Natural products with calmodulin inhibitor properties

Area of Science:

• Biochemistry
• Pharmacology
• Natural Products Chemistry

Background:

• Calmodulin (CaM) is a crucial calcium-binding protein involved in numerous cellular signaling pathways.
• Dysregulation of CaM activity is implicated in various diseases, making CaM inhibitors valuable therapeutic targets.
• Naturally occurring compounds represent a rich source of potential CaM inhibitors.

Purpose of the Study:

• To comprehensively review naturally occurring compounds with calmodulin-inhibitory properties.
• To categorize these compounds based on their structural classes and natural sources.
• To highlight potent natural anti-CaM substances and their discovery methods.

Main Methods:

• Literature review of scientific databases for compounds with reported calmodulin-inhibitory activity.
• Classification of identified compounds into structural categories (e.g., alkaloids, peptides).
• Analysis of natural sources from which these compounds were isolated.
• Examination of discovery methodologies, particularly enzymatic functional assays.

Main Results:

• A compendium of approximately 159 natural products exhibiting calmodulin-inhibitory properties was compiled.
• Alkaloid and peptide-type compounds constitute the majority of identified inhibitors.
• Potent natural anti-CaM agents include animal venoms and the antibiotic polymyxin.
• Enzymatic functional assays were the primary method for discovering these compounds.

Conclusions:

• A diverse array of natural products, particularly alkaloids and peptides, possess significant calmodulin-inhibitory potential.
• Natural sources like plants, animal venoms, and microbial products offer promising leads for developing novel CaM-targeting therapeutics.
• Further investigation into these natural calmodulin inhibitors could yield new therapeutic agents for various diseases.