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    • 4. 发明授权
    • Process for producing peptides in E. coli
    • 在大肠杆菌中生产肽的方法
    • US5670340A
    • 1997-09-23
    • US352179
    • 1994-12-05
    • Masayuki YabutaYuji SuzukiKazuhiro OhsuyeTakehiro OshimaSeiko OnaiKoji MagotaShoji Tanaka
    • Masayuki YabutaYuji SuzukiKazuhiro OhsuyeTakehiro OshimaSeiko OnaiKoji MagotaShoji Tanaka
    • C12N15/09C07K14/58C07K14/585C12N9/38C12N15/16C12N15/62C12N15/67C12N15/70C12P21/02C12P21/06C12R1/19C12P21/00
    • C07K14/58C07K14/585C12N15/62C12N9/2471C12Y302/01023C07K2319/00C07K2319/23C07K2319/43C07K2319/50C07K2319/75C07K2319/90
    • The present invention is a process to express a target peptide in a large amount and accumulate the target peptide in host cells in the form of inclusion bodies. The process comprises: A) culturing host cells transformed with a plasmid able to express a gene coding for a fusion protein represented in the formula A--L--B, wherein B is a target peptide, A is a protective peptide comprising a 90-210 amino acid fragment E. coli .beta.-galactosidase, and L is a linker peptide positioned between the C-terminus of the protective peptide and the N-terminus of the target peptide and selected so that when the fusion protein is treated by an enzyme or chemical substance, the target peptide is separated, and wherein the protective peptide and linker peptide are selected so that the isoelectric point of the fusion protein in between 4.9 and 6.9; B) obtaining an insoluble fraction comprising inclusion bodies by homogenization of th cultured transformed cells; C) solubilizing the fusion protein in the inclusion bodies by treatment of the insoluble fraction with a solubilizing agent; and, D) cleaving the peptide bond between the C-terminus of the linker peptide and the N-terminus of the target peptide of the solubilized fusion protein to release the target peptide from the other peptides followed by purification of the target peptide.
    • 本发明是大量表达目标肽并以包涵体的形式在宿主细胞中聚集靶肽的方法。 该方法包括:A)培养用能够表达编码式ALB中表示的融合蛋白的基因的质粒转化的宿主细胞,其中B是靶肽,A是包含90-210个氨基酸片段E的保护肽 大肠杆菌β-半乳糖苷酶,L是位于保护肽的C-末端和靶肽的N末端之间的连接肽,并且被选择使得当融合蛋白被酶或化学物质处理时,靶 分离肽,并且其中选择保护性肽和接头肽,使得融合蛋白的等电点在4.9和6.9之间; B)通过均质培养的转化细胞获得包含包含体的不溶性级分; C)通过用增溶剂处理不溶性级分将融合蛋白溶解在包涵体中; 并且D)切割接头肽的C末端和溶解的融合蛋白的靶肽的N末端之间的肽键,从其他肽释放靶肽,然后纯化目标肽。
    • 8. 发明授权
    • Process for production of protein
    • 蛋白质生产工艺
    • US6037145A
    • 2000-03-14
    • US523373
    • 1995-09-05
    • Masayuki YabutaKazuhiro Ohsuye
    • Masayuki YabutaKazuhiro Ohsuye
    • C12N1/21C12N9/52C12N15/62C12N15/63
    • C12N9/52C12N15/62C07K2319/00
    • A process for the production of a desired polypeptide comprising the steps of: (1) transforming host cells with an expression vector comprising a gene coding for a fusion protein comprising a desired polypeptide and a protective polypeptide; (2) culturing the transformed host cells so as to express said gene to produce a fusion protein; and (3) excising the desired polypeptide from the fusion protein with a protease intrinsic to the host cells. According to the present invention, a large amount of a desired polypeptide can be produced at a low cost. Especially according to the present invention, a large amount of S. aureus V8 protease can be efficiently produced at low cost using a safe host such as E. coli according to gene recombination procedures.
    • 一种制备所需多肽的方法,包括以下步骤:(1)用包含编码包含所需多肽和保护性多肽的融合蛋白的基因的表达载体转化宿主细胞; (2)培养转化的宿主细胞,以表达所述基因以产生融合蛋白; 和(3)用融合蛋白切割所需的多肽与宿主细胞固有的蛋白酶。 根据本发明,可以低成本生产大量所需的多肽。 特别是根据本发明,可以使用安全宿主如大肠杆菌根据基因重组方法以低成本有效地生产大量的金黄色葡萄球菌V8蛋白酶。