Atom Nomenclature for OPY

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 OPY

Atom Name (V3) Atom Name (V2)
C C
N N
O O
CA CA
CB CB
NAA NAA
CAD CAD
CAE CAE
CAF CAF
CAG CAG
CAI CAI
CAJ CAJ
NAM NAM
HN HN
HNA HNA
HA HA
HB HB
HBA HBA
HNAA HNAA
HNAB HNAB
HAD HAD
HADA HADA
HAE HAE
HAEA HAEA
HAF HAF
HAFA HAFA
HAG HAG
HAGA HAGA
HAI HAI
HAIA HAIA
HAJ HAJ
HAJA HAJA