Atom Nomenclature for NCT

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 NCT

Atom Name (V3) Atom Name (V2)
N1 N1
C1 C1
C2 C2
C3 C3
C4 C4
C5 C5
N2 N2
C6 C6
C7 C7
C8 C8
C9 C9
C10 C10
HC1 HC1
HC3 HC3
HC4 HC4
HC5 HC5
HC6 HC6
HC71 1HC7
HC72 2HC7
HC81 1HC8
HC82 2HC8
HC91 1HC9
HC92 2HC9
H101 1H10
H102 2H10
H103 3H10