Atom Nomenclature for FRL

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 FRL

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
C3 C3
C4 C4
C5 C5
C6 C6
CL7 CL7
C8 C8
N9 N9
C10 C10
C11 C11
O12 O12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
C18 C18
C19 C19
C20 C20
O21 O21
N22 N22
C23 C23
C24 C24
N25 N25
C26 C26
C27 C27
C28 C28
O29 O29
N30 N30
H1 H1
H2 H2
H4 H4
H5 H5
H13 H13
H14 H14
H15 H15
H171 1H17
H172 2H17
H181 1H18
H182 2H18
H19 H19
H20 H20
H21 H21
H231 1H23
H232 2H23
H233 3H23
H24 H24
H27 H27
H301 1H30
H302 2H30