Atom Nomenclature for HAO

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 HAO

Atom Name (V3) Atom Name (V2)
N N8
N9 N9
C10 C10
O11 O11
CA C12
C13 C13
C14 C14
C15 C15
O15 O15
C17 C17
C18 C18
C19 C19
N20 N20
C21 C21
O22 O22
C C23
O O24
H HN8
H13 H13
H15 H15
H15A H15A
H15B H15B
H17 H17
H18 H18
HN20 HN20
OXT O5
H2 H9
H10 H10
HXT H11