Atom Nomenclature for A2Y

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 A2Y

Atom Name (V3) Atom Name (V2)
O O
S S
C1 C1
N1 N1
C2 C2
N2 N2
C3 C3
C4 C4
C5 C5
C9 C9
C10 C10
C11 C11
C12 C12
C61 C61
C62 C62
C63 C63
C71 C71
C72 C72
C73 C73
C81 C81
C82 C82
C83 C83
H44 H44
H1 H1
H2 H2
H3 H3
H15 H15
H25 H25
H161 H161
H261 H261
H362 H362
H462 H462
H563 H563
H663 H663
H171 H171
H272 H272
H373 H373
H181 H181
H281 H281
H382 H382
H482 H482
H583 H583
H683 H683
H1N2 H1N2
H2N2 H2N2