Atom Nomenclature for EDN

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 EDN

Atom Name (V3) Atom Name (V2)
NAA NAA
CAB CAB
CAC CAC
NAD NAD
HAA1 HAA1
HAA2 HAA2
HAB1 HAB1
HAB2 HAB2
HAC1 HAC1
HAC2 HAC2
HAD1 HAD1
HAD2 HAD2