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Regulation of Smoothened activity by Patched and lipoprotein lipids

 

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  • Product Description
 

Hedgehog is a morphogen that is carried on lipoproteins and that regulates patterning and proliferation. Hyperactivity of Hedgehog signaling causes numerous forms of cancer. Hedgehog acts via relieving repression of Smoothened by Patched - the mechanism of this repression has been unclear. The structural homology of Patched with bacterial transmembrane transporters suggests that Patched might regulate lipid trafficking to repress Smoothened. However, no endogenous lipid regulators of Smoothened have yet been identified, nor has it ever been shown that Patched actually controls lipid trafficking. This work shows that, in Drosophila melanogaster, Patched regulates Smoothened trafficking from Patched-positive endosomes. Furthermore, it demonstrates that Patched recruits internalized lipoproteins to these endosomes, thereby regulating the efflux of specific lipoprotein-derived lipids from this compartment and utilizing these lipids to repress Smoothened. We propose that Patched normally promotes Smoothened degradation and inhibits its activity by utilizing a specific lipoprotein-derived lipid. Further, we suggest that presence of Hedgehog on lipoproteins prevents their utilization.

Product Specifications
SKU :COC97756
AuthorHelena Khaliullina-Skultety
LanguageEnglish
BindingPaperback
Number of Pages128
Publishing Year2011-09-06T00:00:00.000
ISBN978-3838128115
Edition1 st
Book TypeBiology, life sciences
Country of ManufactureIndia
Product BrandNot defined
Product Packaging InfoBox
In The Box1 Piece
Product First Available On ClickOnCare.com2015-08-18 00:00:00
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