Atom Nomenclature for FDD

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 FDD

Atom Name (V3) Atom Name (V2)
O2D O2D
CGD CGD
O1D O1D
CBD CBD
CAD CAD
C3D C3D
C2D C2D
CMD CMD
C4D C4D
CHA CHA
ND N D
C1D C1D
CHD CHD
C4C C4C
C3C C3C
CMF CMF
C2C C2C
CMC CMC
FE FE
NA N A
C1A C1A
NC N C
C1C C1C
CHC CHC
C4B C4B
C3B C3B
CME CME
C2B C2B
CMB CMB
NB N B
C1B C1B
CHB CHB
C4A C4A
C3A C3A
CMA CMA
C2A C2A
CAA CAA
CBA CBA
CGA CGA
O1A O1A
O2A O2A
H1D H1D
HBD1 1HBD
HBD2 2HBD
HAD1 1HAD
HAD2 2HAD
HMD1 1HMD
HMD2 2HMD
HMD3 3HMD
HHA HHA
HHD HHD
HMF1 1HMF
HMF2 2HMF
HMF3 3HMF
HMC1 1HMC
HMC2 2HMC
HMC3 3HMC
HHC HHC
HME1 1HME
HME2 2HME
HME3 3HME
HMB1 1HMB
HMB2 2HMB
HMB3 3HMB
HHB HHB
HMA1 1HMA
HMA2 2HMA
HMA3 3HMA
HAA1 1HAA
HAA2 2HAA
HBA1 1HBA
HBA2 2HBA
H1A H1A