Atom Nomenclature for ILO

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 ILO

Atom Name (V3) Atom Name (V2)
N N
CA CA
CB CB
CG CG
CD CD
NE NE
CZ CZ
CH1 CH1
NH2 NH2
C C
OA1 OA1
OA2 OA2
HN1 1HN
HN2A 2HN
HCA HCA
HCB1 1HCB
HCB2 2HCB
HCG1 1HCG
HCG2 2HCG
HCD1 1HCD
HCD2 2HCD
HNE HNE
HC11 1HC1
HC12 2HC1
HC13 3HC1
HN2 HN2
HO2 HO2