Sex determination in insects: a binary decision based on alternative splicing.

Sex determination in insects: a binary decision based on alternative splicing.
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DOI:
10.1016/j.gde.2011.03.001
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发表时间:
2011-08
影响因子:
4
通讯作者:
Salz, Helen K.
Salz, Helen K.
中科院分区:
生物学2区
文献类型:
--
作者:
Salz, Helen K.

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控制性别决定的基因调控网络因物种而异。尽管存在这些差异,昆虫的比较研究发现,选择性剪接在进化过程中反复使用,以控制关键性别决定基因的表达。性别决定在果蝇中得到了最好的理解,其中 RNA 结合蛋白编码基因 Sex-lethal 的激活是雌性决定的核心事件。性致死是一种基因开关,因为一旦激活,它就会通过正反馈剪接机制控制自身的表达。在其他双翅目和膜翅目昆虫中,性命运选择也通过自我维持的正反馈剪接机制来维持,尽管不同的RNA结合蛋白编码基因起到二元开关的作用。探索性别特异性剪接机制的研究揭示了性别决定与其他发育调控网络整合的程度。
The gene regulatory networks that control sex determination vary between species. Despite these differences, comparative studies in insects have found that alternative splicing is reiteratively used in evolution to control expression of the key sex determining genes. Sex determination is best understood in Drosophila where activation of the RNA binding protein encoding gene Sex-lethal is the central female-determining event. Sex-lethal serves as a genetic switch because once activated it controls its own expression by a positive feedback splicing mechanism. Sex fate choice in is also maintained by self-sustaining positive feedback splicing mechanisms in other dipteran and hymenopteran insects, although different RNA binding protein encoding genes function as the binary switch. Studies exploring the mechanisms of sex-specific splicing have revealed the extent to which sex determination is integrated with other developmental regulatory networks.
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