首页> 外文期刊>Journal of Molecular Biology >Structure of the Tubulin/FtsZ-like protein TubZ from pseudomonas bacteriophage ΦkZ
【24h】

Structure of the Tubulin/FtsZ-like protein TubZ from pseudomonas bacteriophage ΦkZ

机译:假单胞菌噬菌体ΦkZ的微管蛋白/ FtsZ样蛋白TubZ的结构

获取原文
获取原文并翻译 | 示例
           

摘要

Pseudomonas ΦKZ-like bacteriophages encode a group of related tubulin/FtsZ-like proteins believed to be essential for the correct centring of replicated bacteriophage virions within the bacterial host. In this study, we present crystal structures of the tubulin/FtsZ-like protein TubZ from Pseudomonas bacteriophage ΦKZ in both the monomeric and protofilament states, revealing that ΦKZ TubZ undergoes structural changes required to polymerise, forming a canonical tubulin/FtsZ-like protofilament. Combining our structures with previous work, we propose a polymerisation-depolymerisation cycle for the Pseudomonas bacteriophage subgroup of tubulin/FtsZ-like proteins. Electron cryo-microscopy of ΦKZ TubZ filaments polymerised in vitro implies a long-pitch helical arrangement for the constituent protofilaments. Intriguingly, this feature is shared by the other known subgroup of bacteriophage tubulin/FtsZ-like proteins from Clostridium species, which are thought to be involved in partitioning the genomes of bacteriophages adopting a pseudo-lysogenic life cycle.
机译:假单胞菌ΦKZ样噬菌体编码一组相关的微管蛋白/ FtsZ样蛋白,被认为对于在细菌宿主中正确定位复制的噬菌体病毒粒子是必不可少的。在这项研究中,我们介绍了来自假单胞菌噬菌体ΦKZ的微管蛋白/ FtsZ样蛋白TubZ的晶体结构,处于单体和原丝状态,揭示ΦKZTubZ经历了聚合所需的结构变化,形成了典型的微管蛋白/ FtsZ样原丝。将我们的结构与以前的工作相结合,我们提出了微管蛋白/ FtsZ-样蛋白的假单胞菌噬菌体亚组的聚合-解聚循环。体外聚合的ΦKZTubZ细丝的电子低温显微镜观察表明,构成原丝的螺距很长。有趣的是,此特征与梭状芽胞杆菌属的另一种噬菌体微管蛋白/ FtsZ-样蛋白的已知亚组共有,这些亚组被认为与采用假溶原性生命周期的噬菌体基因组分配有关。

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