对烷基化剂n -甲基-n′-硝基-n -亚硝基胍抗性增强的中性曲霉突变体

P. Hooley, S.G. Shawcross, P. Strike
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引用次数: 4

摘要

本文描述了具有MNNG抗性的空心曲霉突变体的分离和特性。这些分离物在没有选择剂的情况下通过长时间的传代培养是稳定的,并且在减数分裂和有丝分裂分析中,抗性作为单个基因的等位基因分离出来。耐mnng菌株对EMS和UV辐照的抗性增强,但对MMS无交叉抗性。讨论了其抗烷基化剂的可能机理。
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Mutants of Aspergillus nidulans with increased resistance to the alkylating agent, N-methyl-N′-nitro-N-nitrosoguanidine

The isolation and characterisation of mutants of Aspergillus nidulans showing resistance to MNNG is described. Such isolates were stable through prolonged subculture in the absence of the selective agent, and resistance segregated as an allele of a single gene in meiotic and mitotic analysis. MNNG-resistant strains showed an increase in resistance to EMS and UV irradiation but no cross-resistance to MMS was detected. Possible mechanisms of resistance to alkylating agents are discussed.

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