Porosome complex protein

Porosome complex proteins are the key components of the porosome, a **cup-shaped supramolecular lipoprotein structure** embedded in the cell plasma membrane, responsible for the **regulated release of intravesicular contents** such as neurotransmitters, hormones, and enzymes. Porosome complexes serve as universal secretory portals across various cell types, including neurons, endocrine, and exocrine cells, and typically comprise about 30–40 core proteins (such as SNARE proteins, calcium channels, actin, myosin, and regulatory molecules)[1][2][3][5][7]. These complexes are distinct from other secretion-related structures like the nuclear pore complex and are essential for **precise, partial, and transient vesicular secretion (kiss-and-run fusion)**[7]. Disruption or mutation in porosome components has been implicated in diseases including **neurological disorders, diabetes, cystic fibrosis, immune disorders, and certain cancers**[1][2][6][8]. Porosome proteins are emerging as **potential therapeutic targets** for correcting secretory defects that underlie these diseases, with experimental strategies involving reconstitution of the porosome complex in treatment paradigms[5][8]. However, there are **no known clinically approved drugs that directly target individual porosome proteins** as of now; current research is primarily focused on understanding and modulating the complex as a whole.

Other names

Porosome proteinSecretory portal proteinPorosome machinery protein

Modulation of secretion via altering porosome function; Regulation of vesicle docking and fusion with plasma membrane