Peptidyl Activity-Based Probes for Imaging Serine Proteases.

Area of Science:

• Biochemistry and Molecular Biology
• Enzymology
• Chemical Biology

Background:

• Proteases, enzymes catalyzing peptide bond hydrolysis, are crucial for numerous biological signaling pathways.
• Serine proteases represent the largest protease group (40%) and play vital roles in both normal physiology and disease.
• Controlling protease activity involves expression regulation, post-translational modifications, and endogenous inhibitors.

Purpose of the Study:

• To review the design principles of peptide-based imaging agents for serine proteases.
• To provide examples of activity-based probe (ABP) applications in studying serine proteases.
• To critically discuss the strengths, weaknesses, challenges, and limitations of these chemical tools.

Main Methods:

• Review of existing literature on peptidyl activity-based probes (ABPs) for serine proteases.
• Analysis of the fundamental principles guiding the design of peptide-based imaging agents.
• Compilation and discussion of representative ABP applications in biological contexts.

Main Results:

• Peptidyl ABPs are effective chemical reagents for detecting and imaging serine protease activity.
• These probes facilitate the characterization of protease activity within complex proteomic environments.
• The review highlights diverse applications and provides insights into the utility of ABPs.

Conclusions:

• Peptide-based activity-based probes are valuable tools for advancing the study of serine proteases.
• Understanding ABP design and application is key to characterizing enzyme function and dysfunction.
• Further development and critical evaluation are necessary to overcome current challenges and limitations.