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Genetic analysis of punt a type II Dpp receptor that functions throughout the Drosophila melanogaster life cycle.

机译:平底船的遗传分析平底船是II型Dpp受体在果蝇的整个生命周期中都起作用。

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摘要

TGF-beta (transforming growth factor-beta-) mediated signal transduction affects growth and patterning in a variety of organisms. Here we report a genetic characterization of the Drosophila punt gene that encodes a type II serine/threonine kinase TGF-beta/Dpp (Decapentaplegic) receptor. Although the punt gene was originally identified based on its requirement for embryonic dorsal closure, we have documented multiple periods of punt activity throughout the Drosophila life cycle. We demonstrate that potentially related embryonic punt phenotypes, defects in dorsoventral patterning and dorsal closure, correspond to distinct maternal and zygotic requirements for punt. In addition, we document postembryonic requirements for punt activity. The tight correspondence between both embryonic and postembryonic loss-of-function punt and dpp phenotypes implicates a role for Punt in mediating virtually all Dpp signaling events in Drosophila. Finally, our comparison of punt homoallelic and heteroallelic phenotypes provides direct evidence for interallelic complementation. Taken together, these results suggest that the Punt protein functions as a dimer or higher order multimer throughout the Drosophila life cycle.
机译:TGF-β(转化生长因子-β-)介导的信号转导影响多种生物的生长和模式。在这里,我们报告果蝇平底鱼基因的遗传特征,该基因编码II型丝氨酸/苏氨酸激酶TGF-β/ Dpp(十足瘫痪)受体。尽管平底船基因最初是根据其对胚胎背侧闭合的要求而鉴定的,但我们已经记录了整个果蝇生命周期中平底船活动的多个时期。我们证明,潜在相关的胚胎unt表型,背腹模式和背闭合的缺陷,对应于不同的ma的母体和合子要求。此外,我们记录了平底船活动的胚胎后要求。胚胎和胚后功能丧失平底船和dpp表型之间的紧密对应关系暗示了平底船实际上介导了果蝇中所有Dpp信号事件的作用。最后,我们对punt同等位基因和异等位基因表型的比较提供了等位基因间互补的直接证据。综上所述,这些结果表明,在果蝇的整个生命周期中,Punt蛋白起着二聚体或更高阶多聚体的作用。

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