inserting them before TYC (amidated tyrosine)
but not before norleucine or some of the other non-natural amino acids
I had. It might have something to do with the cif file and not
something particular to HETA
My feeling is that all non-standard amino acids should be labeled HETATM and
that the overzealous introduction of TER cards by Refmac is the bad thing, but
I might be mistaken…
Herman
Von: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] Im Auftrag von Eleanor
Dodson
Gesendet: Dienstag, 7. No
