Optimized Proteomic Analysis of Insulin Granules From MIN6 Cells Identifies Scamp3, a Novel Regulator of Insulin Secretion and Content.

Pancreatic β-cells in the islets of Langerhans are key to maintaining glucose homeostasis by secreting the peptide hormone insulin. Insulin is packaged within vesicles named insulin secretory granules (ISGs), which recently have been considered to have intrinsic structures and proteins that regulate insulin granule maturation, trafficking, and secretion. Previously, studies have identified a handful of novel ISG-associated proteins, using different separation techniques.