Atom Nomenclature for CG2

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 CG2

Atom Name (V3) Atom Name (V2)
N1G N1G
C2G C2G
N2G N2G
N3G N3G
C4G C4G
C5G C5G
C6G C6G
O6G O6G
N7G N7G
C8G C8G
N9G N9G
CA' CA*
CB' CB*
OB' OB*
CC' CC*
OC' OC*
CD' CD*
OD' OD*
CE' CE*
OE' OE*
P P
O1P O1P
O2P O2P
O5' O5*
C5' C5*
C4' C4*
O4' O4*
C3' C3*
O3' O3*
C2' C2*
O2' O2*
C1' C1*
N1U N1U
C2U C2U
O2U O2U
N3U N3U
C4U C4U
C5U C5U
C6U C6U
N4C N4C
HNG1 1HNG
H2G1 1H2G
H2G2 2H2G
H8G H8G
HC' HC'
HCA HCA
HO' HO'
HCB HCB
HOA HOA
HCC HCC
HC'1 1HC'
HC'2 2HC'
H2P H2P
HOB HOB
HCA1 1HCA
HCA2 2HCA
HCD HCD
HCE HCE
HOC HOC
HCG HCG
HCF HCF
H5U H5U
H6U H6U
H4C1 1H4C
H4C2 2H4C