Atom Nomenclature for OIL

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 OIL

Atom Name (V3) Atom Name (V2)
C C
O O
O1 O1
CA CA
CB CB
CD1 CD1
CG1 CG1
CG2 CG2
OXT O3
HO1 HO1
HA HA
HB HB
HD1 HD1
HD1A HD1A
HD1B HD1B
HG1 HG1
HG1A HG1A
HG2 HG2
HG2A HG2A
HG2B HG2B
HXT H12