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Developmentally regulated protein-tyrosine kinase genes in Dictyostelium discoideum.

机译:盘基网柄菌中发育受调节的蛋白酪氨酸激酶基因。

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Dictyostelium discoideum, an organism that undergoes development and that is amenable to biochemical and molecular genetic approaches, is an attractive model organism with which to study the role of tyrosine phosphorylation in cell-cell communication. We report the presence of protein-tyrosine kinase genes in D. discoideum. Screening of a Dictyostelium cDNA expression library with an anti-phosphotyrosine antibody identifies fusion proteins that exhibit protein-tyrosine kinase activity. Two distinct cDNAs were identified and isolated. Though highly homologous to protein kinases in general, these kinases do not exhibit many of the hallmarks of protein-tyrosine kinases of higher eucaryotes. In addition, these genes are developmentally regulated, which suggests a role for tyrosine phosphorylation in controlling Dictyostelium development.
机译:盘基网柄菌(Dictyostelium discoideum)是一种正在经历发育并适合生化和分子遗传学方法的生物,​​是一种有吸引力的模型生物,可用于研究酪氨酸磷酸化在细胞与细胞之间的通讯中的作用。我们报告D.discoideum中蛋白质酪氨酸激酶基因的存在。用抗磷酸酪氨酸抗体筛选Dictyostelium cDNA表达文库可鉴定出具有蛋白酪氨酸激酶活性的融合蛋白。鉴定并分离出两个不同的cDNA。尽管通常与蛋白激酶高度同源,但是这些激酶并未表现出高等真核生物蛋白酪氨酸激酶的许多特征。另外,这些基因在发育上受到调节,这暗示酪氨酸磷酸化在控制网柄菌的发育中的作用。

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