Atom Nomenclature for NLG

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 NLG

Atom Name (V3) Atom Name (V2)
CA CA
C C
OXT OXT
O O
CB CB
CG CG
CD CD
OE1 OE1
OE2 OE2
C7 C7
C8 C8
O7 O7
N2 N2
HA HA
HXT HXT
HBC1 1HBC
HBC2 2HBC
HGC1 1HGC
HGC2 2HGC
HE2 HE2
H8C1 1H8C
H8C2 2H8C
H8C3 3H8C
H2 H2