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The dual nature of KLHL proteins: From cellular regulators to disease drivers
Verdiana Di Giulio1, Angelo Canciello1, Erminia Carletti2
1Department of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo 64100, Italy.
Abstract:
The Kelch-like (KLHL) protein family, characterized by its conserved BTB, BACK, and Kelch domains, serves as substrate adaptors for Cullin 3-RING ligases (CRL3), facilitating the ubiquitination and degradation of specific target proteins. Through this mechanism, KLHL proteins regulate numerous physiological processes, including cytoskeletal organization, oxidative stress response, and cell cycle progression. Dysregulation of KLHL proteins-via mutations or abnormal expression-has been implicated in various pathological conditions, including neurodegenerative disorders, cancer, cardiovascular diseases, and hereditary syndromes. This review provides a comprehensive overview of the physiological and pathological roles of KLHL proteins, emphasizing their specific substrates and mechanisms of action. By integrating structural and mechanistic insights with translational research, this review underscores the potential of KLHL proteins as promising therapeutic targets, offering new opportunities to combat a wide spectrum of complex diseases.
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