Atom Nomenclature for UIP

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 UIP

Atom Name (V3) Atom Name (V2)
N1 N1
C3 C3
N2 N2
C4 C4
C9 C9
C8 C8
C7 C7
C6 C6
C5 C5
C10 C10
N11 N11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
N19 N19
C20 C20
O21 O21
C22 C22
C23 C23
C24 C24
C32 C32
C31 C31
C30 C30
O29 O29
C28 C28
O27 O27
C26 C26
C25 C25
C18 C18
C42 C42
HN1 HN1
HN21 1HN2
HN22 2HN2
H9 H9
H8 H8
H6 H6
H5 H5
H10 H10
H121 1H12
H122 2H12
H131 1H13
H132 2H13
H141 1H14
H142 2H14
H15 H15
H16 H16
H17 H17
H22 H22
H231 1H23
H232 2H23
H32 H32
H31 H31
H281 1H28
H282 2H28
H25 H25
H181 1H18
H182 2H18
H421 1H42
H422 2H42
H423 3H42