The core-promoter factor TRF2 mediates a Fruitless action to masculinize neurobehavioral traits in Drosophila.

The core-promoter factor TRF2 mediates a Fruitless action to masculinize neurobehavioral traits in Drosophila.
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DOI:
10.1038/s41467-017-01623-z
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发表时间:
2017-11-14
影响因子:
16.6
通讯作者:
Yamamoto D
Yamamoto D
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Chowdhury ZS;Sato K;Yamamoto D

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在果蝇中,雄性特异性的fruitless(fru)基因产物FruBM在建立雄性求偶行为的神经回路中起着核心作用,它通过协调单个神经元的雄性型规范所需的基因转录。在此,我们确定核心启动子识别因子基因Trf2作为一个显性修饰的fru行动。Trf2在性二态性mAL神经元中的敲低导致雄性特异性神经突的丢失和雄性求偶活力的降低。TRF2与FruBM形成阻遏物复合物,强烈增强了FruBM在robo1基因启动子区的阻遏物活性,其功能是抑制雄性特异性神经突形成所需的。在缺乏FruBM的女性中,TRF2刺激robo1转录。我们的研究结果表明,TRF2开关自己的作用从激活剂的转录抑制剂结合到FruBM,从而使同侧神经突的形成只在男性。 fruitless(fru)基因是果蝇中一个重要的性别决定基因,控制着果蝇神经解剖学性别差异的表达。在这里,作者报告说,核心启动子因子,TRF2,通过与robo1靶基因启动子处的FruBM同种型直接相互作用抑制雄性型神经突特化。
In fruit flies, the male-specific fruitless (fru) gene product FruBM plays a central role in establishing the neural circuitry for male courtship behavior by orchestrating the transcription of genes required for the male-type specification of individual neurons. We herein identify the core promoter recognition factor gene Trf2 as a dominant modifier of fru actions. Trf2 knockdown in the sexually dimorphic mAL neurons leads to the loss of a male-specific neurite and a reduction in male courtship vigor. TRF2 forms a repressor complex with FruBM, strongly enhancing the repressor activity of FruBM at the promoter region of the robo1 gene, whose function is required for inhibiting the male-specific neurite formation. In females that lack FruBM, TRF2 stimulates robo1 transcription. Our results suggest that TRF2 switches its own role from an activator to a repressor of transcription upon binding to FruBM, thereby enabling the ipsilateral neurite formation only in males. fruitless (fru) is an important sex-determinant gene that controls the expression of neuroanatomical sex differences in Drosophila. Here the authors report that a core-promoter factor, TRF2, suppresses a male-type neurite specification through direct interaction with FruBM isoform at the robo1 target gene promoter.
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