Atom Nomenclature for BX3

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 BX3

Atom Name (V3) Atom Name (V2)
N1 N1
C2 C2
N3 N3
C4 C4
C5 C5
C6 C6
C7 C7
C8 C8
C9 C9
C10 C10
C11 C11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
C18 C18
C19 C19
C20 C20
C21 C21
C22 C22
O23 O23
O24 O24
O25 O25
C26 C26
C27 C27
N28 N28
C29 C29
C30 C30
C31 C31
N32 N32
C33 C33
C34 C34
HN1 HN1
HN31 1HN3
HN32 2HN3
H5 H5
H6 H6
H9 H9
H10 H10
H11 H11
H12 H12
H141 1H14
H142 2H14
H15 H15
H17 H17
H18 H18
H20 H20
H21 H21
HO4 HO4
H26 H26
H271 1H27
H272 2H27
H291 1H29
H292 2H29
H301 1H30
H302 2H30
HN3 HN3
H331 1H33
H332 2H33
H333 3H33
H341 1H34
H342 2H34