Atom Nomenclature for GA2

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 GA2

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
C4 C4
C8 C8
C4' C4*
O4' O4*
C3' C3*
O3' O3*
C2' C2*
O1' O1*
C1' C1*
N9 N9
N3 N3
N2 N2
C6 C6
O6 O6
C5 C5
N7 N7
HN1 HN1
H8 H8
H4'1 1H4*
H4'2 2H4*
HO4' *HO4
H3'1 1H3*
H3'2 2H3*
HO3' *HO3
H2' H2*
H1'1 1H1*
H1'2 2H1*
HN21 1HN2
HN22 2HN2