Embryo development. A cysteine-clamp gene drives embryo polarity in the midge Chironomus.

Embryo development. A cysteine-clamp gene drives embryo polarity in the midge Chironomus.
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DOI:
10.1126/science.aaa7105
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发表时间:
2015-05-29
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Schmidt-Ott U
Schmidt-Ott U
中科院分区:
其他
文献类型:
--
作者:
Klomp J;Athy D;Kwan CW;Bloch NI;Sandmann T;Lemke S;Schmidt-Ott U

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在常见的果蝇中,头部的形成是由一个单一的基因驱动的,bicoid,它产生主要胚胎轴的头尾极性。双头体缺乏导致胚胎尾对尾极性,没有头。然而,大多数昆虫缺乏双头体,而建立头尾极性的分子机制尚不清楚。我们已经确定了一种基因,这种基因决定了一种像蚊子一样的蠓,Chironomus riparius的头尾极性。这个名为panish的基因编码一个半胱氨酸夹紧DNA结合域,其运作机制与bicoid不同。这一发现,结合panish和bicoid的系统发育分布仅限于特定家族的观察,揭示了身体轴决定因素的频繁进化变化,为研究基因调控网络进化提供了一个绝佳的机会。
In the common fruit fly Drosophila, head formation is driven by a single gene, bicoid, which generates head-to-tail polarity of the main embryonic axis. Bicoid deficiency results in embryos with tail-to-tail polarity and no head. However, most insects lack bicoid, and the molecular mechanism for establishing head-to-tail polarity is poorly understood. We have identified a gene that establishes head-to-tail polarity of the mosquito-like midge, Chironomus riparius. This gene, named panish, encodes a cysteine-clamp DNA binding domain and operates through a different mechanism than bicoid. This finding, combined with the observation that the phylogenetic distributions of panish and bicoid are limited to specific families of flies, reveals frequent evolutionary changes of body axis determinants and a remarkable opportunity to study gene regulatory network evolution.
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