Atom Nomenclature for NI7

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 NI7

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
N3 N3
C5 C5
C6 C6
C7 C7
C8 C8
O9 O9
C10 C10
C11 C11
C12 C12
C13 C13
O14 O14
C15 C15
O16 O16
N17 N17
C18 C18
C19 C19
C20 C20
C21 C21
O22 O22
C23 C23
C24 C24
C25 C25
C26 C26
N27 N27
C28 C28
H1 H1
H2 H2
H5 H5
H5A H5A
H7 H7
HO9 HO9
H10 H10
H11 H11
H12 H12
H18 H18
H18A H18A
H20 H20
HO22 HO22
H23 H23
H24 H24
H25 H25
H26 H26
H26A H26A
HN27 HN27
H28 H28
H28A H28A