Atom Nomenclature for PYD

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 PYD

Atom Name (V3) Atom Name (V2)
N1' N1'
C2' C2'
CM2 CM2
N3' N3'
C4' C4'
N4' N4'
C5' C5'
C6' C6'
C7' C7'
HM21 1HM2
HM22 2HM2
HM23 3HM2
HN41 1HN4
HN42 2HN4
HC6' HC6'
HC71 1HC7
HC72 2HC7
HC73 3HC7