Biogenesis of bacterial membrane vesicles.

Biogenesis of bacterial membrane vesicles.
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DOI:
10.1111/j.1365-2958.2009.06731.x
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发表时间:
2009-06
影响因子:
3.6
通讯作者:
Cookson BT
Cookson BT
中科院分区:
生物学2区
文献类型:
--
作者:
Deatherage BL;Lara JC;Bergsbaken T;Rassoulian Barrett SL;Lara S;Cookson BT

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膜囊泡(MV)的释放仍然是不确定的,尽管它的保护之间复制革兰氏阴性菌在体外和体内。在沙门氏菌MV中鉴定的蛋白质,来源于包膜,通过特定的限定结构域控制MV的产生,所述结构域促进包膜结构内的外膜蛋白-肽聚糖(OM-PG)和OM蛋白-内膜蛋白(OM-PG-IM)相互作用。OM-PG和OM-PG-IM相互作用的调节沿着细胞体和分裂隔膜,分别保持膜的完整性,同时协调具有不同大小分布和蛋白质含量的MV的局部释放。这些数据支持MV生物发生的模型,其中细菌生长和分裂引起包膜结构内OM-PG和OM-PG-IM缔合的密度的暂时的局部降低,从而释放外膜作为MV。
Membrane vesicle (MV) release remains undefined, despite its conservation among replicating Gram-negative bacteria both in vitro and in vivo. Proteins identified in Salmonella MVs, derived from the envelope, control MV production via specific defined domains that promote outer membrane protein-peptidoglycan (OM-PG) and OM protein-inner membrane protein (OM-PG-IM) interactions within the envelope structure. Modulation of OM-PG and OM-PG-IM interactions along the cell body and at division septa, respectively, maintains membrane integrity while coordinating localized release of MVs with distinct size distribution and protein content. These data support a model of MV biogenesis, wherein bacterial growth and division invoke temporary, localized reductions in the density of OM-PG and OM-PG-IM associations within the envelope structure, thus releasing outer membrane as MVs.
DOI: 10.1128/jb.130.2.781-786.1977
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