Atom Nomenclature for CAZ

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 CAZ

Atom Name (V3) Atom Name (V2)
S1 S1
C2 C2
C3 C3
C3' C3'
C4 C4
C4' C4'
O4A O4A
O4B O4B
N5 N5
C6 C6
C7 C7
C8 C8
O9 O9
N10 N10
C11 C11
O12 O12
C13 C13
N16 N16
O17 O17
C18 C18
C14 C14
C15 C15
S16 S16
C17 C17
N18 N18
N19 N19
C19 C19
C20 C20
C21 C21
O2A O2A
O2B O2B
HC21 1HC2
HC22 2HC2
HC31 1HC3
HC32 2HC3
H4AO OH4A
HC6 HC6
HC7 HC7
HC8 HC8
H10N NH10
H15C CH15
H181 1H18
H182 2H18
H191 1H19
H192 2H19
H193 3H19
H201 1H20
H202 2H20
H203 3H20
H2AO OH2A