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首页> 外文期刊>Parasitology >Identification and characterization of a novel specific secreted protein family for selected members of the subfamily Ostertagiinae (Nematoda)
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Identification and characterization of a novel specific secreted protein family for selected members of the subfamily Ostertagiinae (Nematoda)

机译:用于亚家族oostertagiinae(奈塔罗大)的所选成员的新型特异性分泌蛋白家族的鉴定和表征

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摘要

It has been shown that the bovine abomasal parasite, Ostertagia ostertagi, drastically modulates its microenvironment, causing epithelial cell damage, accumulation of inflammatory cells and pH changes in the stomach. The mechanisms used by the parasite to change the abomasal environment are largely unknown, but an important role has been attributed to excretory-secretory (ES) products from the parasite. In this study we have identified proteins representing a novel ES protein family, characterized by the SCP/Tpx-l/Ag5/PR-l/Sc7 protein motif. These proteins were named Oo-ALl and Oo-AL2 (O. ostertagi ASP-like protein). Both proteins contain a signal peptide and 1 predicted N-glycosylation site. The transcript for Oo-ALl was present from the L4 stage onwards in both male and female adult worms, whereas the Oo-AL2 transcript was hardly detectable. Western blots of somatic extracts and ES products from different developmental stages of O. ostertagi, probed with anti-Oo-ALl antibodies, revealed Oo-AL proteins in the ES products of adult worms. An analysis of the nematode genome and EST databases indicated that these novel ES proteins are unique to O. ostertagi and its relative, Teladorsagia circumcincta, suggesting a key function in these abomasal parasites.
机译:已经表明,牛脱蒿寄生虫Ostertagia Ostertagi急剧调节其微环境,导致上皮细胞损伤,炎症细胞的积累和胃的pH变化。寄生虫改变脱毛环境的机制很大程度上是未知的,但是寄生虫的排泄物分泌产物归因于来自寄生虫的重要作用。在该研究中,我们已经确定了代表新型ES蛋白质家族的蛋白质,其特征在于SCP / TPX-L / AG5 / PR-L / SC7蛋白质基序。这些蛋白质被命名为OO-全部和OO-AL2(O.ostertagi ASP样蛋白)。两种蛋白质含有信号肽和1个预测的N-糖基化位点。 OO-的转录物在雄性和雌性成年蠕虫中从L4阶段出现,而OO-Al2转录物难以检测到。来自Ostertagi的不同发育阶段的细胞提取物和ES产品的蛋白质印迹,探讨了抗OO-所有抗体,揭示了成年蠕虫的ES产品中的OO-Al蛋白。对线虫基因组和EST数据库的分析表明,这些新型ES蛋白是O. Orttertagi及其亲属,Teladorsagia Clowcincta独有的,这表明这些寄生虫寄生虫的关键功能。

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