Atom Nomenclature for CEO

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 CEO

Atom Name (V3) Atom Name (V2)
S1 S1
C2 C2
C3 C3
C3' C3'
C4 C4
C4' C4'
O4A O4A
O4B O4B
N5 N5
C6 C6
C7 C7
C8 C8
O9 O9
N10 N10
C11 C11
O12 O12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
S19 S19
HC21 1HC2
HC22 2HC2
H3'1 1H3'
H3'2 2H3'
H4A H4A
HC6 HC6
HC7 HC7
HC8 HC8
H10 H10
H131 1H13
H132 2H13
H15 H15
H16 H16
H17 H17