Atom Nomenclature for UBC

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 UBC

Atom Name (V3) Atom Name (V2)
O1 O1
C10 C10
O2 O2
C22 C22
C23 C23
C24 C24
C25 C25
C26 C26
C21 C21
C17 C17
N6 N6
C5 C5
O8 O8
C1 C1
O7 O7
C2 C2
C3 C3
N4 N4
CB CB
CA CA
N N
C C
O O
OXT OXT
HO1 HO1
H23 H23
H24 H24
H25 H25
H26 H26
H171 1H17
H172 2H17
H2 H2
H3 H3
HB1 1HB
HB2 2HB
HA HA
HN1 1HN
HN2 2HN
HO HO