Context-dependent regulatory mechanism of the splicing factor hnRNP L.

Context-dependent regulatory mechanism of the splicing factor hnRNP L.
复制标题

DOI:
10.1016/j.molcel.2009.12.027
复制
发表时间:
2010-01-29
期刊:
影响因子:
16
通讯作者:
Lynch KW
Lynch KW
中科院分区:
生物学1区
文献类型:
--
作者:
Motta-Mena LB;Heyd F;Lynch KW

文献摘要

参考文献

被引文献

相似文献

剪接调节蛋白在与外显子和内含子结合时通常具有不同的活性。然而,不太清楚的是,除了位置之外的变量是否会影响活动。HnRNP L结合存在于CD 45可变外显子4和5两者中的基序以影响它们的配位阻遏。在这里,我们表明,在其直接抑制外显子4相反,hnRNP L抑制外显子5通过对抗相邻的剪接增强子的活性。在不存在增强子的情况下,hnRNP L出乎意料地激活外显子包含。由于外显子4和5侧翼的剪接位点是不同的,我们直接研究了不同剪接位点强度对hnRNP L功能机制的影响。值得注意的是,hnRNP L与外显子的结合抑制强剪接位点,但增强弱剪接位点。hnRNP L稳定snRNP结合的模型可以以由固有snRNP-底物亲和力确定的方式解释这两种效应。
Splicing regulatory proteins often have distinct activities when bound to exons versus introns. However, less clear is whether variables besides location can influence activity. HnRNP L binds to a motif present in both CD45 variable exons 4 and 5 to affect their coordinate repression. Here we show that, in contrast to its direct repression of exon 4, hnRNP L represses exon 5 by countering the activity of a neighboring splicing enhancer. In the absence of the enhancer hnRNP L unexpectedly activates exon inclusion. As the splice sites flanking exon 4 and 5 are distinct, we directly examined the effect of varying splice site strength on the mechanism of hnRNP L function. Remarkably, binding of hnRNP L to an exon represses strong splice sites but enhances weak splice sites. A model in which hnRNP L stabilizes snRNP binding can explain both effects in a manner determined by the inherent snRNP-substrate affinity.
DOI: 10.1093/nar/gkg616
发表时间: 2003-07-01
影响因子: 14.9
作者:
Cartegni, L;Wang, JH;Krainer, AR
通讯作者: Krainer, AR
DOI: 10.1261/rna.725208
发表时间: 2008-02-01
期刊: RNA
影响因子: 4.5
作者:
Hung, Lee-Hsueh;Heiner, Monika;Bindereif, Albrecht
通讯作者: Bindereif, Albrecht
DOI: 10.1261/rna.1212008
发表时间: 2008-10-01
期刊: RNA
影响因子: 4.5
作者:
Topp, Justin D.;Jackson, Jason;Lynch, Kristen W.
通讯作者: Lynch, Kristen W.
DOI: 10.1128/mcb.00419-07
发表时间: 2007-10-01
影响因子: 5.3
作者:
Melton, Alexis A.;Jackson, Jason;Lynch, Kristen W.
通讯作者: Lynch, Kristen W.
DOI: 10.1038/nsmb1149
发表时间: 2006-10-01
影响因子: 16.8
作者:
House, Amy E.;Lynch, Kristen W.
通讯作者: Lynch, Kristen W.