Atom Nomenclature for RED

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 RED

Atom Name (V3) Atom Name (V2)
C1 C1
O1 O1
OXT OXT
C2 C2
C3 C3
C4 C4
C5 C5
C6 C6
C7 C7
C8 C8
S8 S8
S6 S6
HO HO
H22 2H2
H21 1H2
H32 2H3
H31 1H3
H42 2H4
H41 1H4
H52 2H5
H51 1H5
H6 H6
H72 2H7
H71 1H7
H82 2H8
H81 1H8
H8S H8S
H6S H6S