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Identification and cloning of the gene responsible for the degradation of malachite green in Staphylococcus aureus ATCC 29213.

机译:鉴定和克隆负责金黄色葡萄球菌ATCC 29213中孔雀石绿降解的基因。

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摘要

The triphenylmethane dye malachite green is widely used in industrial and agricultural settings in many countries due to its effectiveness and low cost. However, the United States has labeled it a possible carcinogen and banned its use. Previous studies have showed that intestinal bacteria have the ability to degrade malachite green to leucomalachite green, a colorless and less toxic form. Furthermore, the enzyme triphenylmethane reductase (TMR) from Citrobacter sp. Strain KCTC18061P has been purified and demonstrated to catalyze the decolorization. In this study, Staphylococcus aureus ATCC 29213 was shown to degrade malachite green rapidly without the detection of leucomalachite green. Genetic analysis indicated the open reading frame mw0381 in S. aureus subsp. aureus MW2 had a similar dinucleotide binding motif as TMR. Cloning of mv0381 from S. aureus ATCC 29213 and its overexpression in Escherichia coli BL21(DE3) confirmed it increased the capacity of the host cell to decolorize malachite green. Since leucomalachite green was not detected, it is possible an undefined mechanism might exist in S. aureus ATCC 29213 which is responsible for the degradation of malachite green.
机译:三苯基甲烷染料孔雀石绿由于其有效性和低成本而在许多国家的工业和农业环境中得到了广泛使用。但是,美国已将其标记为可能的致癌物,并禁止使用它。先前的研究表明,肠道细菌具有将孔雀石绿降解为无色,毒性较小的形式的孔雀绿的能力。此外,来自柠檬酸杆菌的酶三苯甲烷还原酶(TMR)。菌株KCTC18061P已纯化,并证明可催化脱色。在这项研究中,金黄色葡萄球菌ATCC 29213被证明可以快速降解孔雀石绿,而无需检测到白孔雀绿。遗传分析表明在金黄色葡萄球菌亚种中有开放阅读框mw0381。金黄色葡萄球菌MW2具有与TMR相似的二核苷酸结合基序。从金黄色葡萄球菌ATCC 29213克隆mv0381及其在大肠杆菌BL21(DE3)中的过表达证实,它增加了宿主细胞使孔雀石绿脱色的能力。由于未检测到白孔雀绿,因此在金黄色葡萄球菌ATCC 29213中可能存在不确定的机制,其负责孔雀石绿的降解。

著录项

  • 作者

    Cao, Ying.;

  • 作者单位

    Emporia State University.;

  • 授予单位 Emporia State University.;
  • 学科 Biology Molecular.;Biology Microbiology.
  • 学位 M.S.
  • 年度 2009
  • 页码 46 p.
  • 总页数 46
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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