大腸桿菌多重耐藥負(fù)性調(diào)節(jié)基因及膜孔蛋白的研究
[Abstract]:In order to study the relationship between multidrug resistance of Escherichia coli (E. coli) multidrug resistance gene (MarR), Escherichia coli pump suppressor gene (AcrR) mutation, membrane pore protein deletion and multidrug resistance of Escherichia coli. In this study, the standard strain, the sensitive strain isolated in clinic, the drug-resistant strain induced by artificial and the drug-resistant strain isolated in clinic were studied from the gene level and protein level. Through cloning and sequencing of MarR and AcrR genes and extraction of membrane porin, the relationship between multiple tolerance of Escherichia coli and MarR and AcrR mutation and membrane pore protein deletion was analyzed. The results showed that the MarR and AcrR of resistant and sensitive strains were mutated to different degrees. The mutation of MarR gene had little effect on the multidrug resistance of bacteria. The mutation of AcrR gene might lead to the production of multidrug resistance of bacteria to multiple antibiotics to a greater extent. Only one strain of drug-resistant bacteria found that the absence of membrane pore protein (OmpF,) had little effect on the multidrug resistance of Escherichia coli.
【學(xué)位授予單位】:吉林大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2006
【分類號】:S852.61;R378
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