...
【24h】

Molecular analysis of the cytosolic Didycostelium gamma-tubulin complex

机译:胞质Didycosteliumγ-微管蛋白复合物的分子分析

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

gamma-Tubulin plays an essential role in microtubule nucleation and organization and occurs, besides its centrosomal localization, in the cytosol, where it forms soluble complexes with other proteins. We investigated the size and composition of gamma-tubulin complexes in Dictyostelium, using a mutant cell line in which the endogenous copy of the gamma-tubulin gene had been replaced by a tagged version. Dictyostelium gamma-tubulin complexes were generally much smaller than the large gamma-tubulin ring complexes found in higher organisms. The stability of the small Dictyostelium gamma-tubulin complexes depended strongly on the purification conditions, with a striking stabilization of the complexes under high salt conditions. Furthermore, we cloned the Dictyostelium homolog of Spc97 and an almost complete sequence of the Dictyostelium homolog of Spc98, which are both components of gamma-tubulin complexes in other organisms. Both proteins localize to the centrosome in Dictyostelium throughout the cell cycle and are also present in a cytosolic pool. We could show that the prevailing small complex present in Dictyostelium consists of DdSpc98 and gamma-tubulin, whereas DdSpc97 does not associate. Dictyostelium is thus the first organism investigated so far where the three proteins do not interact stably in the cytosol.
机译:γ-管蛋白在微管的成核和组织中起着至关重要的作用,并且除了其中心体定位外,它还存在于细胞质中,并与其他蛋白质形成可溶性复合物。我们使用了一种突变细胞系,在其中将γ-微管蛋白基因的内源性拷贝已替换为标记版本,从而研究了网状杆菌中γ-微管蛋白复合物的大小和组成。 Dictyosteliumγ-微管蛋白复合物通常比在高等生物中发现的大型γ-微管蛋白环复合物小得多。小型Dictyosteliumγ-微管蛋白复合物的稳定性在很大程度上取决于纯化条件,在高盐条件下该复合物具有惊人的稳定性。此外,我们克隆了Spc97的网盘菌同系物和Spc98的网盘菌同系物的几乎完整序列,它们都是其他生物中γ-微管蛋白复合物的组成部分。在整个细胞周期中,这两种蛋白都位于单核细胞膜的中心体中,并且也存在于胞质池中。我们可以证明,存在于盘基网柄菌中的主要小复合物由DdSpc98和γ-微管蛋白组成,而DdSpc97不相关。因此,盘基网柄菌是迄今为止研究的第一种生物,其中三种蛋白质在胞质溶胶中不稳定地相互作用。

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