Atom Nomenclature for M2G

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 M2G

Atom Name (V3) Atom Name (V2)
P P
OP1 O1P
OP2 O2P
OP3 O3P
O5' O5*
C5' C5*
C4' C4*
O4' O4*
C3' C3*
O3' O3*
C2' C2*
O2' O2*
C1' C1*
N9 N9
C8 C8
N7 N7
C5 C5
C6 C6
O6 O6
N1 N1
C2 C2
N2 N2
N3 N3
C4 C4
CM1 CM1
CM2 CM2
HOP2 2HOP
HOP3 3HOP
H5' 1H5*
H5'' 2H5*
H4' H4*
H3' H3*
HO3' *HO3
H2' H2*
HO2' *HO2
H1' H1*
H8 H8
HN1 HN1
HM11 1HM1
HM12 2HM1
HM13 3HM1
HM21 1HM2
HM22 2HM2
HM23 3HM2