Atom Nomenclature for EBT

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 EBT

Atom Name (V3) Atom Name (V2)
C C
N N
O O
CA CA
CB CB
CG CG
OAA OAA
OAB OAB
NAF NAF
CAJ CAJ
CAK CAK
CAL CAL
CAM CAM
CAP CAP
CAR CAR
CAS CAS
CAT CAT
CAU CAU
CAV CAV
CD1 CD1
CD2 CD2
OXT OXT
HN HN
HA HA
HB HB
HBA HBA
HG HG
HOAA HOAA
HNAF HNAF
HNAA HNAA
HAJ HAJ
HAK HAK
HAL HAL
HALA HALA
HAR HAR
HAS HAS
HAT HAT
HAU HAU
HAV HAV
HD1 HD1
HD1A HD1A
HD1B HD1B
HD2 HD2
HD2A HD2A
HD2B HD2B
HOXT HOXT