Atom Nomenclature for PHD

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 PHD

Atom Name (V3) Atom Name (V2)
N N
CA CA
C C
O O
CB CB
CG CG
OD1 OD1
OD2 OD2
P P
OP1 OP1
OP2 OP2
OP3 OP3
OXT OXT
H2 2H
H 1H
HA HA
HB2 2HB
HB3 1HB
H2O H2O
H3O H3O
HXT HO