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    • 1. 发明授权
    • E. coli and Streptomyces host cells that contain MatBC genes or E. coli host cells that contain pcc genes useful for enhanced polyketide production
    • 含有MatBC基因的大肠杆菌和链霉菌宿主细胞或含有用于增强聚酮生产的pcc基因的大肠杆菌宿主细胞
    • US06939691B1
    • 2005-09-06
    • US09687855
    • 2000-10-13
    • Chaitan KhoslaBlaine Pfeifer
    • Chaitan KhoslaBlaine Pfeifer
    • C12N9/00C12N9/12C12N9/88C12N15/52C12P1/00C12P11/00C12P17/08C12P17/18C12P19/62
    • C12N15/52C12N9/1288C12N9/88C12N9/93C12P17/08
    • The use of enzymes that catalyze the production of starter and extender units for polyketides in E. coli and Streptomyces is described; these enzymes include malonyl CoA decarboxylase (MatA), malonyl CoA synthetase (MatB), and a malonate transporter (MatC) as well as proprionyl CoA carboxylase (pcc). The matBC gene from Streptomyces coelicolor, the matABC genes from Rhizobium trifoli, and the pccB and accA2 from Streptomyces coelicolor are useful in specific embodiments of the claimed invention. These enzymes may be used to enhance the yield of polyketides that are natively produced or polyketides that are rationally designed. By using these techniques, the synthesis of a complete polyketide has been achieved in E. coli in the presence of a phosphopantetheinyl transferase, such as sfp from Bacillus subtilis. This achievement permits a host organism with desirable characteristics to be used in the production of such polyketides and to assess the results of gene shuffling.
    • 描述了在大肠杆菌和链霉菌中使用催化生成起始物的酶和聚酮化合物的增量单元; 这些酶包括丙二酰辅酶A脱羧酶(MatA),丙二酰辅酶A合成酶(MatB)和丙二酸转运蛋白(MatC)以及丙酰CoA羧化酶(pcc)。 来自Streptomyces coelicolor的matBC基因,来自根瘤菌根瘤菌的matABC基因和来自天蓝链霉菌的pccB和accA2可用于要求保护的发明的具体实施方案中。 这些酶可用于增强天然产生的聚酮化合物或合理设计的聚酮化合物的产率。 通过使用这些技术,在磷酸泛酰乙酰转移酶(例如来自枯草芽孢杆菌的sfp)的存在下,在大肠杆菌中已经完成了完整的聚酮化合物的合成。 该成就允许具有所需特征的宿主生物体用于生产这种聚酮化合物并评估基因改组的结果。