Pseudomonas aeruginosa Type III Secretory Toxin ExoU and Its Predicted Homologs.

Pseudomonas aeruginosa Type III Secretory Toxin ExoU and Its Predicted Homologs.
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DOI:
10.3390/toxins8110307
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发表时间:
2016-10-26
期刊:
影响因子:
4.2
通讯作者:
Kato H
Kato H
中科院分区:
医学2区
文献类型:
--
作者:
Sawa T;Hamaoka S;Kinoshita M;Kainuma A;Naito Y;Akiyama K;Kato H

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铜绿假单胞菌ExoU是一种III型分泌性毒素,具有Patatin样磷脂酶活性,是免疫低下患者急性肺损伤和脓毒症的主要致病因子。通过使用最近更新的细菌基因组数据库,预测与Ps同源的蛋白质序列。铜绿假单胞菌ExoU在其他17种假单胞菌(P.荧光素,Ps.Lundensis,P.Weihenstephanensis,P.边角菌,Ps.Ropsiaae,P.Synxantha,Ps.Libanens,P.Extremaustris,Ps.Veronii,Ps.Simiae,Ps.Trivialis,Ps.Tolaasii,Ps.Orientalis、P.Taetroens,Ps.紫丁香科(Syringae)、紫丁香属(P.Viridivisa和P.来自其他三个属的8个革兰氏阴性细菌(火杆菌属、气单胞菌属和帕鲁迪杆菌属)。在用于系统发育分析的预测初级氨基酸序列的比对中,在不同物种中发现了毒素的高度保守和非保守部分。对预测的ExoU同源物的进一步比较研究应该会为我们提供关于Ps独特特征的更详细的信息。铜绿假单胞菌外毒素。
Pseudomonas aeruginosa ExoU, a type III secretory toxin and major virulence factor with patatin-like phospholipase activity, is responsible for acute lung injury and sepsis in immunocompromised patients. Through use of a recently updated bacterial genome database, protein sequences predicted to be homologous to Ps. aeruginosa ExoU were identified in 17 other Pseudomonas species (Ps. fluorescens, Ps. lundensis, Ps. weihenstephanensis, Ps. marginalis, Ps. rhodesiae, Ps. synxantha, Ps. libanensis, Ps. extremaustralis, Ps. veronii, Ps. simiae, Ps. trivialis, Ps. tolaasii, Ps. orientalis, Ps. taetrolens, Ps. syringae, Ps. viridiflava, and Ps. cannabina) and 8 Gram-negative bacteria from three other genera (Photorhabdus, Aeromonas, and Paludibacterium). In the alignment of the predicted primary amino acid sequences used for the phylogenetic analyses, both highly conserved and nonconserved parts of the toxin were discovered among the various species. Further comparative studies of the predicted ExoU homologs should provide us with more detailed information about the unique characteristics of the Ps. aeruginosa ExoU toxin.
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