The invention relates to an anti fat polysaccharide factor of three warts and a preparation method and application, relating to the genetic engineering of the three wart crab, the gene sequence of the anti fat polysaccharide factor of the three warts, as shown by SEQ NO.1; the invention also provides a method for preparing the anti fat polysaccharide factor of the three wart crab, which is characterized by the following steps. Sudden: (1) construct the recombinant expression vector of anti fat polysaccharide factor of Portunus three; (2) the recombinant expression vector of step (1) was introduced into the host cell, and the host cell was induced and expressed, and the expression product was obtained. (3) the recombinant protein was obtained from the purification step (2), and the recombinant protein was obtained, that is, the anti fat polysaccharide factor of the shuttle three of the shuttle crab. Compared with the existing technology, the present invention has the following advantages: the anti fat polysaccharide factor may be widely involved in the innate immune response to the anti microbial infection of the three verruca verruca, and the recombinant protein shows an attractive prospect in the development of animal feed additive and the development of new antiviral drugs.
【技术实现步骤摘要】
一种三疣梭子蟹抗脂多糖因子及其制备方法和应用
本专利技术涉及分子生物学领域,尤其涉及一种三疣梭子蟹抗脂多糖因子及其重组蛋白制备方法和应用。
技术介绍
三疣梭子蟹(Portunustrituberculatus)是一种重要的海产经济蟹类,由于其营养丰富、生长迅速等优点,已成为我国重要海水养殖品种。但随着养殖规模不断扩大以及集约化程度不断提高,由细菌、真菌等引起的多种疾病在三疣梭子蟹养殖群体中频频爆发,造成了巨大的经济损失,严重制约了三疣梭子蟹养殖产业的健康可持续发展。目前蟹病的防治仍主要采用传统抗生素药物防治,但长期盲目滥用药物,容易造成耐药性等问题,导致产品质量下降,环境污染及对人类健康构成潜在威胁等不良后果。因此,这就迫切需要从三疣梭子蟹自身的免疫防御因子入手研究其抗病机制和开发新型的抗菌药物进行免疫防治。抗脂多糖因子(ALF)是一种能够结合脂多糖(LPS)并中和其毒性作用的小分子抗菌肽,因其作用机制与传统抗生素不同,细菌不易产生耐药性,对正常真核细胞无毒害,日益受到广泛关注。ALF最初是从鲎中发现,它可以结合LPS,并对R型革兰氏阴性菌有明显的抑制生长作用。晶体结构分析表明,鲎ALF结构中有两个高度保守的半胱氨酸残基,它们形成二硫键所限制的β折叠区域即为LPS结合域。体外合成鲎ALF的LPS结合域,证明其确实可以与LPS结合,能够在体外调节细胞因子的分泌,有助于保护小鼠免受内毒素的攻击。随后,从对虾、螯虾、蟹等甲壳动物中也鉴定或克隆出多种抗脂多糖因子。研究表明这些甲壳动物ALF的表达水平在细菌刺激后明显上调,其重组蛋白能够抑制革兰氏阴性菌和革兰氏阳性菌 ...
【技术保护点】
1.一种三疣梭子蟹抗脂多糖因子,其特征在于:所述三疣梭子蟹抗脂多糖因子的基因序列如SEQ NO.1所示。
【技术特征摘要】
1.一种三疣梭子蟹抗脂多糖因子,其特征在于:所述三疣梭子蟹抗脂多糖因子的基因序列如SEQNO.1所示。2.根据权利要求1所述的三疣梭子蟹抗脂多糖因子,其特征在于所述的三疣梭子蟹抗脂多糖的氨基酸序列为MetSerArgIleSerLeuLeuLeuValLeuLeuSerIleValLeuValAlaProSerGlnAspTyrLeuLysGluGluLeuPheAsnGluValLysAspAlaLeuPheAspPheGlyAlaIleGluIleLeuAspArgValCysAsnTyrArgValMetProArgPheGluAsnTrpArgPheTyrPheLysGlyAspValTrpCysProGlyTrpThrPheIleLysGlyGluSerLeu。3.一种制备如权利要...
【专利技术属性】
技术研发人员:吴晓东,母昌考,王春琳,宋微微,李荣华,刘磊,史策,叶央芳,
申请(专利权)人:宁波大学,
类型:发明
国别省市:浙江,33
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。