Atom Nomenclature for AP6

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 AP6

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
N2 N2
N3 N3
C4 C4
N4 N4
C9 C9
C10 C10
N5 N5
C6 C6
C7 C7
N8 N8
C11 C11
C12 C12
C16 C16
C13 C13
C15 C15
C14 C14
HN21 1HN2
HN22 2HN2
HN41 1HN4
HN42 2HN4
HN5 HN5
H6 H6
H71 1H7
H72 2H7
HN8 HN8
H12 H12
H16 H16
H13 H13
H15 H15
H14 H14