Atom Nomenclature for CT1

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 CT1

Atom Name (V3) Atom Name (V2)
C1 C1
C2 C2
C3 C3
C4 C4
O7 O7
N8 N8
C9 C9
O10 O10
O11 O11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
C18 C18
C19 C19
C20 C20
C21 C21
C22 C22
C6 C6
C5 C5
H11 1H1
H12A 2H1
H13 3H1
H21 1H2
H22 2H2
H31 1H3
H32 2H3
H41 1H4
H42 2H4
HN8 HN8
H12 H12
H131 1H13
H132 2H13
H15 H15
H16 H16
H17 H17
H18 H18
H19 H19
H20 H20
H211 1H21
H212 2H21
H213 3H21
H221 1H22
H222 2H22
H223 3H22
H6 H6
H5 H5