Stable MOB1 interaction with Hippo/MST is not essential for development and tissue growth control.

Stable MOB1 interaction with Hippo/MST is not essential for development and tissue growth control.
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MOB1 与 Hippo/MST 的稳定相互作用对于发育和组织生长控制并不重要。

DOI:
10.1038/s41467-017-00795-y
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发表时间:
2017-09-25
影响因子:
16.6
通讯作者:
Hergovich A
Hergovich A
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Kulaberoglu Y;Lin K;Holder M;Gai Z;Gomez M;Assefa Shifa B;Mavis M;Hoa L;Sharif AAD;Lujan C;Smith ESJ;Bjedov I;Tapon N;Wu G;Hergovich A

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Hippo 肿瘤抑制通路对于发育和组织生长控制至关重要,包含一个由 Hippo (MST1/2)、Warts (LATS1/2) 和 Tricornered (NDR1/2) 激酶组成的核心盒,以及作为重要信号传导接头的 MOB1。然而,目前尚不清楚 MOB1 和不同 Hippo 核心激酶之间的哪些调节相互作用协调发育、组织生长和肿瘤抑制。在这里,我们报告了 MOB1/NDR2 复合物的晶体结构,并定义了介导 MOB1 与 Hippo 核心激酶差异结合的关键 MOB1 残基,从而建立了具有选择性相互作用丧失的 MOB1 变体。通过研究人类癌细胞和果蝇中的这些变异,我们发现 MOB1/Warts 结合对于肿瘤抑制、组织生长控制和发育至关重要,而稳定的 MOB1/Hippo 结合是可有可无的,单独的 MOB1/Trc 结合是不够的。总的来说,我们从分子、细胞生物学和遗传学角度解密了 Hippo 核心激酶与关键 MOB1 信号转导器之间多种相互作用的重要性。 Hippo 肿瘤抑制途径对于发育和组织生长控制至关重要。在这里,作者采用多学科方法来表征三种 Hippo 激酶与信号适配器 MOB1 的相互作用,并展示它们如何不同地影响发育、组织生长和肿瘤抑制。
The Hippo tumor suppressor pathway is essential for development and tissue growth control, encompassing a core cassette consisting of the Hippo (MST1/2), Warts (LATS1/2), and Tricornered (NDR1/2) kinases together with MOB1 as an important signaling adaptor. However, it remains unclear which regulatory interactions between MOB1 and the different Hippo core kinases coordinate development, tissue growth, and tumor suppression. Here, we report the crystal structure of the MOB1/NDR2 complex and define key MOB1 residues mediating MOB1’s differential binding to Hippo core kinases, thereby establishing MOB1 variants with selective loss-of-interaction. By studying these variants in human cancer cells and Drosophila, we uncovered that MOB1/Warts binding is essential for tumor suppression, tissue growth control, and development, while stable MOB1/Hippo binding is dispensable and MOB1/Trc binding alone is insufficient. Collectively, we decrypt molecularly, cell biologically, and genetically the importance of the diverse interactions of Hippo core kinases with the pivotal MOB1 signal transducer. The Hippo tumor suppressor pathway is essential for development and tissue growth control. Here the authors employ a multi-disciplinary approach to characterize the interactions of the three Hippo kinases with the signaling adaptor MOB1 and show how they differently affect development, tissue growth and tumor suppression.
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