Atom Nomenclature for 2ML

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 2ML

Atom Name (V3) Atom Name (V2)
N N
CA CA
CB1 CB1
CB2 CB2
CG CG
CD1 CD1
CD2 CD2
C C
O O
OXT OXT
H2 HN2
H H
HB11 1HB1
HB12 2HB1
HB21 1HB2
HB22 2HB2
HB23 3HB2
HG HG
HD11 1HD1
HD12 2HD1
HD13 3HD1
HD21 1HD2
HD22 2HD2
HD23 3HD2
HXT HXT