Atom Nomenclature for DOI

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 DOI

Atom Name (V3) Atom Name (V2)
PA PA
O1A O1A
O2A O2A
O3A O3A
O5' O5*
P6 P6
O16 O16
O26 O26
O36 O36
C5' C5*
C4' C4*
O4' O4*
C1' C1*
N9 N9
C4 C4
N3 N3
C2 C2
N1 N1
C6 C6
O6 O6
C5 C5
N7 N7
C8 C8
C2' C2*
C3' C3*
O3' O3*
H2A H2A
H3A H3A
H26 H26
H36 H36
H5'1 1H5*
H5'2 2H5*
H4' H4*
H1' H1*
H2 H2
H8 H8
H2'1 1H2*
H2'2 2H2*
H3' H3*
HO3' *HO3