Atom Nomenclature for ICP

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 ICP

Atom Name (V3) Atom Name (V2)
N1A N1A
C2A C2A
CM2 CM2
N3A N3A
C4A C4A
N4A N4A
C5A C5A
C6A C6A
C7A C7A
HM21 1HM2
HM22 2HM2
HM23 3HM2
HN4 HN4
H6A1 1H6A
H7A1 1H7A
H7A2 2H7A