Extending the functions of the homeotic transcription factor Cdx2 in the digestive system through nontranscriptional activities
延伸的同源异型转录因子CDX2的功能在通过nontranscriptional活动消化系统作者机构：INSERM UMR_S1113Université de StrasbourgFMTS67200 StrasbourgFrance Centre Hospitalier Universitaire de Strasbourg67200 StrasbourgFrance
出 版 物：《World Journal of Gastroenterology》 (世界胃肠病学杂志（英文版）)
年 卷 期：2015年第21卷第5期
页 面：1436-1443页
核心收录：
主 题：Homeobox Transcription Signaling DNA repair RNA splicing Intestine Development Cancer Homeostasis
摘 要：The homeoprotein encoded by the intestinal-specific Cdx2 gene is a major regulator of gut development and homeostasis,also involved in colon cancer as well as in intestinal-type metaplasias when it is abnormally expressed outside the gut.At the molecular level,structure/function studies have demonstrated that the Cdx2 protein is a transcription factor containing a conserved homeotic DNA-binding domain made ofthree alpha helixes arranged in a helix-turn-helix motif,preceded by a transcriptional domain and followed by a regulatory domain.The protein interacts with several thousand sites on the chromatin and widely regulates intestinal functions in stem/progenitor cells as well as in mature differentiated cells.Yet,this transcription factor also acts trough original nontranscriptional mechanisms.Indeed,the identification of novel protein partners of Cdx2 and also of a splicing variant revealed unexpected functions in the control of signaling pathways like the Wnt and NF-k B pathways,in double-strand break DNA repair and in premessenger RNA splicing.These novel functions of Cdx2 must be considered to fully understand the complexity of the role of Cdx2 in the healthy intestine and in diseases.
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