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The insulin-like growth factor 1 (IGF-1) receptor is a protein found on the surface of human cells. It is a transmembrane receptor that is activated by a hormone called insulin-like growth factor 1 (IGF-1) and by a related hormone called IGF-2. It belongs to the large class of tyrosine kinase receptors. This receptor mediates the effects of IGF ...
IGF-1 is one of the most potent natural activators of the Akt signaling pathway, a stimulator of cell growth and proliferation, and a potent inhibitor of programmed cell death. [22] [23] The IGF-1 receptor and insulin receptor are two closely related members of a transmembrane tetrameric tyrosine kinase receptor family.
The IGF-1 receptor is the "physiological" receptor. IGF-1 binds to it at significantly higher affinity than it binds the insulin receptor. Like the insulin receptor, the IGF-1 receptor is a receptor tyrosine kinase —meaning the receptor signals by causing the addition of a phosphate molecule on particular tyrosines.
The insulin receptor (IR) is a transmembrane receptor that is activated by insulin, IGF-I, IGF-II and belongs to the large class of receptor tyrosine kinase. [5] Metabolically, the insulin receptor plays a key role in the regulation of glucose homeostasis; a functional process that under degenerate conditions may result in a range of clinical manifestations including diabetes and cancer.
The insulin-like growth factor receptors (IGFRs) include the following two receptors: Insulin-like growth factor 1 receptor (IGF-1R) Insulin-like growth factor 2 receptor (IGF-2R) See also. Insulin-like growth factor; Insulin-like growth factor 1; Insulin-like growth factor 2; Insulin-like growth factor-binding protein; References
DAF-2 is the only member of the insulin receptor family in C. elegans but it corresponds, in form and function, to multiple pathways in humans. The protein predicted from DAF-2's sequence is 35% identical to the human insulin receptor, which regulates metabolism; 34% identical to the IGF-1 receptor, which regulates growth; and 33% identical to ...
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