Biological functions and biogenesis of secreted bacterial outer membrane vesicles.

Biological functions and biogenesis of secreted bacterial outer membrane vesicles.
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DOI:
10.1146/annurev.micro.091208.073413
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发表时间:
2010
影响因子:
10.5
通讯作者:
Kuehn MJ
Kuehn MJ
中科院分区:
生物学1区
文献类型:
--
作者:
Kulp A;Kuehn MJ

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革兰氏阴性菌产生含有生物活性蛋白质的外膜囊泡(OMV),并执行各种生物过程。与其他分泌机制不同,OMV使细菌能够分泌除可溶性物质之外的不溶性分子以及与可溶性物质复合的不溶性分子。OMV允许酶以浓缩的、受保护的和靶向的形式到达远处的靶标。OMV也在细菌存活中发挥作用:它们的产生是细菌的应激反应,对营养获取、生物膜发育和发病机制很重要。OMV生物发生的关键特征包括缺乏膜-肽聚糖键的区域向外凸出,上调囊泡产生而不损失外膜完整性的能力,某些蛋白质和脂质的富集或排除,以及在没有来自ATP/GTP水解的直接能量的情况下的膜分裂。不同生物学领域的相似出芽机制的比较为评价外膜囊泡形成机制提供了新的见解。
Gram-negative bacteria produce outer membrane vesicles (OMVs) that contain biologically active proteins and perform diverse biological processes. Unlike other secretion mechanisms, OMVs enable bacteria to secrete insoluble molecules in addition to and in complex with soluble material. OMVs allow enzymes to reach distant targets in a concentrated, protected, and targeted form. OMVs also play roles in bacterial survival: Their production is a bacterial stress response and important for nutrient acquisition, biofilm development, and pathogenesis. Key characteristics of OMV biogenesis include outward bulging of areas lacking membrane-peptidoglycan bonds, the capacity to upregulate vesicle production without also losing outer membrane integrity, enrichment or exclusion of certain proteins and lipids, and membrane fission without direct energy from ATP/GTP hydrolysis. Comparisons of similar budding mechanisms from diverse biological domains have provided new insight into evaluating mechanisms for outer membrane vesiculation.
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