Atom Nomenclature for PXG

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 PXG

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
C2A C2A
C3 C3
O3 O3
C5 C5
C6 C6
C5A C5A
OP4 OP4
P P
OP1 OP1
OP2 OP2
OP3 OP3
C4 C4
C4A C4A
C7 C7
C8 C8
O2 O2
C9 C9
C10 C10
C11 C11
C12 C12
C13 C13
O8 O8
N9 N9
H2A1 1H2A
H2A2 2H2A
H2A3 3H2A
HO3 HO3
H6 H6
H5A1 1H5A
H5A2 2H5A
HOP1 1HOP
HOP2 2HOP
H4A1 1H4A
H4A2 2H4A
HO2 HO2
H9 H9
H11 H11
H12 H12
H13 H13
HN9 HN9