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    • 3. 发明授权
    • T7 expression system
    • T7表达系统
    • US09163246B2
    • 2015-10-20
    • US12672606
    • 2008-08-08
    • Wayne Barnes
    • Wayne Barnes
    • C07H21/04C12N9/00C12N15/63C12N15/70
    • C12N15/63C12N15/70
    • The present invention provides an improved prokaryotic cell expression system employing a tightly controlled host strain construct that controls uninduced, leaky expression of proteins while still auto-inducing well. Various aspects of the present invention address and overcome the problem of uninduced basal expression by providing a host strain that comprises a T7 polymerase gene, and mutants thereof, inserted between lac Z and lac Y of the lac operon (a “ZRY” construct), downstream of an otherwise wild-type lac operon control region.
    • 本发明提供改进的原核细胞表达系统,其采用严格控制的宿主菌株构建体,其控制蛋白质的未诱导的,泄漏的表达,同时仍然自动诱导。 本发明的各个方面通过提供插入lac操纵子的lacZ和lacY(“ZRY”构型)的T7聚合酶基因及其突变体的宿主菌株来解决和克服未诱导的基础表达的问题, 在野生型lac操纵子控制区域的下游。