Atom Nomenclature for TDR

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 TDR

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
O2 O2
N3 N3
C4 C4
O4 O4
C5 C5
CM5 CM5
C6 C6
HN1 HN1
HN3 HN3
H5M1 1H5M
H5M2 2H5M
H5M3 3H5M
H6 H6