Atom Nomenclature for FQK

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 FQK

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
C3 C3
C4 C4
C5 C5
C6 C6
C7 C7
C8 C8
C10 C9
C11 C10
C13 C11
C14 C12
O O1
C C13
N1 N1
N2 N2
N N3
N3 N4
C9 C14
N4 N5
N5 N6
C12 C15
C15 C16
H1 H1
H2 H2
H3 H3
H4 H4
H5 H5
H6 H6
H7 H7
H8 H8
H9 H9
H10 H10
H11 H11
H12 H12
H13 H13
H15 H15
H16 H16
H17 H17
H19 H19
C16 C17
C17 C18
C18 C19
C19 C20
H18 H18
H14 H14
H24 H24
H25 H25
H23 H23
H22 H22
H21 H21