...
首页> 外文期刊>Molecular biology of the cell >Mdm30 is an F-box protein required for maintenance of fusion-competent mitochondria in yeast
【24h】

Mdm30 is an F-box protein required for maintenance of fusion-competent mitochondria in yeast

机译:Mdm30是维持酵母中具有融合能力的线粒体所需的F-box蛋白

获取原文
获取原文并翻译 | 示例
           

摘要

Mitochondrial fusion and fission play important roles for mitochondrial morphology and function. We identified Mdm30 as a novel component required for maintenance of fusion-competent mitochondria in yeast. The Mdm30 sequence contains an F-box motif that is commonly found in subunits of Skp1-Cdc53-F-box protein ubiquitin ligases. A fraction of Mdm30 is associated with mitochondria. Cells lacking Mdm30 contain highly aggregated or fragmented mitochondria instead of the branched tubular network seen in wild-type cells. Deltamdm30 cells lose mitochondrial DNA at elevated temperature and fail to fuse mitochondria. in zygotes at all temperatures. These defects are rescued by deletion of DNM1, a gene encoding a component of the mitochondrial division machinery. The protein level of Fzo1, a key component of the mitochondrial fusion machinery, is regulated by Mdm30. Elevated Fzo1 levels in cells lacking Mdm30 or in cells overexpressing Fzo1 from a heterologous promoter induce mitochondrial aggregation in a similar manner. Our results suggest that Mdm30 controls mitochondrial shape by regulating the steady-state level of Fzo1 and point to a connection of the ubiquitin/26S proteasome system and mitochondria. [References: 64]
机译:线粒体融合和裂变对于线粒体的形态和功能起着重要的作用。我们确定Mdm30为维持酵母中具有融合能力的线粒体所需的新型成分。 Mdm30序列包含一个F-box基序,通常在Skp1-Cdc53-F-box蛋白泛素连接酶的亚基中发现。 Mdm30的一部分与线粒体有关。缺乏Mdm30的细胞包含高度聚集或破碎的线粒体,而不是野生型细胞中见到的分支管状网络。 Deltamdm30细胞在升高的温度下会丢失线粒体DNA,无法融合线粒体。在所有温度下都受精卵。通过删除DNM1(一种编码线粒体分裂机制组分的基因)可以挽救这些缺陷。线粒体融合机制的关键组成部分Fzo1的蛋白质水平受Mdm30调控。缺乏Mdm30的细胞中或来自异源启动子的Fzo1过表达的细胞中Fzo1的水平升高,以相似的方式诱导线粒体聚集。我们的结果表明,Mdm30通过调节Fzo1的稳态水平来控制线粒体形状,并指向泛素/ 26S蛋白酶体系统与线粒体的连接。 [参考:64]

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