Atom Nomenclature for HIX

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 HIX

Atom Name (V3) Atom Name (V2)
N N
CA CA
C C
O O
CB CB
CG CG
CD2 CD2
ND1 ND1
NE1 NE1
NE2 NE2
H H
H2 H1
HA HA
HB1 HB1
HB2 HB2
HD2 HD2
HD1 HD1
OXT OXT
HXT HXT