The distinct RNA-interaction modes of a small ZnF domain underlay TUT4(7) diverse action in miRNA regulation.

The distinct RNA-interaction modes of a small ZnF domain underlay TUT4(7) diverse action in miRNA regulation.
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小型ZNF结构域的不同RNA互动模式在miRNA调控中底层TUT4(7)各种作用。

DOI:
10.1080/15476286.2021.1991169
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发表时间:
2021-11-12
期刊:
影响因子:
4.1
通讯作者:
Ramos A
Ramos A
中科院分区:
生物学3区
文献类型:
--
作者:
Chaves-Arquero B;Collins KM;Christodoulou E;Nicastro G;Martin SR;Ramos A

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TUT 4和密切相关的TUT 7是在不同发育阶段所需的非模板化聚(U)聚合酶,并且它们的错误调节或突变与重要的癌症病理学有关。虽然TUT 4(7)与其pre-miRNA靶标的相互作用已被详细描述,但更广泛的靶标识别过程的分子基础尚不清楚。在这里,我们研究RNA结合蛋白质的ZnF结构域。我们发现TUT 4(7)ZnF 2包含两个不同的RNA结合表面,用于与不同靶标中的不同RNA核碱基相互作用,即这个小结构域编码TUT 4(7)选择性和分子功能的多样性。有趣的是,与其他充分表征的CCHC ZnF不同,ZnF 2不与侧翼ZnF 3物理偶联,并且在miRNA识别中独立起作用,而TUT 4的剩余CCHC ZnF(7),ZnF 1,已经失去了其固有的RNA结合能力。总之,我们的数据表明TUT 4的ZnFs(7)是RNA的独立单元,可能是蛋白质-蛋白质相互作用的独立单元,这些相互作用增强了蛋白质的功能灵活性,并可能在构建其相互作用网络中发挥重要作用。
TUT4 and the closely related TUT7 are non-templated poly(U) polymerases required at different stages of development, and their mis-regulation or mutation has been linked to important cancer pathologies. While TUT4(7) interaction with its pre-miRNA targets has been characterized in detail, the molecular bases of the broader target recognition process are unclear. Here, we examine RNA binding by the ZnF domains of the protein. We show that TUT4(7) ZnF2 contains two distinct RNA binding surfaces that are used in the interaction with different RNA nucleobases in different targets, i.e that this small domain encodes diversity in TUT4(7) selectivity and molecular function. Interestingly and unlike other well-characterized CCHC ZnFs, ZnF2 is not physically coupled to the flanking ZnF3 and acts independently in miRNA recognition, while the remaining CCHC ZnF of TUT4(7), ZnF1, has lost its intrinsic RNA binding capability. Together, our data suggest that the ZnFs of TUT4(7) are independent units for RNA and, possibly, protein-protein interactions that underlay the protein’s functional flexibility and are likely to play an important role in building its interaction network.
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发表时间: 2015-03-31
影响因子: 14.9
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影响因子: 14.9
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