Atom Nomenclature for PEB

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 PEB

Atom Name (V3) Atom Name (V2)
CHC CHC
NC NC
C1C C1C
C2C C2C
C3C C3C
C4C C4C
CMC CMC
CAC CAC
CBC CBC
CGC CGC
O1C O1C
O2C O2C
ND ND
C1D C1D
C2D C2D
C3D C3D
C4D C4D
CMD CMD
CAD CAD
CBD CBD
OD OD
NA NA
C1A C1A
C2A C2A
C3A C3A
C4A C4A
CMA CMA
CBA CBA
OA OA
CHA CHA
CAA CAA
NB NB
C1B C1B
C2B C2B
C3B C3B
C4B C4B
CHB CHB
CMB CMB
CAB CAB
CBB CBB
CGB CGB
O1B O1B
O2B O2B
HHC1 1HHC
HHC2 2HHC
HNC HNC
HMC1 1HMC
HMC2 2HMC
HMC3 3HMC
HAC1 1HAC
HAC2 2HAC
HBC1 1HBC
HBC2 2HBC
HOC2 2HOC
HND HND
H1D1 1H1D
HMD1 1HMD
HMD2 2HMD
HMD3 3HMD
HAD1 1HAD
HBD1 1HBD
HBD2 2HBD
HNA HNA
H2A1 1H2A
H3A1 1H3A
HMA1 1HMA
HMA2 2HMA
HMA3 3HMA
HBA1 1HBA
HBA2 2HBA
HBA3 3HBA
HHA1 1HHA
HAA1 1HAA
HAA2 2HAA
HHB1 1HHB
HMB1 1HMB
HMB2 2HMB
HMB3 3HMB
HAB1 1HAB
HAB2 2HAB
HBB1 1HBB
HBB2 2HBB
HOB2 2HOB