Molecular basis for the specific and multivariant recognitions of RNA substrates by human hnRNP A2/B1.

Molecular basis for the specific and multivariant recognitions of RNA substrates by human hnRNP A2/B1.
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人 hnRNP A2/B1 对 RNA 底物特异性和多变体识别的分子基础

DOI:
10.1038/s41467-017-02770-z
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发表时间:
2018-01-29
影响因子:
16.6
通讯作者:
Ma J
Ma J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wu B;Su S;Patil DP;Liu H;Gan J;Jaffrey SR;Ma J

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人hnRNP A2/B1是一种RNA结合蛋白,在许多生物学过程中发挥重要作用,包括mRNA的成熟、转运和代谢,以及长链非编码RNA的基因调控。据报道,hnRNPA 2/B1作为潜在的m6 A“阅读器”控制microRNA分选到外泌体并促进初级microRNA加工。hnRNP A2/B1包含两个RNA识别基序,其提供RNA底物的序列特异性识别。在这里,我们确定的晶体结构的串联RRM结构域的hnRNP A2/B1在复杂的各种RNA基板,阐明了特定的deletnitions的AGG和UAG图案的RRM 1和RRM 2域,分别。进一步的结构和生化结果表明,序列多样化的RNA底物的多变量结合模式,支持hnRNP A2/B1功能的RNA匹配机制。此外,结合生物信息学分析,我们的研究表明hnRNPA 2/B1可能通过“m6 A开关”机制介导m6 A的作用,而不是作为m6 A修饰的直接“阅读器”。
Human hnRNP A2/B1 is an RNA-binding protein that plays important roles in many biological processes, including maturation, transport, and metabolism of mRNA, and gene regulation of long noncoding RNAs. hnRNP A2/B1 was reported to control the microRNAs sorting to exosomes and promote primary microRNA processing as a potential m 6 A “reader.” hnRNP A2/B1 contains two RNA recognition motifs that provide sequence-specific recognition of RNA substrates. Here, we determine crystal structures of tandem RRM domains of hnRNP A2/B1 in complex with various RNA substrates, elucidating specific recognitions of AGG and UAG motifs by RRM1 and RRM2 domains, respectively. Further structural and biochemical results demonstrate multivariant binding modes for sequence-diversified RNA substrates, supporting a RNA matchmaker mechanism in hnRNP A2/B1 function. Moreover, our studies in combination with bioinformatic analysis suggest that hnRNP A2/B1 may mediate effects of m 6 A through a “m 6 A switch” mechanism, instead of acting as a direct “reader” of m 6 A modification.
n(6) - 甲基腺苷依赖性RNA结构开关调节RNA蛋白质相互作用。
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发表时间: 2015-02-26
期刊: NATURE
影响因子: 64.8
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发表时间: 2017-04-07
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发表时间: 2013-01-01
影响因子: 2.7
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Barraud, Pierre;Allain, Frederic H. -T.
通讯作者: Allain, Frederic H. -T.
DOI: 10.1093/nar/gkq1069
发表时间: 2011-01
影响因子: 14.9
作者:
Cook KB;Kazan H;Zuberi K;Morris Q;Hughes TR
通讯作者: Hughes TR