应用iTRAQ定量蛋白质组学研究海分枝杆菌mkl的基因功能
发布时间:2019-01-10 07:01
【摘要】:【目的】通过分离海分枝杆菌野生株和mkl突变株的全菌蛋白,并进行差异蛋白质组分析,以期为探索分枝杆菌重要毒力基因mkl的功能提供新思路。【方法】以海分枝杆菌野生株和mkl突变株为研究材料,提取全菌蛋白,i TRAQ试剂标记后进行质谱鉴定和定量分析,并利用Uni Prot数据库对差异蛋白进行生物信息学分析。【结果】共鉴定出在野生株和mkl突变株中差异表达蛋白566个,其中在突变株中上调表达蛋白232个(比值≥1.4),下调表达蛋白334个(比值≤0.7)。生物信息学预测这些蛋白主要参与细菌脂质代谢、细胞壁和细胞进程、中间代谢、呼吸作用等生物学功能。其中Des A3下调最显著,其功能为脂肪酸去饱和酶,与油酸合成相关,进一步验证发现mkl突变株在不含油酸的固体培养基中生长受限,提示mkl可能在油酸的生物合成通路中发挥功能。【结论】通过i TRAQ分析了海分枝杆菌mkl突变株和野生株的差异表达蛋白谱,发现可能影响分枝杆菌油酸、脂质等合成代谢通路,为进一步研究mkl基因在分枝杆菌致病中发挥作用的相关机制奠定了基础。
[Abstract]:[objective] to isolate the whole bacterial proteins from wild and mkl mutants of Mycobacterium sea, and to analyze the differential proteome. In order to provide a new idea for exploring the function of the important virulence gene mkl of Mycobacterium sp. [methods] the wild and mkl mutants of Mycobacterium martensii were extracted and labeled with, i TRAQ reagent for mass spectrometry and quantitative analysis. A total of 566 differentially expressed proteins were identified in wild and mkl mutants, among which 232 proteins were upregulated in mutants (ratio 鈮,
本文编号:2406026
[Abstract]:[objective] to isolate the whole bacterial proteins from wild and mkl mutants of Mycobacterium sea, and to analyze the differential proteome. In order to provide a new idea for exploring the function of the important virulence gene mkl of Mycobacterium sp. [methods] the wild and mkl mutants of Mycobacterium martensii were extracted and labeled with, i TRAQ reagent for mass spectrometry and quantitative analysis. A total of 566 differentially expressed proteins were identified in wild and mkl mutants, among which 232 proteins were upregulated in mutants (ratio 鈮,
本文编号:2406026
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