An intragenic SRF-dependent regulatory motif directs cardiac-specific microRNA-1-1/133a-2 expression.
An intragenic SRF-dependent regulatory motif directs cardiac-specific microRNA-1-1/133a-2 expression.
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基因内 SRF 依赖性调节基序指导心脏特异性 microRNA-1-1/133a-2 表达
DOI:
10.1371/journal.pone.0075470
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Chang J
中科院分区:
文献类型:
--
作者:
Li Q;Guo J;Lin X;Yang X;Ma Y;Fan GC;Chang J
Transcriptional regulation is essential for any gene expression including microRNA expression. MiR-1-1 and miR-133a-2 are essential microRNAs (miRs) involved in cardiac and skeletal muscle development and diseases. Early studies reveal two regulatory enhancers, an upstream and an intragenic, that direct the miR-1-1 and miR-133a-2 transcripts. In this study, we identify a unique serum response factor (SRF) binding motif within the enhancer through bioinformatic approaches. This motif is evolutionarily conserved and is present in a range of organisms from yeast, flies, to humans. We provide evidence to demonstrate that this regulatory motif is SRF-dependent in vitro by electrophoretic mobility shift assay, luciferase activity assay, and endogenous chromatin immunoprecipitation assay followed by DNA sequence confirmation, and in vivo by transgenic lacZ reporter mouse studies. Importantly, our transgenic mice indicate that this motif is indispensable for the expression of miR1-1/133a-2 in the heart, but not necessary in skeletal muscle, while the enhancer is sufficient for miR1-1/133a-2 gene expression in both tissues. The mutation of the motif alone completely abolishes miR-1-1/133a-2 gene expression in the animal heart, but not in the skeletal muscle. Our findings reveal an additional architecture of regulatory complex directing miR-1-1/133a-1 gene expression, and demonstrate how this intragenic enhancer differentially manages the expression of the two miRs in the heart and skeletal muscle, respectively.
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影响因子:
4.8
作者:
Yang, Xiangsheng;Li, Qi;Chang, Jiang
通讯作者:
Chang, Jiang
影响因子:
37.8
作者:
Chang, J;Wei, L;Schwartz, RJ
通讯作者:
Schwartz, RJ
DOI:
10.1083/jcb.200106008
发表时间:
2002-02-18
期刊:
The Journal of cell biology
影响因子:
--
作者:
Schratt G;Philippar U;Berger J;Schwarz H;Heidenreich O;Nordheim A
通讯作者:
Nordheim A
DOI:
10.1073/pnas.0409103102
发表时间:
2005-01-25
影响因子:
11.1
作者:
Li, SJ;Czubryt, MP;Olson, EN
通讯作者:
Olson, EN
影响因子:
5.3
作者:
Schratt, G;Weinhold, B;Nordheim, A
通讯作者:
Nordheim, A