Fluorescent D-amino-acids reveal bi-cellular cell wall modifications important for Bdellovibrio bacteriovorus predation.

Fluorescent D-amino-acids reveal bi-cellular cell wall modifications important for Bdellovibrio bacteriovorus predation.
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DOI:
10.1038/s41564-017-0029-y
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发表时间:
2017-12
影响因子:
28.3
通讯作者:
Sockett RE
Sockett RE
中科院分区:
生物学1区
文献类型:
--
作者:
Kuru E;Lambert C;Rittichier J;Till R;Ducret A;Derouaux A;Gray J;Biboy J;Vollmer W;VanNieuwenhze M;Brun YV;Sockett RE

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含有细胞壁的必需细菌肽聚糖(PG)的修饰可导致抗生素抗性,例如通过L,D-转肽酶活性的β-内酰胺抗性。捕食性噬菌蛭弧菌是天然抗菌的,通过穿越、修改并最终破坏革兰氏阴性猎物细菌的壁来对抗感染,当它们在猎物体内生长时修改它们自己的PG。从历史上看,在两个相似的PG壁上的这些多酶过程已经证明具有挑战性,难以阐明。在这里,与PG标记的方法,利用定时脉冲的多个荧光D-氨基酸(FDAA),我们照亮的动态变化,捕食者和猎物的墙壁通过在不同阶段的细菌:细菌入侵。我们发现,在猎物壁形成一个加强的圆形端口孔; L,D-转肽酶Bd介导的D-氨基酸修饰加强猎物PG在蛭弧菌入侵和捕食者延长的带状模式。这个过程之后是非常规的,多点和同步分离的细胞内蛭弧菌,容纳奇数和偶数的后代形成的非二进制分裂。
Modification of essential bacterial peptidoglycan (PG) containing cell walls can lead to antibiotic resistance, for example β-lactam resistance by L,D-transpeptidase activities. Predatory Bdellovibrio bacteriovorus are naturally antibacterial and combat infections by traversing, modifying and finally destroying walls of Gram-negative prey bacteria, modifying their own PG as they grow inside prey. Historically, these multi-enzymatic processes on two similar PG walls have proved challenging to elucidate. Here, with a PG labelling approach utilizing timed pulses of multiple fluorescent D-amino acids (FDAAs), we illuminate dynamic changes that predator and prey walls go through during the different phases of bacteria:bacteria invasion. We show formation of a reinforced circular port-hole in the prey wall; L,D-transpeptidaseBd mediated D-amino acid modifications strengthening prey PG during Bdellovibrio invasion and a zonal mode of predator-elongation. This process is followed by unconventional, multi-point and synchronous septation of the intracellular Bdellovibrio, accommodating odd- and even-numbered progeny formation by non-binary division.
DOI: 10.1038/srep26010
发表时间: 2016-05-23
期刊: Scientific reports
影响因子: 4.6
作者:
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通讯作者: Sockett RE
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发表时间: 2012-12-07
期刊: Angewandte Chemie (International ed. in English)
影响因子: --
作者:
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发表时间: 2007-07-01
影响因子: 3.2
作者:
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发表时间: 2011-08-19
影响因子: 4.8
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