Atom Nomenclature for MRG

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 MRG

Atom Name (V3) Atom Name (V2)
P P
OP1 O1P
OP2 O2P
O5' O5*
N9 N9
C4 C4
N3 N3
C2 C2
N1 N1
C6 C6
O6 O6
C5 C5
N7 N7
C8 C8
N2 N2
C21 C21
C22 C22
C23 C23
S24 S24
C2' C2*
C5' C5*
C4' C4*
O4' O4*
C1' C1*
C3' C3*
O3' O3*
OP3 O3P
HOP2 2HOP
H1 H1
H8 H8
H21 1H2
H211 1H21
H212 2H21
H221 1H22
H222 2H22
H231 1H23
H232 2H23
H24 H24
H2' 1H2*
H2'' 2H2*
H5' 1H5*
H5'' 2H5*
H4' H4*
H1' H1*
H3' H3*
HO3' H3T
HOP3 3HOP