Abstract

Membrane-targeting proteins are crucial components of many cellular signaling pathways, including the secretion of insulin. Granuphilin (also known as synaptotagmin-like protein 4) is essential for proper insulin secretion and acts most likely in docking the exocytic vesicles to the plasma membrane. However, the precise mechanisms of its membrane targeting and regulation remain uncertain. Granuphilin contains two C2 domains (C2A and C2B) involved in the process of docking to the lipid bilayer of the plasma membrane.

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