Atom Nomenclature for PQQ

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 PQQ

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
C2X C2X
O2A O2A
O2B O2B
C3 C3
C3A C3A
C1A C1A
C4 C4
O4 O4
C5 C5
O5 O5
C6A C6A
N6 N6
C7 C7
C7X C7X
O7A O7A
O7B O7B
C8 C8
C9 C9
C9X C9X
O9A O9A
O9B O9B
C9A C9A
HN1 HN1
HOB2 2HOB
H3 H3
HOB7 7HOB
H8 H8
HOB9 9HOB