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pubmed-article:19366682pubmed:abstractTextThe seven-pass transmembrane protein Smoothened (Smo) is an essential component of the Hedgehog (Hh) signaling pathway that is critically involved in normal animal development as well as pathological malignancies. In studying Hh-related biological processes, it would be highly desirable if Smo activity could be instantly switched between activation and inhibition. Using Gli1-dependent GFP transgenic zebrafish and in vitro biochemical assays, we identified and characterized two potent Smo inhibitors, SANT74 and 75 (Smoothened antagonist 74 and 75), by screening a small molecule library designed based on the scaffold of Smo agonist SAG. These compounds are structural analogs of SAG with the methyl group substituted by a propyl or allyl group in SANTs. We show that SANTs and SAG exert opposite effects on Smo activity by regulating protein conformation. Our study represents the first demonstration of conformational regulation of Smo by small molecule analogs, and the combinational use of these Smo modulators in a temporal controlled fashion should be useful for studying Hh biology.lld:pubmed
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pubmed-article:19366682pubmed:authorpubmed-author:XiangJingJlld:pubmed
pubmed-article:19366682pubmed:authorpubmed-author:JiangJinJlld:pubmed
pubmed-article:19366682pubmed:authorpubmed-author:LinShuoSlld:pubmed
pubmed-article:19366682pubmed:authorpubmed-author:ROSSJ KJKlld:pubmed
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pubmed-article:19366682pubmed:authorpubmed-author:YangZhenZlld:pubmed
pubmed-article:19366682pubmed:authorpubmed-author:ZhaoYunYlld:pubmed
pubmed-article:19366682pubmed:authorpubmed-author:ChenJames KJKlld:pubmed
pubmed-article:19366682pubmed:authorpubmed-author:YangHongboHlld:pubmed
pubmed-article:19366682pubmed:authorpubmed-author:WangNengdongNlld:pubmed
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pubmed-article:19366682pubmed:dateRevised2010-9-27lld:pubmed
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pubmed-article:19366682pubmed:articleTitleConverse conformational control of smoothened activity by structurally related small molecules.lld:pubmed
pubmed-article:19366682pubmed:affiliationCollege of Life Sciences, Peking University, Beijing 100871, China.lld:pubmed
pubmed-article:19366682pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:19366682pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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