T7 RNA POLYMERASE VARIANTS WITH CYSTEINE-SERINE SUBSTITUTIONS
    11.
    发明申请
    T7 RNA POLYMERASE VARIANTS WITH CYSTEINE-SERINE SUBSTITUTIONS 有权
    T7 RNA聚合酶与CYSTEINE-丝氨酸取代的变体

    公开(公告)号:US20160010069A1

    公开(公告)日:2016-01-14

    申请号:US14872392

    申请日:2015-10-01

    CPC classification number: C12N9/1247 C12Y207/07006

    Abstract: 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.

    Abstract translation: 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。

    Recombinant negative strand RNA virus expression system and vacccines
    13.
    发明申请
    Recombinant negative strand RNA virus expression system and vacccines 审中-公开
    重组负链RNA病毒表达系统和疫苗

    公开(公告)号:US20060019350A1

    公开(公告)日:2006-01-26

    申请号:US11244119

    申请日:2005-10-04

    Abstract: Recombinant negative-strand viral RNA templates are described which may be used with purified RNA-directed RNA polymerase complex to express heterologous gene products in appropriate host cells and/or to rescue the heterologous gene in virus particles. The RNA templates are prepared by transcription of appropriate DNA sequences with a DNA-directed RNA polymerase. The resulting RNA templates are of the negative-polarity and contain appropriate terminal sequences which enable the viral RNA-synthesizing apparatus to recognize the template. Bicistronic mRNAs can be constructed to permit internal initiation of translation of viral sequences and allow for the expression of foreign protein coding sequences from the regular terminal initiation site, or vice versa

    Abstract translation: 描述了重组负链病毒RNA模板,其可以与纯化的RNA定向RNA聚合酶复合物一起使用以在合适的宿主细胞中表达异源基因产物和/或拯救病毒颗粒中的异源基因。 通过用DNA指导的RNA聚合酶转录适当的DNA序列来制备RNA模板。 得到的RNA模板是负极性的并且含有适当的末端序列,使得病毒RNA合成装置可以识别模板。 可以构建双顺反子mRNA以允许内部引发病毒序列的翻译,并允许外源蛋白编码序列从常规终止起始位点的表达,反之亦然

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