Atom Nomenclature for VRA

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 VRA

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
C3 C3
C4 C4
C5 C5
C6 C6
N7 N7
C8 C8
C9 C9
C10 C10
C11 C11
C12 C12
C13 C13
I14 I14
F15 F15
F16 F16
F17 F17
N18 N18
S19 S19
O20 O20
O21 O21
C22 C22
C23 C23
C24 C24
C25 C25
C26 C26
C27 C27
O28 O28
O29 O29
O30 O30
C31 C31
H3 H3
H4 H4
H6 H6
HN7 HN7
H11 H11
HN18 HN18
H23 H23
H23A H23A
H24 H24
H24A H24A
H25 H25
H25A H25A
H26 H26
H27 H27
H27A H27A
HO28 HO28
HO29 HO29
H31 H31
H31A H31A
H31B H31B