Milović NM, Badjić JD, Kostić NM. Conjugate of Palladium(II) Complex and β-Cyclodextrin Acts as a Biomimetic Peptidase.
J Am Chem Soc 2003;
126:696-7. [PMID:
14733526 DOI:
10.1021/ja038404p]
[Citation(s) in RCA: 65] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We combined the newly discovered ability of [Pd(H2O)4]2+ to residue-selectively hydrolyze X-Pro bonds in peptides at 6 </= pH </= 9 with the known ability of beta-cyclodextrin to recognize aromatic side chains and synthesized a conjugate reagent that acts as a sequence-specific peptidase. This new reagent cleaved the Ser6-Pro7 amide bond in bradykinin at pH 7. ROESY 1H NMR spectra gave evidence for inclusion of the side chain of Phe8 in the beta-cyclodextrin cavity, the interaction that makes the cleavage sequence specific.
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