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首页> 外文期刊>Development >Requirements of genetic interactions between Src42A, armadillo and shotgun, a gene encoding E-cadherin, for normal development in Drosophila.
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Requirements of genetic interactions between Src42A, armadillo and shotgun, a gene encoding E-cadherin, for normal development in Drosophila.

机译:果蝇正常发育需要Src42A,犰狳和shot弹枪(编码E-钙粘蛋白的基因)之间的遗传相互作用。

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摘要

Src42A is one of the two Src homologs in Drosophila. Src42A protein accumulates at sites of cell-cell or cell-matrix adhesion. Anti-Engrailed antibody staining of Src42A protein-null mutant embryos indicated that Src42A is essential for proper cell-cell matching during dorsal closure. Src42A, which is functionally redundant to Src64, was found to interact genetically with shotgun, a gene encoding E-cadherin, and armadillo, a Drosophila beta-catenin. Immunoprecipitation and a pull-down assay indicated that Src42A forms a ternary complex with E-cadherin and Armadillo, and that Src42A binds to Armadillo repeats via a 14 amino acid region, which contains the major autophosphorylation site. The leading edge of Src mutant embryos exhibiting the dorsal open phenotype was frequently kinked and associated with significant reduction in E-cadherin, Armadillo and F-actin accumulation, suggesting that not only Src signaling but also Src-dependent adherens-junction stabilization would appear likely to be essential for normal dorsal closure. Src42A and Src64 were required for Armadillo tyrosine residue phosphorylation but Src activity may not be directly involved in Armadillo tyrosine residue phosphorylation at the adherens junction.
机译:Src42A是果蝇中两个Src同源物之一。 Src42A蛋白积聚在细胞与细胞或细胞基质粘附的部位。 Src42A蛋白无效突变体胚胎的抗Engrailed抗体染色表明,Src42A对于在背侧闭合过程中正确进行细胞间匹配至关重要。在功能上对Src64冗余的Src42A被发现与shot弹枪(一种编码E-钙粘蛋白的基因)和犰狳(一种果蝇β-连环蛋白)发生了遗传相互作用。免疫沉淀和下拉分析表明Src42A与E-钙粘蛋白和犰狳形成三元复合物,并且Src42A通过包含主要自磷酸化位点的14个氨基酸区域与Armadillo重复序列结合。表现出背侧开放表型的Src突变体胚胎的前缘经常扭结并与E-钙粘蛋白,犰狳和F-肌动蛋白积累的显着减少有关,这表明不仅Src信号传导而且依赖于Src的粘附结稳定也可能出现对正常的背侧闭合至关重要。犰狳酪氨酸残基磷酸化需要Src42A和Src64,但Src活性可能不直接参与粘附连接处的犰狳酪氨酸残基磷酸化。

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