A chemical component search through the Chemical Component Dictionary (http://www.rcsb.org/pdb/ligand/chemAdvSearch.do) should get you there fairly quickly. Just draw in the core amino acid N-CA(CB)-C=O and you should end up with a pretty comprehensive list (although you'll need to handle glycine separately). You'll probably end up needing to prune out a lot of non-amino acids, but that shouldn't be horribly arduous. An alternative approach might be to search by name at HIC-Up http://xray.bmc.uu.se/hicup/.<http://xray.bmc.uu.se/hicup/>
Cheers, Tristan ________________________________ From: CCP4 bulletin board <CCP4BB@JISCMAIL.AC.UK> on behalf of Debasish Chattopadhyay <debas...@uab.edu> Sent: Friday, 15 May 2015 9:46 AM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] modified amino acids I am looking for a list of all modified amino acids found in protein structures (in PDB). Three letter codes and geometry files will be wonderful. Thanks Debasish