Discovery of chlamydial peptidoglycan reveals bacteria with murein sacculi but without FtsZ.

Discovery of chlamydial peptidoglycan reveals bacteria with murein sacculi but without FtsZ.
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DOI:
10.1038/ncomms3856
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发表时间:
2013
影响因子:
16.6
通讯作者:
Jensen, Grant J.
Jensen, Grant J.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Pilhofer, Martin;Aistleitner, Karin;Biboy, Jacob;Gray, Joe;Kuru, Erkin;Hall, Edward;Brun, Yves V.;VanNieuwenhze, Michael S.;Vollmer, Waldemar;Horn, Matthias;Jensen, Grant J.

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衣原体是重要的病原体和共生菌,具有独特的细胞生物学特征。它们缺乏细胞分裂蛋白FtsZ,该蛋白在几乎所有其他细菌中都起着维持细胞形状和协调细胞分裂的作用。此外,衣原体细胞包膜中肽聚糖(PG)的存在一直备受争议。使用电子cryotomography,质谱和荧光标记染料,在这里,我们表明,一些环境衣原体细胞壁球囊组成的一个不寻常的PG型。用磷霉素(一种PG合成抑制剂)治疗导致感染率降低和细胞形状异常,表明PG合成对衣原体生命周期至关重要。我们的研究结果表明,第一次存在的PG在衣原体的成员。他们还提出了一个独特的例子,细菌与PG球囊,但没有FtsZ,挑战目前的假设,这是一个细胞壁的缺乏,使FtsZ非必需的。
Chlamydiae are important pathogens and symbionts, with unique cell biology features. They lack the cell-division protein FtsZ, which functions in maintaining cell shape and orchestrating cell division in almost all other bacteria. In addition, the existence of peptidoglycan (PG) in chlamydial cell envelopes has been highly controversial. Using electron cryotomography, mass spectrometry and fluorescent labeling dyes, here we show that some environmental chlamydiae have cell-wall sacculi consisting of an unusual PG type. Treatment with fosfomycin (a PG synthesis inhibitor) leads to lower infection rates and aberrant cell shapes, suggesting that PG synthesis is crucial for the chlamydial life cycle. Our findings demonstrate for the first time the presence of PG in a member of the Chlamydiae. They also present a unique example of a bacterium with a PG sacculus but without FtsZ, challenging the current hypothesis that it is the absence of a cell wall that renders FtsZ non-essential.
DOI: 10.1002/anie.201206749
发表时间: 2012-12-07
期刊: Angewandte Chemie (International ed. in English)
影响因子: --
作者:
Kuru E;Hughes HV;Brown PJ;Hall E;Tekkam S;Cava F;de Pedro MA;Brun YV;VanNieuwenhze MS
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