Atom Nomenclature for GAX

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 GAX

Atom Name (V3) Atom Name (V2)
N6 N6
N1 N1
C2 C2
N2 N2
N3 N3
C4 C4
N4 N4
C5 C5
C6 C6
O1 O1
O2 O2
O3 O3
C7 C7
C8 C8
C10 C10
C9 C9
S2 S2
C3 C3
C1 C1
S1 S1
C14 C14
C13 C13
N5 N5
C12 C12
C11 C11
C15 C15
C19 C19
C18 C18
C17 C17
C16 C16
H2 H2
H10 H10
H9 H9
H1 H1
H3 H3
H5 H5
H6 H6
H1A H1A
H141 H141
H142 H142
H131 H131
H132 H132
H121 H121
H122 H122
H111 H111
H112 H112
H19 H19
H18 H18
H17 H17
H16 H16