Atom Nomenclature for IGL

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 IGL

Atom Name (V3) Atom Name (V2)
N N
CA CA
C C
O O
OXT OXT
CB CB
CG1 CG1
CG2 CG2
CD1 CD1
CE1 CE1
CH1 CH1
CH2 CH2
CE2 CE2
CD2 CD2
H 1HN
H2 2HN
HA HA
HXT HXT
HB HB
HG12 1HG1
HG13 2HG1
HG22 1HG2
HG23 2HG2
HE1 HE1
HH1 HH1
HH2 HH2
HE2 HE2