Atom Nomenclature for AL3

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 AL3

Atom Name (V3) Atom Name (V2)
C3 C3
O5 O5
C9 C9
C10 C10
C11 C11
C12 C12
C13 C13
C14 C14
C15 C15
O1A O1A
O2A O2A
N21 N21
S1 S1
C4 C4
C5 C5
C6 C6
S2 S2
S7 S7
O3B O3B
O4B O4B
N8 N8
S16 S16
HO5 HO5
H91 1H9
H92 2H9
H10 H10
H111 1H11
H112 2H11
H13 H13
H14 H14
H15 H15
HNL1 1HNL
HNL2 2HNL
H4 H4