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Secretion of human interferon alpha 2b by Streptomyces lividans

机译:链霉菌分泌人干扰素α2b

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摘要

Biologically active human interferon alpha 2b (HuIFNα-2b) was secreted into the culture medium by Streptomyces lividans transformed with recombinant plasmids coding for HuIFNα-2b fused to the Streptomyces exfoliatus M11 lipase A signal sequence. Levels were low, 15 or 100 ng/ml, depending on the plasmid used. Neither processed nor unprocessed HuIFNα-2b was detected in cell lysates of the transformants secreting the recombinant product. However, the secreted recombinant product was found to partially degrade when cultures reached the stationary phase by the action of an, as yet, unidentified mycelium-associated factor. Experimental evidence suggests that the degrading factor is related to mycelium-associated proteolytic activity.
机译:具有生物活性的人干扰素α2b(HuIFNα-2b)通过被编码与融合链霉菌M11脂肪酶A信号序列融合的编码HuIFNα-2b的重组质粒转化的轻链链霉菌分泌到培养基中。根据所使用的质粒,水平较低,为15或100 ng / ml。在分泌重组产物的转化子的细胞裂解物中未检测到已加工或未加工的HuIFNα-2b。然而,当培养物到达静止期时,由于尚未确定的菌丝体相关因子的作用,发现分泌的重组产物部分降解。实验证据表明,降解因子与菌丝体相关的蛋白水解活性有关。

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  • 来源
    《Applied Microbiology and Biotechnology》 |2002年第2期|189-194|共6页
  • 作者单位

    Departamento de Biotecnología Centro de Química Farmacéutica Apdo 16042 Atabey Ciudad de la Habana Cuba;

    Laboratorio de Genética Centro Nacional de Investigaciones Científicas Apdo 6990 Ciudad de la Habana Cuba;

    Departamento de Control de Procesos Centro de Ingeniería Genética y Biotecnología Apdo 6162 Ciudad de la Habana Cuba;

    Departamento de Biotecnología Centro de Química Farmacéutica Apdo 16042 Atabey Ciudad de la Habana Cuba;

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