Lipid binding promotes the open conformation and tumor-suppressive activity of neurofibromin 2.

Lipid binding promotes the open conformation and tumor-suppressive activity of neurofibromin 2.
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DOI:
10.1038/s41467-018-03648-4
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发表时间:
2018-04-06
影响因子:
16.6
通讯作者:
Izard T
Izard T
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Chinthalapudi K;Mandati V;Zheng J;Sharff AJ;Bricogne G;Griffin PR;Kissil J;Izard T

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2型神经纤维瘤病(NF2)是一种神经系统肿瘤形成性疾病,由NF2的缺失或功能缺失突变引起,编码肿瘤抑制蛋白神经纤维蛋白2(也称为施万诺明或梅林)。神经纤维蛋白2是调节细胞骨架和细胞信号传导的埃兹蛋白、根蛋白、膜突蛋白(ERM)家族的成员。神经纤维蛋白2的肿瘤抑制功能和构象(开放或闭合)的相关性已经受到很多推测,通常基于从其他ERM蛋白的外推和争议。在这里,我们表明,脂质结合的结果在开放构象的神经纤维蛋白2和脂质结合是必要的抑制细胞增殖。总的来说,我们的研究结果提供了一种机制,其中开放的构象是明确相关的脂质结合和定位的膜,这是至关重要的肿瘤抑制功能的神经纤维蛋白2,从而最终调和长期的构象和功能的辩论。神经纤维蛋白2(NF2)是一种抑制细胞生长的肿瘤抑制因子。在这里,作者结合联合收割机的功能,生物化学和结构的研究,并表明,脂质结合的NF 2采用开放的构象和NF 2脂质结合是抑制细胞增殖所必需的。
Neurofibromatosis type 2 (NF2) is a tumor-forming disease of the nervous system caused by deletion or by loss-of-function mutations in NF2, encoding the tumor suppressing protein neurofibromin 2 (also known as schwannomin or merlin). Neurofibromin 2 is a member of the ezrin, radixin, moesin (ERM) family of proteins regulating the cytoskeleton and cell signaling. The correlation of the tumor-suppressive function and conformation (open or closed) of neurofibromin 2 has been subject to much speculation, often based on extrapolation from other ERM proteins, and controversy. Here we show that lipid binding results in the open conformation of neurofibromin 2 and that lipid binding is necessary for inhibiting cell proliferation. Collectively, our results provide a mechanism in which the open conformation is unambiguously correlated with lipid binding and localization to the membrane, which are critical for the tumor-suppressive function of neurofibromin 2, thus finally reconciling the long-standing conformation and function debate. Neurofibromin 2 (NF2) is a tumour suppressor that inhibits cell growth. Here the authors combine functional, biochemical, and structural studies and show that lipid-bound NF2 adopts an open conformation and that NF2 lipid binding is required for inhibition of cell proliferation.
对 NF2/Merlin 肿瘤抑制功能的分子见解。
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