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    • 4. 发明授权
    • Lactic acid bacterial regulatable expression system
    • 乳酸菌可调节表达系统
    • US06133023A
    • 2000-10-17
    • US981601
    • 1997-12-29
    • Soeren Michael MadsenAstrid VrangJose ArnauPeter RavnMads Groenvald JohnsenHans Israelsen
    • Soeren Michael MadsenAstrid VrangJose ArnauPeter RavnMads Groenvald JohnsenHans Israelsen
    • A23L29/00C07K14/35C12N1/21C12N15/31C12N15/74C12N15/00C12N1/20C12N7/00C12P19/34
    • C12N15/746C07K14/35
    • Expression vectors capable of being replicated in lactic acid bacterial cells comprising a promoter region comprising (a) a promoter sequence element the function of which is regulatable by an environmental or growth condition factor and (b) at least one further nucleotide sequence element, the position, orientation, presence and/or sequence of which element has a regulatory effect on the expression of a gene operably linked to the promoter region in which vectors the position, orientation, presence and/or sequence of at least one of said elements (a) or (b) is modified relative to the position, orientation, presence and/or sequence of the corresponding non-modified element whereby the expression of the gene is altered, and a lactic acid bacterium which is transformed with such a vector as defined above are provided. The recombinant cells containing such a regulatable or inducible gene expression system are useful as food or feed starter cultures or as strains for the production of gene products such as pharmaceutically or immunologically active compounds including oligo- or polypeptides derived from a Mycobacterium species including M. tuberculosis.
    • PCT No.PCT / DK97 / 00341 Sec。 371日期1997年12月29日第 102(e)日期1997年12月29日PCT 1997年8月22日PCT公布。 第WO98 / 10079号公报 日期1998年3月12日能够复制在包含启动子区域的乳酸菌细胞中的表达载体包括(a)启动子序列元件,其功能由环境或生长条件因子调节,和(b)至少一个其它核苷酸 序列元件,哪个元件的位置,取向,存在和/或序列对可操作地连接到启动子区的基因的表达具有调节作用,其中载体中的至少一个的位置,取向,存在和/或序列 所述元件(a)或(b)相对于相应的未修饰元件的位置,取向,存在和/或序列被修饰,从而基因的表达被改变,并且用这种 提供了如上所述的载体。 含有这种可调节或可诱导基因表达系统的重组细胞可用作食物或饲料起始培养物或用作产生基因产物的菌株,例如药学或免疫活性化合物,包括衍生自包括结核分枝杆菌在内的分枝杆菌物种的寡肽或多肽 。