Atom Nomenclature for TAC

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 TAC

Atom Name (V3) Atom Name (V2)
C1 C1
O1 O1
C2 C2
C21 C21
O21 O21
N21 N21
C3 C3
O3 O3
C4 C4
N4 N4
C42 C42
C43 C43
C41 C41
C5 C5
C51 C51
C6 C6
C62 C62
O6 O6
C61 C61
C7 C7
C8 C8
C9 C9
C10 C10
O10 O10
C1A C1A
C11 C11
O11 O11
C1B C1B
C12 C12
O12 O12
C1C C1C
O1C O1C
HN21 1HN2
HN22 2HN2
HO3 HO3
H4 H4
H421 1H42
H422 2H42
H423 3H42
H431 1H43
H432 2H43
H433 3H43
H41 H41
H51A 1H5
H52 2H5
H51 H51
H621 1H62
H622 2H62
H623 3H62
HO6 HO6
H7 H7
H8 H8
H9 H9
HO1 HO1
HO2 HO2
HOC HOC