Atom Nomenclature for PTR

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 PTR

Atom Name (V3) Atom Name (V2)
N N
CA CA
C C
O O
OXT OXT
CB CB
CG CG
CD1 CD1
CD2 CD2
CE1 CE1
CE2 CE2
CZ CZ
OH OH
P P
O1P O1P
O2P O2P
O3P O3P
H H
H2 HN2
HA HA
HXT HXT
HB2 HB2
HB3 HB3
HD1 HD1
HD2 HD2
HE1 HE1
HE2 HE2
HO2P HO2P
HO3P HO3P