首页> 外文会议>International Association of Biomedical Gerontology(IABG) International Congress: Understanding and Modulating Aging; 20050813-16; Aarhus(DK) >Structural and Functional Differences between Mouse Mot-1 and Mot-2 Proteins That Differ in Two Amino Acids
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Structural and Functional Differences between Mouse Mot-1 and Mot-2 Proteins That Differ in Two Amino Acids

机译:两种氨基酸不同的小鼠Mot-1和Mot-2蛋白之间的结构和功能差异

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摘要

Chaperone functions mediated by the heat-shock protein (HSP) family constitute a fundamental mechanism that governs the life span of organisms. Here we investigated the chaperone activities of the mitochondrial HSP70 protein, mortalin, which is a heat-uninducible stress protein involved in immortalization and tumorigenesis. There are two mortalin alleles, mot-1 and mot-2, in mouse, encoding two distinct proteins. Whereas an overexpression of mot-1-induced senescence in NIH 3T3 cells, overexpression of mot-2 promoted their malignant properties. Here, we provide evidence that mot-1 possesses very low chaperone activity as compared to mot-2. A "lazy lid" hypothesis is proposed for their differential aging phenotypes.
机译:热激蛋白(HSP)家族介导的伴侣功能是控制生物体寿命的基本机制。在这里,我们研究了线粒体HSP70蛋白mortalin的分子伴侣活性,它是一种永生性和肿瘤发生过程中不可诱导的应激蛋白。小鼠中有两个mortalin等位基因mot-1和mot-2,编码两个不同的蛋白质。在NIH 3T3细胞中mot-1诱导的衰老过度表达,而mot-2的过度表达则促进了它们的恶性特性。在这里,我们提供的证据表明mot-1与mot-2相比具有非常低的伴侣活性。对于它们的不同衰老表型,提出了“懒惰的盖子”假说。

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