The Bacillus spore coat
The Bacillus spore coat
复制标题
DOI：
10.1094/phyto.2004.94.11.1249
复制
发表时间：
2004-11-01
期刊：
影响因子：
3.2
通讯作者：
Driks, A
中科院分区：
文献类型：
--
作者：
Driks, A
土壤中大量存在的芽孢杆菌，在饥饿时形成高度抵抗的休眠细胞类型，称为孢子。孢子被组织成一系列同心排列的结构，每个结构以不同的方式抵抗环境压力。在某些细菌中，包括枯草芽孢杆菌，这些结构的最外层是多层蛋白质外壳，称为外壳。这件外套既是一个装甲板，几乎可以肯定的是，具有酶活性，使它具有积极的作用。在孢子组装过程中，小心控制组成外壳的蛋白质的组装，从而在横截面中看到不同的层图案，以及表面上的不连续的脊图案。虽然我们对孢子外壳组成和组装的理解正在加深，但我们仍然对孢子与其他生物之间相互作用的作用知之甚少，特别是在土壤中。孢子外壳研究的关键未来方向包括继续鉴定构成外壳表面的蛋白质，表征该表面的全球化学特征，以及阐明这些特征如何影响土壤中的其他生物。
Bacilli, which are abundant in the soil, form highly resistant dormant cell types, called spores, in response to starvation. The spore is organized into a series of concentrically arranged structures, each of which contribute in a different way to resistance against environmental stress. In certain bacteria, including Bacillus subtilis, the outermost of these structures is a multilayered protein shell, called the coat. The coat is both an armor plating and, almost certainly, possesses enzymatic activities, allowing it to have active roles as well. Assembly of the proteins comprising the coat is carefully controlled during spore assembly, resulting in a distinct pattern of layers, seen in cross section, and a discreet pattern of ridges on the surface. Although our understanding of spore coat composition and assembly is deepening, we still know little about the roles of the coat in interactions between spores and other organisms, particularly in the soil. Critical future directions for spore coat research include continued identification of the proteins that comprise the coat surface, characterization of the global chemical characteristics of this surface, and elucidation of how these features impact on other organisms in the soil.