Atom Nomenclature for CCK

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 CCK

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
C3 C3
N4 N4
C5 C5
C6 C6
N13 N13
N15 N15
C17 C17
C18 C18
C19 C19
N20 N20
C26 C26
C27 C27
C28 C28
C29 C29
C35 C35
C36 C36
C37 C37
C38 C38
N44 N44
C46 C46
C48 C48
C51 C51
C57 C57
C59 C59
O61 O61
O63 O63
H2 H2
H6 H6
H19 H19
H26 H26
H28 H28
H29 H29
H35 H35
H36 H36
H38 H38
HN44 HN44
H46 H46
H48 H48
H48A H48A
H48B H48B
H51 H51
H51A H51A
H51B H51B
H57 H57
H57A H57A
HO63 HO63