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    • 127. 发明授权
    • Process for production of restrictocin
    • 生产限释片的方法
    • US5306626A
    • 1994-04-26
    • US32842
    • 1993-03-16
    • John E. Fitton
    • John E. Fitton
    • C07K14/37C07K14/415C12N9/22C12N9/88C12N15/31C12N15/70C12P21/02
    • C12N9/22C07K14/37C07K14/415C12N15/70C12N9/88C07K2319/034C07K2319/55Y10S435/849
    • Methods for recombinant production in procayotic microorganisms such as E. coli of ribotoxins such as restrictocin, alpha-sarcin and mitogillin are described. Known methods were relatively low yielding and not cost effective for commercial use such as in the pharmaceutical industry where relatively large quantities of toxin with consistent batch to batch quality may be required for immunotoxin production. Use of recombinant methods of production open up the possibility of making ribotoxin analogues. Toxicity of ribotoxins was recognised as a concern in development of a high yielding cost effective production method. Methods for high yielding intracellular accumulation or secretion of ribotoxins are described. Use of protease deficient strains and other methods of minimising breakdown of ribotoxin by protease are preferred. Vectors and host strains for use in the methods are described.
    • 描述了在诸如限制性细胞毒素,α-丝氨酸蛋白酶和丝裂霉素的核毒素如大肠杆菌等原生微生物中重组生产的方法。 已知的方法相对低的产率并且在商业上不是成本有效的,例如在制药工业中,对于免疫毒素生产可能需要相对大量的具有一致批次质量的毒素。 使用重组生产方法开辟制作核毒素类似物的可能性。 在开发高产成本有效的生产方法中,核糖核酸的毒性被认为是关注的问题。 描述了高产细胞内积累或分泌核毒素的方法。 优选使用蛋白酶缺陷菌株和通过蛋白酶使核酸毒素最小化的其它方法。 描述了用于该方法的载体和宿主菌株。