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    • 6. 发明公开
    • Glucoamylase cDNA
    • 葡糖淀粉酶cDNA
    • EP0126206A3
    • 1985-03-06
    • EP84100834
    • 1984-01-26
    • CETUS CORPORATION
    • Nunberg, Jack H.Flatgaard, Jeffrey E.Innis, Michael AlanGelfand, David HarrowMeade, James Henry
    • C12N15/00C12P21/02C07C103/52C07H21/04C12P07/06C12N09/34C12N01/16C12R01/85
    • C12N9/2428C07K2319/02C07K2319/036C12N15/10C12N15/70C12N15/81C12P7/06Y02E50/17
    • A gene having a DNA sequence complementary to that of the glucoamylase polypeptide mRNA from a fungal species, preferably Aspergillus awamori, is prepared. The mRNA is an approximately 2.2 kilobase poly a RNA obtained from fungal cells grown under conditions of glucoamylase induction. Reverse transcription of the mRNA provides a glucoamylase probe used to identify genomic digest fragments containing glucoamylase gene regions, which are sequenced to locate the introns and exons. The genomic fragments are spliced together to form a gene having a DNA sequence with altered or deleted introns which codes for fungal glucoamylase protein and is capable, when correctly combined with a cleaved DNA expression vector, of expressing a non-native protein having glucoamylase enzyme activity upon transformation of a host organism by the vector. The host organism is preferably a bacterium or a yeast. The transformed host organism may be used to produce ethanol.
    • 制备具有与来自真菌物种,优选泡盛曲霉的葡糖淀粉酶多肽mRNA互补的DNA序列的基因。 mRNA是从在葡糖淀粉酶诱导条件下生长的真菌细胞获得的约2.2千碱基多聚RNA。 mRNA的逆转录提供了用于鉴定含有葡糖淀粉酶基因区域的基因组消化片段的葡糖淀粉酶探针,其被测序以定位内含子和外显子。 将基因组片段拼接在一起以形成具有编码真菌葡糖淀粉酶蛋白并具有改变或缺失的内含子的DNA序列的基因,并且当其与切割的DNA表达载体正确结合时能够表达具有葡糖淀粉酶酶活性的非天然蛋白 通过载体转化宿主生物体。 宿主生物优选为细菌或酵母。 转化的宿主生物体可用于生产乙醇。