Low background FRET-substrates for lipases and esterases suitable for high-throughput screening under basic (pH 11)...

Area of Science:

• Biochemistry
• Organic Chemistry
• Enzymology

Background:

• Lipases and esterases are crucial enzymes with broad industrial applications.
• Developing efficient screening tools for these enzymes, especially under alkaline conditions, remains a challenge.
• Existing assays often suffer from background reactions or lack specificity.

Purpose of the Study:

• To synthesize novel FRET-based fluorogenic substrates for lipases and esterases.
• To evaluate the performance of these substrates in enzyme activity assays.
• To provide a practical high-throughput screening tool for enzyme activity under basic conditions.

Main Methods:

• Substrates were synthesized in a four-step process using commercially available materials.
• The substrates are pyrenebutyric acid monoesters of aliphatic 1,2-diols.
• A dinitrophenylamino group was incorporated as a quencher.

Main Results:

• Ester 2a demonstrated the highest reactivity among the synthesized substrates.
• The substrates exhibited no measurable background reaction, even at pH 11.
• The substrates reacted rapidly and specifically with lipases and esterases.

Conclusions:

• The developed FRET-based substrates are highly effective for detecting lipase and esterase activity.
• These substrates provide a robust and sensitive tool for high-throughput screening.
• The substrates overcome limitations of existing assays, particularly under alkaline conditions.