Atom Nomenclature for FIT

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 FIT

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
N2 N2
C4 C4
C5 C5
C6 C6
O1 O1
O2 O2
C1 C1
C3 C3
C7 C7
C8 C8
C9 C9
C10 C10
C11 C11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
C18 C18
C19 C19
C20 C20
C21 C21
C22 C22
C23 C23
HN1 HN1
H2 H2
HN2 HN2
H4 H4
H5 H5
H5A H5A
H6 H6
H6A H6A
H1 H1
H7 H7
H8 H8
H10 H10
H10A H10A
H11 H11
H11A H11A
H13 H13
H14 H14
H14A H14A
H15 H15
H15A H15A
H16 H16
H17 H17
H17A H17A
H17B H17B
H18 H18
H18A H18A
H18B H18B
H21 H21
H21A H21A
H21B H21B
H22 H22
H22A H22A
H22B H22B
H23 H23
H23A H23A
H23B H23B