Atom Nomenclature for NNR

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 NNR

Atom Name (V3) Atom Name (V2)
O2R O2R
C2R C2R
C3R C3R
O3R O3R
C4R C4R
C5R C5R
O5R O5R
O4R O4R
C1R C1R
N1 N1
C2 C2
C6 C6
C5 C5
C4 C4
C3 C3
C7 C7
O7 O7
N7 N7
HO2R HO2R
H2R H2R
H3R H3R
HO3R HO3R
H4R H4R
H5R1 1H5R
H5R2 2H5R
HO5R HO5R
H1R H1R
H2 H2
H6 H6
H5 H5
H4 H4
HN71 1HN7
HN72 2HN7