Atom Nomenclature for IBM

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 IBM

Atom Name (V3) Atom Name (V2)
N9 N9
C8 C8
N7 N7
C5 C5
C4 C4
N3 N3
C2 C2
N1 N1
C6 C6
O6 O6
O2 O2
C10 C10
C11 C11
C12 C12
C13 C13
C14 C14
HN9 HN9
H8 H8
H101 1H10
H102 2H10
H103 3H10
H111 1H11
H112 2H11
H12 H12
H131 1H13
H132 2H13
H133 3H13
H141 1H14
H142 2H14
H143 3H14