Atom Nomenclature for HHK

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 HHK

Atom Name (V3) Atom Name (V2)
N N
CA CA
CB CB
CG CG
CD CD
CE CE
CZ CZ
CT CT
NH NH
C C
O O
OXT OXT
H H
H2 HN2
HA HA
HB2 2HB
HB3 1HB
HG2 2HG
HG3 1HG
HD2 2HD
HD3 1HD
HE2 2HE
HE3 3HE
HZ2 2HZ
HZ3 1HZ
HT2 2HT
HT1 1HT
HH1 1HH
HH2 2HH
HXT HXT