Restriction/modification polypeptides, polynucleotides, and methods
    35.
    发明授权
    Restriction/modification polypeptides, polynucleotides, and methods 有权
    限制/修饰多肽,多核苷酸和方法

    公开(公告)号:US08962333B2

    公开(公告)日:2015-02-24

    申请号:US13439069

    申请日:2012-04-04

    Abstract: The present invention relates to the discovery of a novel restriction/modification system in Caldicellulosiruptor bescii. The discovered restriction enzyme is a HaeIII-like restriction enzyme that possesses a thermophilic activity profile. The restriction/modification system also includes a methyltransferase, M.CbeI, that methylates at least one cytosine residue in the CbeI recognition sequence to m4C. Thus, the invention provides, in various aspects, isolated CbeI or M.CbeI polypeptides, or biologically active fragments thereof; isolated polynucleotides that encode the CbeI or M.CbeI polypeptides or biologically active fragments thereof, including expression vectors that include such polynucleotide sequences; methods of digesting DNA using a CbeI polypeptide; methods of treating a DNA molecule using a M.CbeI polypeptide; and methods of transforming a Caldicellulosiruptor cell.

    Abstract translation: 本发明涉及在Caldicellulosiruptor bescii中发现新的限制/修饰系统。 所发现的限制酶是具有嗜热活性分布的HaeIII样限制酶。 限制/修饰系统还包括甲基转移酶M.CbeI,其将CbeI识别序列中的至少一个胞嘧啶残基甲基化为m4C。 因此,本发明在各个方面提供了分离的CbeI或M.CbeI多肽或其生物活性片段; 编码CbeI或M.CbeI多肽或其生物活性片段的分离的多核苷酸,包括包括这种多核苷酸序列的表达载体; 使用CbeI多肽消化DNA的方法; 使用M.CbeI多肽处理DNA分子的方法; 和转化Caldicellulosiruptor细胞的方法。

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