Atom Nomenclature for SWG

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 SWG

Atom Name (V3) Atom Name (V2)
CD2 CD2
CE3 CE3
CZ3 CZ3
CH2 CH2
CZ2 CZ2
CE2 CE2
NE1 NE1
CD1 CD1
CG CG
CB2 CB2
CA2 CA2
N2 N2
C2 C2
O2 O2
N3 N3
CA3 CA3
C3 C3
O3 O3
OXT OXT
C1 C1
CA1 CA1
N1 N1
CB1 CB1
OG1 OG1
HE3 HE3
HZ3 HZ3
HH2 HH2
HZ2 HZ2
HE1 HE1
HD1 HD1
HB2 HB2
HA31 HA31
HA32 HA32
HXT HXT
HA1 HA1
H H11N
H2 H12N
HB11 HB11
HB12 HB12
HG1 HG1