细胞形状和分裂七角位在线状Streptomyces中需要一个功能性的细胞壁糖聚合物酶CglA
Sukanya Bhowmick1, Ruth P Viveros1, Andreas Latoscha2
1Institute of Microbiology, Leibniz Universität Hannover, Hannover, Germany.
mBio
|September 9, 2024
概括
我们确定了CglA,它是Streptomyces细胞壁生物合成中的关键酶,对于维持细胞形状和活力至关重要. 它的缺失会破坏糖聚合物附着,导致异常的细胞结构,并降低了这些重要的生产抗生素的细菌的活力.
科学领域:
- 微生物学 微生物学
- 细菌细胞生物学 细菌细胞生物学
- 生物化学 生物化学
背景情况:
- 细胞壁对于细菌的完整性,形状和生存至关重要.
- 链杆菌对医学和生物技术至关重要,但它们的细胞壁生物发生学尚不清楚.
- 协调的细胞壁生物合成对于Streptomyces的生长和复杂分化成子至关重要.
研究的目的:
- 为了确定参与Streptomyces细胞壁糖聚合物合成和附着的关键蛋白质.
- 为了阐明CglA在S. venezuelae细胞壁生物发生中的功能.
- 为了研究糖聚合物装饰和Streptomyces细胞分裂之间的联系.
主要方法:
- 在S. venezuelae.中识别和表征CglA蛋白 (Vnz_13690)
- 在野生型和cglA突变菌株中分析细胞壁组成.
- 显微镜评估细胞形态,FtsZ环形成和子发育.
- 对cglA和disA突变体之间的相互作用进行遗传分析.
主要成果:
- 鉴定出CglA是一种关键的甘油聚合物结合酶,局部化到细胞壁合成部位.
- 该cglA突变体表现出减少的甘油聚合物含量,导致缩的叶和有缺陷的FtsZ环组装和定位.
- 错位的分离导致异常的细胞区,变形的子,并降低了细胞活力.
- 删除cglA挽救了disA突变的高盐生长缺陷,表明细胞壁糖聚合物和c-di-AMP信号传递之间的联系.
结论:
- CglA是Streptomyces细胞壁生物发生的一个新和必不可少的组成部分.
- 通过CglA介导的适当的甘油聚合物附着对于维护细菌中的细胞形状和完整性至关重要.
- CglA在调节细胞分裂和子形成方面发挥着重要作用,影响了细菌的整体活力.
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