Atom Nomenclature for TTX

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 TTX

Atom Name (V3) Atom Name (V2)
C7 C7
N1 N1
C15 C15
C16 C16
C17 C17
C22 C22
C21 C21
C20 C20
C19 C19
C18 C18
C6 C6
O1 O1
C5 C5
C4 C4
C2 C2
C1 C1
C3 C3
N2 N2
C8 C8
O2 O2
C9 C9
C10 C10
N3 N3
C11 C11
C12 C12
O3 O3
C13 C13
N4 N4
C14 C14
O4 O4
H71 1H7
H72 2H7
H73 3H7
H161 1H16
H221 1H22
H211 1H21
H201 1H20
H191 1H19
H181 1H18
H51 1H5
H41 1H4
H42 2H4
H21 1H2
H11 1H1
H12 2H1
H13 3H1
H31 1H3
H32 2H3
H33 3H3
HN21 1HN2
H91 1H9
H101 1H10
H102 2H10
H103 3H10
H111 1H11
H112 2H11
H113 3H11
H131 1H13
H132 2H13
HN41 1HN4