Atom Nomenclature for IM2

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 IM2

Atom Name (V3) Atom Name (V2)
C7 C7
C2 C2
C6 C6
C5 C5
C3 C3
O7 O7
C61 C61
O62 O62
C62 C62
N4 N4
C31 C31
O31 O31
O32 O32
S21 S21
C22 C22
C23 C23
N24 N24
C25 C25
N26 N26
C1 C1
H71 H71
H61A H61A
H51 H51
H61 H61
HO6 HO6
H621 H621
H622 H622
H623 H623
H41 H41
H321 H321
H221 H221
H222 H222
H231 H231
H232 H232
H241 H241
H25 H25
H26 H26
H11 H11
H12 H12