Atom Nomenclature for UI3

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 UI3

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
C3 C3
C4 C4
C5 C5
C6 C6
C9 C9
C10 C10
C11 C11
C12 C12
C16 C16
N17 N17
N18 N18
O19 O19
C20 C20
C24 C24
C25 C25
N26 N26
N27 N27
C28 C28
S34 S34
O35 O35
O36 O36
C37 C37
H1 H1
H2 H2
H9 H9
H10 H10
H12 H12
H17 H17
H181 1H18
H182 2H18
H201 1H20
H202 2H20
H203 3H20
H25 H25
H28 H28
H371 1H37
H372 2H37
H373 3H37