A potent and highly selective sulfotransferase inhibitor

Area of Science:

• Biochemistry
• Enzyme Inhibition
• Drug Discovery

Background:

• Beta-arylsulfotransferase-IV (hSULT1C1) plays a role in xenobiotic metabolism.
• Inhibitors of hSULT1C1 are of interest for therapeutic and research applications.
• A robust screening method is needed to identify novel inhibitors.

Purpose of the Study:

• To identify novel inhibitors of beta-arylsulfotransferase-IV.
• To characterize the potency and specificity of identified inhibitors.

Main Methods:

• Development and application of a novel fluorescence-based high-throughput screening assay.
• Screening of a library exceeding 30,000 diverse chemical compounds.
• Biochemical characterization of identified inhibitors, including enzyme kinetics and specificity profiling.

Main Results:

• Eleven distinct beta-arylsulfotransferase-IV inhibitors were discovered.
• Most inhibitors exhibited low micromolar activity.
• One compound demonstrated potent inhibition with a Ki of 96 nM.
• The most potent inhibitor displayed significant specificity against other purine binding enzymes.

Conclusions:

• A novel fluorescence-based assay is effective for screening beta-arylsulfotransferase-IV inhibitors.
• A potent and specific inhibitor of beta-arylsulfotransferase-IV was identified.
• This inhibitor represents a promising lead for further drug development or biochemical studies.