Atom Nomenclature for TNL

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 TNL

Atom Name (V3) Atom Name (V2)
C1 C1
C7 C7
C2 C2
N2 N2
O21 O21
O22 O22
C3 C3
C4 C4
N4 N4
O41 O41
O42 O42
C5 C5
C6 C6
N6 N6
O61 O61
O62 O62
H7C1 1H7C
H7C2 2H7C
H7C3 3H7C
H3 H3
H5 H5