Matrin 3 binds and stabilizes mRNA.

Matrin 3 binds and stabilizes mRNA.
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基质3结合并稳定mRNA。

DOI:
10.1371/journal.pone.0023882
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Shiloh Y
Shiloh Y
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Salton M;Elkon R;Borodina T;Davydov A;Yaspo ML;Halperin E;Shiloh Y

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Matrin 3(MATR 3)是一种高度保守的内核基质蛋白,具有两个锌指结构域和两个RNA识别基序(RRM),其功能在很大程度上是未知的。最近,我们发现MATR 3被蛋白激酶ATM磷酸化,这激活了细胞对DNA双链断裂的反应。在这里,我们表明,MATR 3相互作用的RNA依赖性的方式与几个蛋白质在RNA加工的既定角色,并保持其与RNA通过其RRM 2域的相互作用。结合RNA的深度测序(RIP-seq)鉴定了几种小的非编码RNA种类。利用微阵列分析方法研究MATR 3在转录中的作用,我们鉴定了77个转录本,其数量依赖于MATR 3的存在。我们用9个也与MATR 3复合物结合的转录本验证了这一发现。最后,我们证明了MATR 3对于维持这些mRNA种类中的几种的稳定性的重要性,并得出结论,它在mRNA稳定中起作用。这些数据表明,已知高度调节的MATR 3的细胞水平调节一组基因转录物的稳定性。
Matrin 3 (MATR3) is a highly conserved, inner nuclear matrix protein with two zinc finger domains and two RNA recognition motifs (RRM), whose function is largely unknown. Recently we found MATR3 to be phosphorylated by the protein kinase ATM, which activates the cellular response to double strand breaks in the DNA. Here, we show that MATR3 interacts in an RNA-dependent manner with several proteins with established roles in RNA processing, and maintains its interaction with RNA via its RRM2 domain. Deep sequencing of the bound RNA (RIP-seq) identified several small noncoding RNA species. Using microarray analysis to explore MATR3′s role in transcription, we identified 77 transcripts whose amounts depended on the presence of MATR3. We validated this finding with nine transcripts which were also bound to the MATR3 complex. Finally, we demonstrated the importance of MATR3 for maintaining the stability of several of these mRNA species and conclude that it has a role in mRNA stabilization. The data suggest that the cellular level of MATR3, known to be highly regulated, modulates the stability of a group of gene transcripts.
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