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首页> 外文期刊>Molecular reproduction and development >Colocalization of CaM KII and MAP kinase on architectural elements of the mouse egg: potentiation of MAP kinase activity by CaM KII.
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Colocalization of CaM KII and MAP kinase on architectural elements of the mouse egg: potentiation of MAP kinase activity by CaM KII.

机译:CaM KII和MAP激酶在小鼠卵的结构元件上的共定位:CaM KII增强MAP激酶活性。

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摘要

The conversion of the egg to a zygote requires the initiation of several signaling pathways that act in an orchestrated fashion to rapidly remodel the egg. Architectural elements within the egg can serve to localize components of these signaling pathways and colocalization of such components provides the opportunity for interaction between different signaling pathways. This study examines the localization as well as the state of activation of two different kinases, MAP kinase and calcium/calmodulin-dependent protein kinase II (CaM KII). The meiotic spindle serves as a site for enrichment of these kinases. However, activated MAP kinase and activated CaM KII exhibit a developmental stage-specific pattern of localization that represents a subset of the area occupied by the distribution of the total mass of MAP kinase and CaM KII. Suppression of CaM KII activity results in reduction in the amount of MAP kinase as well as a decreased level of activity of MAP kinase. Since CaM KII becomes active as a result of fertilization, the former kinase could serve to potentiate MAP kinase activity and the colocalization of these two kinases may facilitate such an interaction.
机译:卵向合子的转化需要启动几种信号通路,这些信号通路以协调的方式起作用以快速地重塑卵。卵内的结构元件可用于定位这些信号传导途径的组成部分,并且此类组成部分的共定位提供了不同信号传导途径之间相互作用的机会。这项研究检查了两种不同激酶(MAP激酶和钙/钙调蛋白依赖性蛋白激酶II(CaM KII))的定位以及激活状态。减数分裂纺锤体充当富集这些激酶的位点。但是,活化的MAP激酶和活化的CaM KII表现出特定的发育阶段定位模式,代表着MAP激酶和CaM KII的总质量分布所占面积的一部分。 CaM KII活性的降低导致MAP激酶的量减少以及MAP激酶的活性水平降低。由于CaM KII由于受精而变得有活性,因此前一种激酶可以起到增强MAP激酶活性的作用,并且这两种激酶的共定位可能有助于这种相互作用。

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