Atom Nomenclature for PXB

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 PXB

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
C4 C4
O6 O6
N8 N8
S12 S12
O14 O14
O16 O16
C18 C18
C20 C20
C21 C21
C22 C22
C23 C23
C24 C24
C31 C31
C33 C33
C35 C35
O37 O37
N39 N39
C42 C42
C44 C44
C45 C45
C46 C46
C47 C47
C48 C48
C55 C55
H1 H1
H1A H1A
H1B H1B
H2 H2
H2A H2A
HN8 HN8
H20 H20
H21 H21
H23 H23
H24 H24
H44 H44
H45 H45
H46 H46
H47 H47
H48 H48
H55 H55
H55A H55A
H55B H55B