Alpha-endosulfine is a protein that in humans is encoded by the ENSAgene.[5][6]
The protein encoded by this gene belongs to a highly conserved cAMP-regulated phosphoprotein (ARPP) family. This protein was identified as an endogenous ligand for the sulfonylurea receptor, ABCC8/SUR1. ABCC8 is the regulatory subunit of the ATP-sensitive potassium (KATP) channel, which is located on the plasma membrane of pancreatic beta cells and plays a key role in the control of insulin release from pancreatic beta cells. This protein is thought to be an endogenous regulator of KATP channels. In vitro studies have demonstrated that this protein modulates insulin secretion through the interaction with KATP channel, and this gene has been proposed as a candidate gene for type 2 diabetes. At least eight alternatively spliced transcript variants encoding distinct isoforms have been observed.[6]
Héron L, Virsolvy A, Apiou F, Le Cam A, Bataille D (1999). "Isolation, characterization, and chromosomal localization of the human ENSA gene that encodes alpha-endosulfine, a regulator of beta-cell K(ATP) channels". Diabetes. 48 (9): 1873–6. doi:10.2337/diabetes.48.9.1873. PMID10480622.
Kim SH, Lubec G (2002). "Decreased alpha-endosulfine, an endogenous regulator of ATP-sensitive potassium channels, in brains from adult Down syndrome patients". Protein Expression in Down Syndrome Brain. pp. 1–9. doi:10.1007/978-3-7091-6262-0_1. ISBN978-3-211-83704-7. PMID11771735. {{cite book}}: |journal= ignored (help)
Wang H, Craig RL, Schay J, Chu W, Das SK, Zhang Z, Elbein SC (2004). "Alpha-endosulfine, a positional and functional candidate gene for type 2 diabetes: molecular screening, association studies, and role in reduced insulin secretion". Mol. Genet. Metab. 81 (1): 9–15. doi:10.1016/j.ymgme.2003.08.003. PMID14728986.
Gabrielsson BG, Karlsson AC, Lönn M, Olofsson LE, Johansson JM, Torgerson JS, Sjöström L, Carlsson B, Edén S (2004). "Molecular characterization of a local sulfonylurea system in human adipose tissue". Mol. Cell. Biochem. 258 (1–2): 65–71. doi:10.1023/B:MCBI.0000012837.11847.c8. PMID15030171. S2CID22988098.