Atom Nomenclature for SMM

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 SMM

Atom Name (V3) Atom Name (V2)
N N
CA CA
CB CB
CG CG
SD SD
CE CE
C5' C5*
C4' C4*
O4' O4*
C1' C1*
N9 N9
C4 C4
N3 N3
C2 C2
N1 N1
C6 C6
N6 N6
C5 C5
N7 N7
C8 C8
C2' C2*
O2' O2*
C3' C3*
O3' O3*
C C
O O
OXT OXT
CXT CXT
HN1 1HN
HN2 2HN
HA1 1HA
HB1 1HB
HB2 2HB
HG1 1HG
HG2 2HG
HD1 1HD
HE1 1HE
HE2 2HE
HE3 3HE
H5'1 1H5*
H5'2 2H5*
H4' H4*
H1' H1*
H2 H2
HN61 1HN6
HN62 2HN6
H8 H8
H2' H2*
HO2' *HO2
H3' H3*
HO3' *HO3
HXT1 1HXT
HXT2 2HXT
HXT3 3HXT