A microtiter colorimetric assay for the HIV-1 protease

Area of Science:

• Biochemistry
• Enzymology
• Assay Development

Background:

• Human Immunodeficiency Virus type 1 (HIV-1) protease is a critical target for antiviral therapy.
• Existing assays for screening HIV-1 protease inhibitors may have limitations in throughput or adaptability.

Purpose of the Study:

• To develop a novel, high-throughput colorimetric assay for the detection of HIV-1 protease activity.
• To create an assay adaptable for screening inhibitors of other proteolytic enzymes.

Main Methods:

• Enzymatic hydrolysis of a synthetic peptide substrate.
• A two-step nonenzymatic colorimetric reaction involving carbamylation and carbamidodiacetyl reactions.
• Assay performed in microtiter plates, amenable to automation.

Main Results:

• A novel colorimetric assay for HIV-1 protease activity was successfully developed.
• The assay is suitable for high-throughput screening of potential inhibitors.
• The assay methodology is readily adaptable to other proteolytic enzymes.

Conclusions:

• The developed colorimetric assay offers a robust and adaptable platform for HIV-1 protease inhibitor screening.
• This method facilitates efficient drug discovery efforts against HIV-1.
• The assay's adaptability broadens its utility in studying various proteolytic enzymes.