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    • 4. 发明申请
    • NOVEL STARCHES VIA MODIFICATION OF EXPRESSION OF STARCH BIOSYNTHETIC ENZYME GENES
    • 通过淀粉酶生物合成酶基因表达修饰的新方法
    • WO1997022703A2
    • 1997-06-26
    • PCT/US1996019678
    • 1996-12-12
    • E.I. DU PONT DE NEMOURS AND COMPANYHUBBARD, Natalie, LouiseKLEIN, Theodore, MitchellBROGLIE, Karen, E.
    • E.I. DU PONT DE NEMOURS AND COMPANY
    • C12N15/54
    • C12N9/107A23L29/212C12N15/8245
    • The instant invention discloses utilization of a cDNA clone to construct sense and antisense genes for inhibition of starch branching enzyme enzymatic activity in corn. More specifically, this invention concerns a method of controlling the starch fine structure of starch derived from the grain of corn comprising: (1) preparing a chimeric gene comprising a nucleic acid fragment encoding a starch branching enzyme structural gene or a fragment thereof, operably linked in either sense or antisense orientation on the upstream side to a nucleic acid fragment encoding a promoter that directs gene expression in corn endosperm tissue, and operably linked on the downstream side to a nucleic acid fragment encoding a suitable regulatory sequence for transcriptional termination, and (2) transforming corn with said chimeric gene, wherein expression of said chimeric gene results in alteration of the fine structure of starch derived from the grain of said transformed corn compared to the fine structure of starch derived from corn not possessing said chimeric gene.
    • 本发明公开了利用cDNA克隆构建用于抑制玉米淀粉分支酶酶活性的有义和反义基因。 更具体地说,本发明涉及一种控制来自玉米粒的淀粉的淀粉精细结构的方法,包括:(1)制备嵌合基因,其包含编码淀粉分支酶结构基因或其片段的核酸片段,其可操作地连接 在上游侧的任何正义或反义方向,编码引导玉米胚乳组织中的基因表达的启动子的核酸片段,并且在下游侧可操作地连接到编码转录终止的合适调控序列的核酸片段,和( 2)用所述嵌合基因转化玉米,其中所述嵌合基因的表达导致衍生自所述转化玉米的淀粉的淀粉的精细结构的改变与源自不具有所述嵌合基因的玉米的淀粉的精细结构相反。