PIEZO1 Gene: Function, Mutations, and Associated Diseases | Biomedical Resource

PIEZO1 encodes a large, evolutionarily conserved mechanosensitive ion channel that directly responds to mechanical forces such as membrane stretch and shear stress. It forms a homotrimeric complex with a unique propeller-like structure, featuring a central pore that conducts cations (primarily Ca2+, Na+, and K+). PIEZO1 is critical for various physiological processes including vascular development, red blood cell volume regulation, and cellular mechanotransduction. Mutations in PIEZO1 are associated with hereditary xerocytosis (a red blood cell disorder) and lymphatic dysplasia. The gene is widely expressed across tissues, with particularly high levels in the lung, bladder, and skin. PIEZO1 has also been implicated in cancer biology, where its expression can influence tumor progression and metastasis.

Tissue Expression

Cell Line Expression

Hotspot Mutations

Mutation functional classification

• Mechanotransduction pathway (via PIEZO1 activation)

• Calcium signaling pathway (downstream of PIEZO1-mediated Ca2+ influx)

• Regulation of actin cytoskeleton (via Rho GTPases

• influenced by PIEZO1)

• Red blood cell homeostasis (volume regulation)

• Lymphatic vessel development (valve formation)

PIEZO1 is a large transmembrane protein (~2500 amino acids) that forms a trimeric channel with a unique three-bladed propeller architecture. Each monomer consists of 38 transmembrane helices, with a central pore domain that is structurally distinct from other ion channels. The protein undergoes conformational changes in response to membrane tension, opening a non-selective cation pore. PIEZO1 is post-translationally modified (e.g., glycosylation) and interacts with various intracellular partners, including the cytoskeleton and signaling molecules. Its activity is modulated by lipids such as cholesterol and phosphoinositides. The protein is essential for mechanosensation in multiple tissues, and its dysfunction underlies several human diseases.