Atom Nomenclature for RIA

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 RIA

Atom Name (V3) Atom Name (V2)
P P
OP1 O1P
OP2 O2P
OP3 O3P
O5A O5*
C5A C5*
C4A C4*
O4' O4*
C3A C3*
O3A O3*
C2A C2*
O2A O2*
C1A C1*
N9 N9
C8 C8
N7 N7
C5 C5
C6 C6
N6 N6
N1 N1
C2 C2
N3 N3
C4 C4
C1' C1'
O1' O1'
C2' C2'
O2' O2'
C3' C3'
O3' O3'
C4' C4'
C5' C5'
O5' O5'
P' P'
O1X O1P'
O2X O2P'
O3X O3P'
HOP2 2HOP
HOP3 3HOP
H5' 1H5*
H5'' 2H5*
H4A H4*
H3A H3*
HO3A *HO3
H2A H2*
H1A H1*
H8 H8
HN61 1HN6
HN62 2HN6
H2 H2
H1' H1'
H2' H2'
HO2' 'HO2
H3' H3'
HO3' 'HO3
H4' H4'
H5'1 1H5'
H5'2 2H5'
HO'2 2HO'
HO'3 3HO'