Atom Nomenclature for HPE

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 HPE

Atom Name (V3) Atom Name (V2)
N N
CA CA
C C
O O
CB CB
CG CG
CD CD
CE1 CE1
CE2 CE2
CZ1 CZ1
CZ2 CZ2
CH CH
OXT OXT
H 1HN
H2 2HN
HA HA
HB2 1HB
HB3 2HB
HG2 1HG
HG3 2HG
HE1 1HE
HE2 2HE
HZ1 1HZ
HZ2 2HZ
HH 1HH
HXT HXT