Cell surface F1-F0 ATP synthase (ATP synthase)

Cell surface F1-F0 ATP synthase, also known as ectopic ATP synthase, is a form of the mitochondrial enzyme complex found on the plasma membrane of various cells, particularly endothelial cells. In this location, it serves as a high-affinity receptor for the anti-angiogenic protein angiostatin and plays a critical role in regulating extracellular ATP levels and intracellular pH (Moser et al., 1999, PNAS). These functions are essential for the proliferation, migration, and survival of endothelial cells during angiogenesis (Chi and Pizzo, 2006, Drug News Perspect). In cancer, the expression of this enzyme is significantly upregulated on the surface of tumor-associated endothelial cells, facilitating tumor vascularization and growth (Chang et al., 2012, Cancer Science). Targeting cell surface ATP synthase with inhibitors like angiostatin or specific antibodies has been shown to effectively suppress angiogenesis and induce apoptosis in tumor-associated vessels. Because the enzyme is selectively accessible on the surface of activated endothelial cells compared to the sequestered mitochondrial pool in normal tissues, it represents a promising target for site-specific anti-cancer therapies (Vantourout et al., 2010, Blood).

Other names

Ecto-ATP synthaseEctopic ATP synthaseAngiostatin receptorEcto-F1-F0-ATPaseCell surface mitochondrial ATP synthase

Inhibition of extracellular ATP synthesis and hydrolysis, leading to suppression of endothelial cell proliferation and migration.