A mechanism for FtsZ-independent proliferation in Streptomyces.

A mechanism for FtsZ-independent proliferation in Streptomyces.
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DOI:
10.1038/s41467-017-01596-z
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发表时间:
2017-11-09
影响因子:
16.6
通讯作者:
Errington J
Errington J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Santos-Beneit F;Roberts DM;Cantlay S;McCormick JR;Errington J

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细菌细胞分裂的核心分子FtsZ在几乎所有被测试过的生物体中都是必不可少的,但最明显的例外是链霉菌。链霉菌与许多细菌的不同之处在于从细胞尖端生长并经历分支,类似于丝状真菌。在这里,我们展示了有限的细胞损伤,无论是机械的还是酶的,导致委内瑞拉链霉菌ftsZ突变体的菌丝微菌落几乎完全破坏。这一结果与缺乏依赖ftsZ的交叉壁一致,可能与最近提出的膜结构在其他链霉菌物种中ftsZ突变体增殖中的作用不一致。很少幸存的菌丝体碎片,通常在树枝周围,似乎是重新密封的首选地点。野生型和ftsZ突变菌丝的菌丝片段的生长恢复可以发生在多个位点,通过在其尖端含有DivIVA蛋白的分枝状外生物。因此,我们的结果强调分支是不依赖于ftsz的细胞增殖的一种手段。FtsZ蛋白在细胞分裂中起关键作用,在大多数细菌物种中是必需的;例外情况包括链菌,它们从细胞尖端生长并形成分枝菌丝。在这里,Santos-Beneit等人表明分支允许委内瑞拉链霉菌不依赖ftsz的增殖。
The central player in bacterial cell division, FtsZ, is essential in almost all organisms in which it has been tested, with the most notable exception being Streptomyces. Streptomycetes differ from many bacteria in growing from the cell tip and undergoing branching, similar to filamentous fungi. Here we show that limited cell damage, either mechanical or enzymatic, leads to near complete destruction of mycelial microcolonies of a Streptomyces venezuelae ftsZ mutant. This result is consistent with a lack of ftsZ-dependent cross-walls and may be inconsistent with a recently proposed role for membrane structures in the proliferation of ftsZ mutants in other Streptomyces species. Rare surviving fragments of mycelium, usually around branches, appear to be the preferred sites of resealing. Restoration of growth in hyphal fragments of both wild-type and ftsZ mutant hyphae can occur at multiple sites, via branch-like outgrowths containing DivIVA protein at their tips. Thus, our results highlight branching as a means of FtsZ-independent cell proliferation. Protein FtsZ plays key roles in cell division and is essential in most bacterial species; exceptions include streptomycetes, which grow from the cell tip and form branched hyphae. Here, Santos-Beneit et al. show that branching allows FtsZ-independent proliferation in Streptomyces venezuelae.
DOI: 10.1073/pnas.0337542100
发表时间: 2003-02-18
影响因子: 11.1
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