Atom Nomenclature for XFM

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 XFM

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
C3 C3
C4 C4
C5 C5
C6 C6
C7 C7
C8 C8
C9 C9
N10 N10
C11 C11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
C18 C18
C19 C19
N20 N20
C21 C21
C22 C22
N23 N23
C24 C24
C25 C25
N26 N26
H3 H3
H5 H5
H7 H7
H7A H7A
H8 H8
H8A H8A
H12 H12
H13 H13
H14 H14
H15 H15
H15A H15A
H16 H16
H16A H16A
H18 H18
H22 H22
HN23 HN23
HN2A HN2A
H24 H24
H24A H24A
H24B H24B
H25 H25
H25A H25A
H25B H25B
HN26 HN26
HN2B HN2B