Atom Nomenclature for OIS

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 OIS

Atom Name (V3) Atom Name (V2)
N6 N6
N1 N1
C2 C2
N2 N2
N3 N3
C4 C4
N4 N4
C5 C5
C6 C6
O1 O1
O2 O2
O3 O3
O4 O4
C1 C1
C3 C3
C7 C7
C8 C8
S1 S1
C11 C11
C12 C12
C13 C13
C14 C14
C15 C15
C16 C16
C17 C17
C18 C18
C19 C19
C20 C20
C21 C21
C22 C22
C23 C23
N5 N5
O5 O5
C31 C31
C32 C32
C34 C34
C35 C35
C36 C36
C37 C37
C38 C38
C40 C40
C10 C10
C24 C24
C9 C9
C28 C28
S2 S2
O7 O7
C25 C25
H1 H1
H2 H2
H41 1H4
H42 2H4
H51 1H5
H52 2H5
H4 H4
H6 H6
HO1 HO1
H3 H3
H7 H7
H81 1H8
H82 2H8
H12 H12
H13 H13
H14 H14
H15 H15
H16 H16
H171 1H17
H172 2H17
H173 3H17
H181 1H18
H182 2H18
H183 3H18
H19 H19
H21 H21
H221 1H22
H222 2H22
H223 3H22
H231 1H23
H232 2H23
H233 3H23
H5 H5
H31 H31
H32 H32
H34 H34
H36 H36
H37 H37
H402 2H40
H101 1H10
H102 2H10
H9 H9
HO7 HO7
H251 1H25
H252 2H25
H253 3H25