Atom Nomenclature for BTD

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 BTD

Atom Name (V3) Atom Name (V2)
O5' O5*
C5' C5*
C4' C4*
O4' O4*
C1' C1*
N1 N1
C6 C6
C2 C2
O2 O2
N3 N3
C4 C4
O4 O4
C5 C5
C55 C55
C44 C44
C33 C33
C22 C22
S11 S11
BR BR
C2' C2*
C3' C3*
O3' O3*
HO5' *HO5
H5'1 1H5*
H5'2 2H5*
H4' H4*
H1' H1*
H6 H6
HN3 HN3
H44 H44
H33 H33
H2'1 1H2*
H2'2 2H2*
H3' H3*
HO3' *HO3