Insensible is a novel nuclear inhibitor of Notch activity in Drosophila.

Insensible is a novel nuclear inhibitor of Notch activity in Drosophila.
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DOI:
10.1371/journal.pone.0098213
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Schweisguth F
Schweisguth F
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Coumailleau F;Schweisguth F

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Notch信号调节广泛的发育过程。在果蝇外周神经系统中,Notch调节一系列二元命运决定,导致规则间隔的感觉器官的形成。每个感觉器官都是由单个感觉器官前体细胞(SOP)通过一系列不对称细胞分裂产生的。从SOP特异性顺式调节模块(CRM)开始,我们确定了insensive(insb),又名CG 6520,作为编码抑制Notch信号传导活性的核因子的SOP/神经元特异性基因。首先,Insb的过表达导致Notch报告基因的转录抑制和与Notch抑制相关的表型。其次,虽然insb活性的完全丧失没有显著的表型,但它增强了与无毛水平降低相关的刚毛表型,无毛是一种核蛋白,作为无毛抑制因子的共抑制物。总之,我们的工作确定Insb作为一种新的SOP/神经元特异性的Notch活性的果蝇核抑制剂。
Notch signalling regulates a wide range of developmental processes. In the Drosophila peripheral nervous system, Notch regulates a series of binary fate decisions that lead to the formation of regularly spaced sensory organs. Each sensory organ is generated by single sensory organ precursor cell (SOP) via a series of asymmetric cell divisions. Starting from a SOP-specific Cis-Regulatory Module (CRM), we identified insensible (insb), a.k.a CG6520, as a SOP/neuron-specific gene encoding a nuclear factor that inhibits Notch signalling activity. First, over-expression of Insb led to the transcriptional repression of a Notch reporter and to phenotypes associated with the inhibition of Notch. Second, while the complete loss of insb activity had no significant phenotype, it enhanced the bristle phenotype associated with reduced levels of Hairless, a nuclear protein acting as a co-repressor for Suppressor of Hairless. In conclusion, our work identified Insb as a novel SOP/neuron-specific nuclear inhibitor of Notch activity in Drosophila.
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