Atom Nomenclature for CK8

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 CK8

Atom Name (V3) Atom Name (V2)
C6 C6
N1 N1
C2 C2
N3 N3
C4 C4
C5 C5
C5A C5A
C1A C1A
N2A N2A
C3A C3A
S4A S4A
C6A C6A
C7A C7A
N7 N7
C1B C1B
C2B C2B
C3B C3B
C4B C4B
C5B C5B
C6B C6B
N7B N7B
C8B C8B
C9B C9B
H6 H6
H5 H5
H6A1 1H6A
H6A2 2H6A
H6A3 3H6A
H7A1 1H7A
H7A2 2H7A
H7A3 3H7A
HN7 HN7
H2B H2B
H3B H3B
H5B H5B
H6B H6B
H8B1 1H8B
H8B2 2H8B
H8B3 3H8B
H9B1 1H9B
H9B2 2H9B
H9B3 3H9B