An obligatory role of mind bomb-1 in notch signaling of mammalian development.

An obligatory role of mind bomb-1 in notch signaling of mammalian development.
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DOI:
10.1371/journal.pone.0001221
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发表时间:
2007-11-28
期刊:
影响因子:
3.7
通讯作者:
Kong YY
Kong YY
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Koo BK;Yoon MJ;Yoon KJ;Im SK;Kim YY;Kim CH;Suh PG;Jan YN;Kong YY

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Notch信号传导途径是进化上保守的细胞间信号传导模块,其对于需要Notch配体的内吞作用的细胞命运特化是必需的。结构上不同的E3泛素连接酶,神经化(Neur)和思维炸弹(Mib),协同调节果蝇中Notch配体的内吞作用。然而,哺乳动物E3泛素连接酶,神经元1,神经元2,Mib 1和Mib 2,在哺乳动物发育中的各自作用知之甚少。通过对哺乳动物遗传学的广泛应用,我们发现Neur 1和Neur 2双突变体和Mib 2 −/−小鼠是可行的,并且大体上是正常的。与此相反,Mib 1在各种组织中的条件失活揭示了代表性的Notch表型:动脉特异性缺陷为deltalike 4突变体,小脑和皮肤发育异常为锯齿状1条件突变体,并指畸形为锯齿状2突变体。我们的数据提供了第一个证据表明,Mib 1是必不可少的锯齿状以及Deltalike配体介导的Notch信号在哺乳动物的发展,而神经元1,神经元2,和Mib 2是不稳定的。
The Notch signaling pathway is an evolutionarily conserved intercellular signaling module essential for cell fate specification that requires endocytosis of Notch ligands. Structurally distinct E3 ubiquitin ligases, Neuralized (Neur) and Mind bomb (Mib), cooperatively regulate the endocytosis of Notch ligands in Drosophila. However, the respective roles of the mammalian E3 ubiquitin ligases, Neur1, Neur2, Mib1, and Mib2, in mammalian development are poorly understood. Through extensive use of mammalian genetics, here we show that Neur1 and Neur2 double mutants and Mib2−/− mice were viable and grossly normal. In contrast, conditional inactivation of Mib1 in various tissues revealed the representative Notch phenotypes: defects of arterial specification as deltalike4 mutants, abnormal cerebellum and skin development as jagged1 conditional mutants, and syndactylism as jagged2 mutants. Our data provide the first evidence that Mib1 is essential for Jagged as well as Deltalike ligand-mediated Notch signaling in mammalian development, while Neur1, Neur2, and Mib2 are dispensable.
DOI: 10.1074/jbc.m501631200
发表时间: 2005-06-10
影响因子: 4.8
作者:
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通讯作者: Kong, YY
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发表时间: 2005-05-01
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通讯作者: Rubin, GM
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发表时间: 2003-01-01
期刊: DEVELOPMENTAL CELL
影响因子: 11.8
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通讯作者: Chitnis, AB
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发表时间: 1991-10-01
期刊: EMBO JOURNAL
影响因子: 11.4
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通讯作者: JAN, YN