Atom Nomenclature for PPB

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 PPB

Atom Name (V3) Atom Name (V2)
C3 C3
C4 C4
N1 N1
B1 B1
C2 C2
O2 O2
O1 O1
N5 N5
C7 C7
C8 C8
O3 O3
C9 C9
C10 C10
C11 C11
C12 C12
O4 O4
C14 C14
C16 C16
C23 C23
C24 C24
C25 C25
C5 C5
C6 C6
N2 N2
C13 C13
N6 N6
C17 C17
C18 C18
C19 C19
C20 C20
C21 C21
C22 C22
H31 1H3
H32 2H3
HN1 HN1
H2 H2
HO2 HO2
HO1 HO1
H7 H7
H91 1H9
H92 2H9
H101 1H10
H102 2H10
H111 1H11
H112 2H11
H14 H14
H16 H16
H24 H24
H25 H25
H5 H5
H131 1H13
H132 2H13
HN61 1HN6
HN62 2HN6
H17 H17
H18 H18
H19 H19
H20 H20
H22 H22