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Elucidating drug-metalloprotein interactions with tris(pyrazolyl)borate model complexes.
1Department of Chemistry and Biochemistry, University of California-San Diego, La Jolla, CA 92093-0358, USA.
Inorganic Chemistry
|October 2, 2002
Summary
This study explored how different thiol-derived matrix metalloproteinase (MMP) inhibitors bind to zinc. Beta-mercaptoketones and beta-mercaptoamides bind bidentately, while beta-mercaptoalcohols bind monodentately, revealing crucial drug-metalloprotein interactions.
Area of Science:
- Inorganic Chemistry
- Medicinal Chemistry
- Structural Biology
Background:
- Matrix metalloproteinases (MMPs) are crucial drug targets.
- Understanding inhibitor binding to the MMP zinc active site is vital for drug design.
- Thiol-derived inhibitors are a key class of MMP modulators.
Purpose of the Study:
- To elucidate the binding modes of various thiol-derived zinc-binding groups (ZBGs) to a model zinc complex.
- To provide experimental data on inhibitor coordination relevant to MMP active sites.
- To inform the design of next-generation MMP inhibitors.
Main Methods:
- Synthesis of six tetrahedral zinc complexes with different thiol-derived ZBGs.
- X-ray crystallography to determine the solid-state structures of the metal complexes.
- Analysis of coordination modes (monodentate vs. bidentate) of the ZBGs.
Main Results:
- Beta-mercaptoketones and beta-mercaptoamides coordinate to the zinc ion in a bidentate manner.
- Beta-mercaptoalcohols exhibit monodentate coordination, binding solely through the sulfur atom.
- Differential binding modes were observed for distinct classes of thiol-derived inhibitors.
Conclusions:
- Model complexes effectively reveal drug-metalloprotein interactions.
- The observed binding modes provide a structural basis for MMP inhibition assay results.
- These findings are instrumental for rational second-generation drug design targeting MMPs.