...
首页> 外文期刊>FEMS Yeast Research >Discrete roles of trehalose and Hsp104 in inhibition of protein aggregation in yeast cells
【24h】

Discrete roles of trehalose and Hsp104 in inhibition of protein aggregation in yeast cells

机译:海藻糖和HSP104在酵母细胞蛋白质聚集抑制中的离散作用

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

Heat shock response (HSR) is an important element of cellular homeostasis. In yeast, HSR comprises of the heat shock proteins (Hsps) and the osmolytes trehalose and glycerol. The respective roles of trehalose and Hsp104 in regulating protein aggregation remain ambiguous. We report that trehalose and Hsp104 are important during the early stages of protein aggregation, i.e. when the process is still reversible. This corroborates the earlier reported role of trehalose being an inhibitor of protein folding. Under in vitro conditions, trehalose is able to restore the GdHCl-induced loss of ATPase activity of recombinant Hsp104 to almost its original level. As the saturation phase of aggregation approaches, neither of the two components is able to exert any effect. Inactivation of Hsp104 at the stage when oligomers have already been formed increases the rate of formation of aggregates by inhibiting disaggregation of oligomers. In the absence of an active disaggregase, the oligomers are converted to mature irreversible aggregates, accelerating their formation. Our results suggest that the disaccharide may have a marginally stronger influence than Hsp104 in inhibiting protein aggregation in yeast cells.
机译:热休克反应(HSR)是细胞稳态的重要因素。在酵母中,HSR包含热休克蛋白(HSP)和渗透渗透剂海藻糖和甘油。海藻糖和HSP104在调节蛋白质聚集方面的各自作用仍然存在含糊不清。我们认为海藻糖和HSP104在蛋白质聚集的早期阶段是重要的,即,当该过程仍然可逆时。这种证实了早期报告的海藻糖是蛋白质折叠抑制剂的作用。在体外条件下,海藻糖能够恢复重组Hsp104的GDHCL诱导的ATP酶活性丧失,几乎是其原始水平。作为聚合方法的饱和阶段,两个组件都不能够发挥任何效果。当已经形成低聚物时,在阶段灭活HSP104通过抑制低聚物的分解来增加聚集体的形成速率。在没有活跃的解淀酶的情况下,寡聚体转化为成熟的不可逆聚集体,加速其形成。我们的研究结果表明,二糖可能具有比HSP104在抑制酵母细胞中的蛋白质聚集中的略微强烈的影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号