Atom Nomenclature for NPK

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 NPK

Atom Name (V3) Atom Name (V2)
N1 N1
S1 S1
C2 C2
N2 N2
C3 C3
O3 O3
C4 C4
C5 C5
C6 C6
C7 C7
C8 C8
C9 C9
C10 C10
C11 C11
O11 O11
O12 O12
C30 C30
O31 O31
O32 O32
C33 C33
C34 C34
C35 C35
C36 C36
C37 C37
C38 C38
C39 C39
C40 C40
N40 N40
O44 O44
C45 C45
O46 O46
O54 O54
O55 O55
H2 H2
HN2 HN2
H4 H4
H5 H5
H6 H6
H6A H6A
H7 H7
H7A H7A
H8 H8
H8A H8A
H9 H9
H9A H9A
H10 H10
H10A H10A
HO12 HO12
H33 H33
H34 H34
H34A H34A
H34B H34B
H36 H36
H39 H39
H45 H45
H45A H45A