Atom Nomenclature for 178

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 178

Atom Name (V3) Atom Name (V2)
O O
C1 C1
C2 C2
C2A C2A
C2B C2B
C2G C2G
C3 C3
C4 C4
C5 C5
C6 C6
S S
O' O'
C1' C1'
C2' C2'
C2X C2X
C2Y C2Y
C2Z C2Z
C3' C3'
C4' C4'
C5' C5'
C6' C6'
HO HO
H2A H2A
H2B1 1H2B
H2B2 2H2B
H2B3 3H2B
H2G1 1H2G
H2G2 2H2G
H2G3 3H2G
H3 H3
H5 H5
H6 H6
HO' HO'
H2X H2X
H2Y1 1H2Y
H2Y2 2H2Y
H2Y3 3H2Y
H2Z1 1H2Z
H2Z2 2H2Z
H2Z3 3H2Z
H3' H3'
H5' H5'
H6' H6'