Molecular and biochemical characterization of Taenia solium alpha-enolase

文献类型： 外文期刊

第一作者： Zhang, Shaohua

作者： Zhang, Shaohua;You, Yanan;Luo, Xuenong;Zheng, Yadong;Cai, Xuepeng

作者机构：

关键词： Taenia solium; Enolase; Biochemical characterization; Plasminogen binding; Immunolocalization

期刊名称：VETERINARY PARASITOLOGY （ 影响因子：2.738； 五年影响因子：2.951 ）

ISSN： 0304-4017

年卷期： 2018 年 254 卷

页码：

收录情况： SCI

摘要： Enolase (EC 4.2.1.11) acts as a multifunctional enzyme in many organisms, being involved in metabolism, transcription regulation and pathogenesis. In the current study, the recombinant a-enolase from Taenia solium (His-Tseno) was prepared and antiserum against His-Tseno was generated in rabbits. Consequently, we analyzed the enzymatic characteristics, plasminogen binding activity, tissue localization and expression patterns of Tseno. The study demonstrated that the enzymatic activity of His-Tseno was enhanced at pH around 7.0-7.5 and affected by addition of metal ions. Kinetic measurements using 2-phospho-D-glycerate (2-PGA) substrates gave a specific activity of 60.72 +/- 0.84 U/mg and 1.1 mM of Km(2-PGA) value. Plasminogen binding assay showed that His-Tseno could bind to human plasminogen and generate plasmin activated by a tissue-type plasminogen activator (t-PA). In addition, the lysine analogue 6-aminocaproic acid (epsilon-ACA) could inhibit the binding of plasminogen to His-Tseno. Quantitative real-time PCR confirmed that Tseno was expressed 2.38 folds higher in the adult worms (p < 0.05) than in the cysticerci. Further, an immunolocalization assay indicated that native Tseno was mainly distributed in the tegument and eggs of gravid proglottis from adult T. solium. In conclusion, Tseno executes the innate glycolytic function to supply energy for the growth, egg production, and even invasion of T. solium.

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