T7 RNA POLYMERASE VARIANTS WITH CYSTEINE-SERINE SUBSTITUTIONS
    3.
    发明申请
    T7 RNA POLYMERASE VARIANTS WITH CYSTEINE-SERINE SUBSTITUTIONS 审中-公开
    T7 RNA聚合酶与CYSTEINE-丝氨酸取代的变体

    公开(公告)号:US20120252071A1

    公开(公告)日:2012-10-04

    申请号:US13436110

    申请日:2012-03-30

    IPC分类号: C12P19/34 C12N9/12

    CPC分类号: C12N9/1247 C12Y207/07006

    摘要: The present disclosure provide novel variants of T7 RNA polymerase. Embodiments of T7 variants, according to the instant invention, include a Cysteine-Serine substitution on position 723 of the amino acid sequence of the T7 polypeptide. Embodiments of T7 variants according to the instant invention have a DNA-dependent RNA polymerase enzymatic activity and a reduced tendency to form intramolecular homodimers by way of oxidizing thiol groups. The amino acid substitutions within the T7 variants disclosed herein impact minimally, if at all, the RNA polymerase activity of the T7 polypeptide. Further, the mutations of the disclosed embodiments may optionally be combined with mutations which provide enhanced thermostability compared to the wild-type reference.

    摘要翻译: 本公开提供了T7RNA聚合酶的新变体。 根据本发明的T7变体的实施方案包括T7多肽的氨基酸序列的位置723上的半胱氨酸 - 丝氨酸取代。 根据本发明的T7变体的实施方案具有DNA依赖性RNA聚合酶酶活性,并且通过氧化硫醇基形成分子内同型二聚体的趋势降低。 本文公开的T7变体内的氨基酸取代最小程度地影响T7多肽的RNA聚合酶活性。 此外,所公开的实施方案的突变可以任选地与与野生型参考物相比提供增强的热稳定性的突变组合。