Atom Nomenclature for DX9

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 DX9

Atom Name (V3) Atom Name (V2)
C12 C12
C13 C13
C11 C11
C10 C10
C7 C7
C6 C6
C5 C5
C4 C4
C9 C9
C8 C8
C2 C2
N2 N2
N1 N1
C14 C14
C22 C22
O23 O23
O24 O24
C15 C15
N28 N28
C27 C27
C26 C26
C30 C30
C29 C29
C31 C31
N32 N32
C33 C33
C21 C21
C20 C20
C17 C17
C18 C18
C19 C19
O25 O25
C16 C16
H12 H12
H11 H11
H10 H10
H6 H6
H5 H5
H9 H9
H227 2H27
HN21 1HN2
HN12 2HN1
HN11 1HN1
H141 1H14
H142 2H14
HO4 HO4
H15 H15
H127 1H27
H130 1H30
H129 1H29
H229 2H29
HN31 1HN3
H230 2H30
H331 1H33
H332 2H33
H333 3H33
H21 H21
H20 H20
H17 H17
H18 H18
H26 H26