M17 aminopeptidases diversify function by moderating their macromolecular assemblies and active site environment

Area of Science:

• Biochemistry
• Molecular Biology
• Enzymology

Background:

• M17 aminopeptidases (M17-LAPs) are a family of enzymes with a conserved hexameric structure and binuclear metal center.
• These enzymes are known for cleaving N-terminal amino acids from peptides but are implicated in various other functions.
• The diverse roles of M17-LAPs extend beyond their canonical proteolytic activity, suggesting complex regulatory mechanisms.

Purpose of the Study:

• To investigate the broad spectrum of functions performed by M17 aminopeptidases.
• To elucidate the distinct molecular mechanisms underlying the diverse roles of M17-LAPs.
• To differentiate between aminopeptidase-based and association-driven functions of M17-LAPs.

Main Methods:

• Literature review and synthesis of existing research on M17 aminopeptidases.
• Analysis of studies identifying physiological roles and molecular mechanisms of M17-LAPs.
• Categorization of identified mechanisms into 'aminopeptidase-based' and 'association-driven' functions.

Main Results:

• M17-LAPs exhibit a remarkable ability to mediate diverse cellular functions through their conserved hexameric structure.
• Functions were categorized into characteristic proteolysis (aminopeptidase-based) and non-proteolytic roles involving macromolecular assembly (association-driven).
• Distinct molecular mechanisms employed by M17-LAPs lead to varied cellular outcomes.

Conclusions:

• The conserved hexameric structure of M17-LAPs is central to their multifaceted roles in cellular processes.
• Understanding the distinct 'aminopeptidase-based' and 'association-driven' mechanisms is crucial for comprehending the full physiological significance of M17-LAPs.
• M17-LAPs are critical regulators with diverse functions that warrant separate consideration in physiological contexts.