Atom Nomenclature for 3DS

The atom nomenclature in PDB data files was revised with the release of data in the PDB Format Version 3.0. These changes make the PDB atom names used by PDB compliant with existing IUPAC nomenclature for standard amino acid and nucleotides (Pure & Appl. Chem., 70, 117-142, 1998) with the exception of the well established convention for C-terminal atoms OXT and HXT. A small number of additional changes were introduced in Version 3 to make atom labeling more conventional. The following chemical diagrams and tables provide the correspondences between atom names used in Version 3 and Version 2 PDB formats.

Labeled Chemical Diagrams

Chemical diagram with format V3 atom labels (heavy atoms)
Chemical diagram with format V3 atom labels (all atoms)
Chemical diagram with format V2 atom labels (heavy atoms)
Chemical diagram with format V2 atom labels (all atoms)

Atom Name Correspondences for 3DS

Atom Name (V3) Atom Name (V2)
OAA OAA
OAB OAB
OAC OAC
OAD OAD
OAE OAE
CAF CAF
CAG CAG
CAH CAH
CAI CAI
CAJ CAJ
CAK CAK
CAL CAL
HOAC HOAC
HOAD HOAD
HOAE HOAE
HAF HAF
HAG HAG
HAGA HAGA
HAK HAK
HAL HAL