Expression of engrailed proteins in arthropods, annelids, and chordates.

Expression of engrailed proteins in arthropods, annelids, and chordates.
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节肢动物、环节动物和脊索动物中嵌入蛋白的表达。

DOI:
10.1016/0168-9525(89)90182-0
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发表时间:
1989
期刊:
影响因子:
64.5
通讯作者:
Howard Hughes
Howard Hughes
中科院分区:
生物学1区
文献类型:
--
作者:
E. Martín;Kevin G. Coleman;Stephen J. Poole;Michael C. Ellis;T. B. Kornberg;Corey S. Goodman;Howard Hughes

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摘要enrailed是一个同源异型盒基因,在果蝇的体节中起重要作用。在其他几种生物体中也发现了与enrailed同源的基因。在这里,我们描述了一种单克隆抗体,它可以识别一些不同的节肢动物,环节动物和脊索动物的蛋白质的同源结构域中的保守表位;我们使用这种抗体来分离蚱蜢的enrailed基因。在果蝇胚胎中,该抗体揭示了在分割过程中每个节段的后部,以及在神经发生过程中神经元细胞的节段重复子集中的交错蛋白。其他节肢动物,包括蚱蜢和两种甲壳类动物,也有类似的表达模式。然而,这些模式的表达不共享的环节动物或脊索动物,我们研究。我们的研究结果提供了最全面的观点,已获得的调控基因的表达模式如何在进化过程中变化。这些模式的基础上,我们认为,enrailed是一个基因,其祖先的功能是在神经发生和其功能是增选在节肢动物的分割的演变过程中,但不是在环节动物和脊索动物。
Summary engrailed is a homeobox gene that has an important role in Drosophila segmentation. Genes homologous to engrailed have been identified in several other organisms. Here we describe a monoclonal antibody that recognizes a conserved epitope in the homeodomain of engrailed proteins of a number of different arthropods, annelids, and chordates; we use this antibody to isolate the grasshopper engrailed gene. In Drosophila embryos, the antibody reveals engrailed protein in the posterior portion of each segment during segmentation, and in a segmentally reiterated subset of neuronal cells during neurogenesis. Other arthropods, including grasshopper and two crustaceans, have similar patterns of engrailed expression. However, these patterns of expression are not shared by the annelids or chordates we examined. Our results provide the most comprehensive view that has been obtained of how expression patterns of a regulatory gene vary during evolution. On the basis of these patterns, we suggest that engrailed is a gene whose ancestral function was in neurogenesis and whose function was co-opted during the evolution of segmentation in the arthropods, but not in the annelids and chordates.
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