Atom Nomenclature for C2G

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 C2G

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
N3 N3
C4 C4
C5 C5
C6 C6
O2 O2
N4 N4
C1' C1*
C2' C2*
O2' O2*
C3' C3*
C4' C4*
O4' O4*
O3' O3*
C5' C5*
O5' O5*
PA PA
O1A O1A
O2A O2A
O3A O3A
PB PB
O1B O1B
O2B O2B
O3B O3B
O1G O1G
C1G C1G
C2G C2G
O2G O2G
C3G C3G
HC5 HC5
HC6 HC6
HN41 1HN4
HN42 2HN4
HC1 HC1
HC2 HC2
HO2 HO2
HC3 HC3
HC4 HC4
HO3 HO3
HC51 1HC5
HC52 2HC5
H2A H2A
H2B H2B
H1G H1G
H1G1 1H1G
H1G2 2H1G
H2G H2G
HOG HOG
H3G1 1H3G
H3G2 2H3G