Atom Nomenclature for CT9

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 CT9

Atom Name (V3) Atom Name (V2)
N8 N8
C61 C61
S1 S1
N6 N6
C62 C62
O2 O2
C4 C4
C5 C5
C6 C6
C3 C3
C2 C2
C1 C1
N7 N7
C7 C7
C8 C8
N1 N1
C10 C10
C11 C11
C20 C20
C21 C21
C22 C22
C12 C12
N2 N2
N3 N3
C9 C9
N5 N5
C13 C13
C18 C18
C17 C17
C14 C14
C15 C15
C16 C16
O3 O3
HN81 1HN8
HN82 2HN8
H611 1H61
H612 2H61
H613 3H61
H621 1H62
H622 2H62
H623 3H62
H4 H4
H51 1H5
H52 2H5
H61 1H6
H62 2H6
H31 1H3
H32 2H3
H21 1H2
H22 2H2
H1 H1
HN7 HN7
H8 H8
H20 H20
H211 1H21
H212 2H21
H213 3H21
H221 1H22
H222 2H22
H223 3H22
H12 H12
HN5 HN5
H18 H18
H17 H17
H14 H14
H15 H15