Atom Nomenclature for RDF

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 RDF

Atom Name (V3) Atom Name (V2)
C1 C1
O1 O1
C2 C2
O2 O2
C3 C3
O3 O3
C4 C4
O4 O4
C5 C5
O5 O5
C6 C6
P P1
O1P O6
O2P O7
N N1
CA C7
C C8
O O9
CB C9
CG C10
CD1 C11
CD2 C12
N1 N2
CA1 C13
C7 C14
O6 O11
CB1 C15
CG1 C16
CD11 C17
CD21 C18
NE1 N3
CE2 C19
CE3 C20
CZ2 C21
CZ3 C22
CH2 C23
OXT O12
H1 H1
H2 H2
HO2 H3
H3 H4
HO3 H5
H4 H6
HO4 H7
H5 H8
H61 H9
H62 H10
H63 H11
HOP2 H12
H H14
HA H16
HB2 H17
HB3 H18
HG H19
HD11 H20
HD12 H21
HD13 H22
HD21 H23
HD22 H24
HD23 H25
H6 H27
HA1 H29
HB21 H30
HB31 H31
HD1 H32
HE1 H33
HE3 H34
HZ2 H35
HZ3 H36
HH2 H37
HXT H38