Atom Nomenclature for ISS

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 ISS

Atom Name (V3) Atom Name (V2)
CAG CAG
OAH OAH
CAI CAI
CAJ CAJ
NAK NAK
CAL CAL
CAM CAM
OAN OAN
CAO CAO
CAP CAP
OAQ OAQ
HAG HAG
HAI HAI
HAJ HAJ
HNAK HNAK
HAL HAL
HALA HALA
HAO HAO
HAOA HAOA
HAP HAP
HAPA HAPA
HOAQ HOAQ