Atom Nomenclature for 2DD

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 2DD

Atom Name (V3) Atom Name (V2)
CL1 CL1
C1 C1
C2 C2
C3 C3
C4 C4
O4 O4
O2 O2
C6 C6
C5 C5
C7 C7
N2 N2
N1 N1
C9 C9
C8 C8
C10 C10
O5 O5
N3 N3
C17 C17
C11 C11
C12 C12
C13 C13
C16 C16
C15 C15
C14 C14
S1 S1
O6 O6
O7 O7
N4 N4
H3 H3
H4 H4
H2 H2
H6 H6
HA HA
H9 H9
HB HB
H171 1H17
H172 2H17
H12 H12
H13 H13
H16 H16
H15 H15
H4N1 1H4N
H4N2 2H4N