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    • 5. 发明授权
    • Yeast host, transformant and method for producing heterologous proteins
    • 酵母宿主,转化体和产生异源蛋白质的方法
    • US08329448B2
    • 2012-12-11
    • US12025138
    • 2008-02-04
    • Alimjan IdirisHideki TohdaYuko Hama
    • Alimjan IdirisHideki TohdaYuko Hama
    • C12N1/16C12N1/19C12N15/09C12N15/12C12N15/16C12N15/18C12N15/81
    • C12N15/815C07K14/61C12P21/02
    • The efficiency of production of a heterologous protein by a transformant of a yeast host is improved.A method of constructing a host for expression of a foreign gene which comprises deleting or inactivating at least one gene selected from the protease-associated genes (especially, metalloprotease genes and serine protease genes) of Schizosaccharomyces pombe, a host in which the above-mentioned gene is deleted or inactivated, a transformant obtained by introducing a foreign gene into the host and a method of producing a heterologous protein using the transformant.The protease-associated gene is at least one gene selected from the group consisting of psp3 (SPAC1006.01), is sxa2 (SPAC1296.03c), ppp51 (SPAC22G7.01c) and ppp52 (SPBC18A7.01) or at least two genes selected from the group consisting of metalloprotease genes and serine protease genes, especially, three genes psp3 (SPAC1006.01), isp6 (SPAC4A8.04) and ppp53 (SPAP14E8.04). A host in which four genes consisting of the above three genes and ppp16 (SPBC1711.12), or five genes consisting of the above four genes and ppp22 (SPBC14C8.03) are deleted or inactivated is preferred.
    • 通过酵母宿主的转化体产生异源蛋白质的效率得到改善。 构建用于表达外源基因的宿主的方法,其包括删除或失活选自粟酒裂殖酵母的蛋白酶相关基因(特别是金属蛋白酶基因和丝氨酸蛋白酶基因)中的至少一种基因,其中上述 基因被缺失或失活,通过将外源基因导入宿主获得的转化体和使用转化体产生异源蛋白质的方法。 蛋白酶相关基因是选自psp3(SPAC1006.01),sxa2(SPAC1296.03c),ppp51(SPAC22G7.01c)和ppp52(SPBC18A7.01)中的至少一种基因或选自至少两种基因 来自由金属蛋白酶基因和丝氨酸蛋白酶基因组成的组,特别是3个基因psp3(SPAC1006.01),isp6(SPAC4A8.04)和ppp53(SPAP14E8.04)。 优选缺失或失活的由以上三种基因组成的四种基因和ppp16(SPBC1711.12)或由上述四种基因组成的五种基因和ppp22(SPBC14C8.03)的宿主。