Class A basic helix-loop-helix protein 15 (bHLHa15) also known as class B basic helix-loop-helix protein 8 (bHLHb8) or muscle, intestine and stomach expression 1 (MIST-1) is a protein that in humans is encoded by the BHLHA15 gene.[1][2][3]
Function
bHLHa15 is required developmentally for the proper organization of all protein secreting, serous exocrine glands. In the absence of Mist1, exocrine tissue shows improper organization of organelles, especially the localization of the zymogen granules. The zymogen granules are the vesicles that store enzymes near the plasma membrane for easy release when stimulated. This disorganization caused by the loss of Mist1 leads to increased susceptibility toward pancreatic damage and potentially pancreatic cancer.
References
↑McLellan AS, Langlands K, Kealey T (Sep 2003). "Exhaustive identification of human class II basic helix-loop-helix proteins by virtual library screening". Mech Dev. 119 Suppl 1: S285–91. doi:10.1016/S0925-4773(03)00130-8. PMID14516699.
↑Stevens JD, Roalson EH, Skinner MK (Dec 2008). "Phylogenetic and expression analysis of the basic helix-loop-helix transcription factor gene family: genomic approach to cellular differentiation". Differentiation. 76 (9): 1006–22. doi:10.1111/j.1432-0436.2008.00285.x. PMID18557763.
Pin CL, Lemercier C, Konieczny SF (2000). "Cloning of the murine Mist1 gene and assignment to mouse chromosome band 5G2-5G3". Cytogenet. Cell Genet. 86 (3–4): 219–22. doi:10.1159/000015342. PMID10575209.
McLellan AS, Langlands K, Kealey T (2003). "Exhaustive identification of human class II basic helix-loop-helix proteins by virtual library screening". Gene Expr. Patterns. 2 (3–4): 329–35. doi:10.1016/S0925-4773(02)00390-8. PMID12617822.
Zhao Y, Johansson C, Tran T, et al. (2006). "Identification of a basic helix-loop-helix transcription factor expressed in mammary gland alveolar cells and required for maintenance of the differentiated state". Mol. Endocrinol. 20 (9): 2187–98. doi:10.1210/me.2005-0214. PMID16645041.
