Atom Nomenclature for F77

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 F77

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
C3 C3
C4 C4
C5 C5
C6 C6
C7 C7
C8 C8
C9 C9
C10 C10
O11 O11
O12 O12
N13 N13
S14 S14
O15 O15
O16 O16
C17 C17
C18 C18
C19 C19
C20 C20
C21 C21
C22 C22
F23 F23
H11 1H1
H12 2H1
H13 3H1
H21A 1H2
H22A 2H2
H4 H4
H5 H5
H91 1H9
H92 2H9
H93 3H9
HO12 HO12
HN13 HN13
H18 H18
H19 H19
H21 H21
H22 H22