Array-on-Array Strategy For Activity-Based Enzyme Profiling.

Area of Science:

• Biochemistry
• Molecular Biology
• Assay Development

Background:

• Enzymatic activity screening is crucial for drug discovery and diagnostics.
• Current methods can be limited in throughput and multiplexing capabilities.
• Previous droplet-based screening established a foundation for single-enzyme analysis.

Purpose of the Study:

• To develop a novel array-on-array strategy to enhance enzymatic activity screening throughput.
• To enable multiplexed analysis of diverse enzymes and mixed samples on a single microarray.
• To facilitate rapid enzyme characterization using a droplet-based approach.

Main Methods:

• A two-step spotting process was employed: first, spotting enzymes at varying concentrations, then spotting fluorogenic substrates.
• The strategy utilizes microarrays for spatial organization of enzyme and substrate droplets.
• Varying spotting patterns allowed for testing different enzyme classes (proteases, phosphatases, kinases) and substrates.

Main Results:

• The array-on-array strategy demonstrated enhanced throughput for enzymatic activity screening.
• Multiplexed screening of multiple enzymes and substrates within a single microarray was achieved.
• The method allows for simultaneous testing of enzymes and complex biological samples.

Conclusions:

• The developed array-on-array strategy significantly improves the efficiency of enzymatic screening.
• This approach offers unprecedented capabilities for multiplexed enzyme testing and characterization.
• The method builds upon established droplet-based screening for rapid, high-throughput analysis.