Atom Nomenclature for USC

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 USC

Atom Name (V3) Atom Name (V2)
CAG CAG
OAI OAI
OAJ OAJ
OAO OAO
OAP OAP
CBG CBG
CBH CBH
CBI CBI
O2 NBR
O1 NBT
NBU NBU
CBX CBX
CBY CBY
CCF CCF
CCG CCG
CCH CCH
SCT SCT
HAG HAG
HAGA HAGA
HAGB HAGB
HBG HBG
HBH HBH
HBI HBI
HNBR HNBR
HNBT HNBT
HNBU HNBU