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Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Proc+Natl+Acad+Sci+U+S+A 2016 ; 113 (40): E5866-75 Nephropedia Template TP
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Mechanism of inhibition of the tumor suppressor Patched by Sonic Hedgehog #MMPMID27647915
Tukachinsky H; Petrov K; Watanabe M; Salic A
Proc Natl Acad Sci U S A 2016[Oct]; 113 (40): E5866-75 PMID27647915show ga
The Hedgehog-signaling pathway plays key roles in animal development and physiology. Insufficient Hedgehog signaling causes birth defects, whereas uncontrolled signaling is implicated in cancer. Signaling is triggered by the secreted protein, Sonic Hedgehog, which inhibits the membrane protein Patched1, leading to pathway activation. Despite its fundamental importance, we do not understand how Sonic Hedgehog inhibits Patched1. Here, we uncover a critical interaction between the fatty-acid?modified N-terminal portion of Sonic Hedgehog and Patched1, and we demonstrate that it is necessary and sufficient for Patched1 inhibition during Hedgehog signaling. This interaction explains impairment of a Sonic Hedgehog mutant causing a congenital brain malformation (holoprosencephaly) and oncogenic activity of Patched1 mutants responsible for a human cancer syndrome.