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    • 4. 发明申请
    • MODIFIED LECTIN DERIVED FROM WISTERIA FLORIBUNDA
    • 来自WISTERIA FLORIBUNDA的改良的LECTIN
    • US20150329602A1
    • 2015-11-19
    • US14654223
    • 2013-12-18
    • NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    • Takashi SatoYasunori ChibaHiroaki TatenoHiroyuki KajiMasanori GotoHisashi Narimatsu
    • C07K14/42G01N33/53
    • C07K14/42G01N33/5308G01N2333/42G01N2400/00
    • [Problem] The purpose of the present invention is to stably supply high-quality and highly uniform Wisteria floribunda agglutinin (WFA) that recognizes biologically important sugar-chain markers, to elucidate the sugar-chain recognition activity in detail, and to furthermore increase the specificity of the sugar-chain recognition activity. [Solution] The present invention involves the development of a technique for cloning genes for coding Wisteria floribunda agglutinin (WFA) and producing recombinant WFA having the same sugar-chain recognition activity as natural WFA from transformed bacteria. Natural WFA is reduced to thereby manufacture a reduced WFA monomer for specifically recognizing terminal GalNAc residue. A recombinant monomer WFA for recognizing LDN (GalNAcβ1, 4GlcNAc) sugar chain, which is important as a diagnostic marker among sugar chains having a terminal GalNAc residue, is manufactured by introducing cysteine mutation to recombinant WFA or by C-terminal-side amino acid deletion.
    • [问题]本发明的目的是稳定地提供识别生物重要的糖链标记物的高品质和高度均匀的紫藤凝集素(WFA),以详细阐明糖链识别活性,并进一步增加 糖链识别活性的特异性。 [解决方案]本发明涉及开发克隆用于编码Wisteria floribunda凝集素(WFA)的基因的克隆技术,并且生产与来自转化细菌的天然WFA具有相同糖链识别活性的重组WFA。 减少天然WFA,从而制造用于特异性识别末端GalNAc残基的还原的WFA单体。 通过将半胱氨酸突变引入重组WFA或C末端侧氨基酸来制备重要单体WFA,其用于识别LDN(GalNAc&bgr; 1,4GlcNAc)糖链,其作为具有末端GalNAc残基的糖链中的诊断标记是重要的 酸缺失。
    • 8. 发明授权
    • Complex type sugar chain hydrolase
    • 复合型糖链水解酶
    • US09371519B2
    • 2016-06-21
    • US14349569
    • 2012-10-03
    • National Institute of Advanced Industrial Science and Technology
    • Yasunori ChibaSatoshi MurakamiHisashi Narimatsu
    • C12N9/24C12N9/42C12P21/00
    • C12N9/2434C12N9/2402C12P21/005C12Y302/01052C12Y302/01096Y02P20/52
    • The present invention provides a novel endo-β-N-acetylglucosaminidase (Endo-Om) using a transformant produced by cloning an endo-β-N-acetylglucosaminidase (Endo-Om) gene originated from a methylotrophic yeast Ogataea minuta IFO10746 strain. The Endo-Om according to the present invention has a specific activity 13-fold higher than that of known Endo-M and a Vmax value 55-fold higher than that of the known Endo-M, and is useful for the analysis of the structures of sugar chains, including complex type sugar chains, in glycoproteins and the modification of the sugar chains. Also provided are an endo-β-N-acetylglucosaminidase (Endo-Cp), an endo-β-N-acetylglucosaminidase (Endo-Pa) and an endo-β-N-acetylglucosamimidase (Endo Zr) which are produced from Candida parapolymorpha DL-1 ATCC26012 strain, Pichia anomala ATCC36904 strain and Zygosaccharomyces rouxii ATCC2623 strain, respectively, on the basis of an Endo-Om gene sequence, and each of which has a similar level of complex type sugar chain cleavage activity and a similar level of complex type sugar chain transfer activity to those of Endo-Om.
    • 本发明提供了一种利用克隆衍生于甲基营养酵母Ogataea minuta IFO10746菌株的内切-G-乙酰氨基葡萄糖苷酶(Endo-Om)基因产生的转化体的新型内切-N-乙酰氨基葡糖苷酶(Endo-Om)。 根据本发明的内消旋体具有比已知Endo-M高13倍的比活性,和比已知Endo-M高55倍的Vmax值,并且可用于分析结构 的糖链,包括复合型糖链,糖蛋白和糖链的修饰。 还提供了内源性N-乙酰氨基葡萄糖苷酶(Endo-Cp),内含量 - 乙酰氨基葡糖苷酶(Endo-Pa)和内含量 - 乙酰葡糖苷酶(Endo Zr),其由 基于Endo-Om基因序列,分别具有类似水平的复合型糖链切割活性和类似水平的Paradolymorpha DL-1 ATCC26012菌株,异
      毕赤酵母ATCC36904菌株和接合酵母属(Lygosaccharomyces rouxii)ATCC2623菌株 的复合型糖链转移活性与Endo-Om的活性。