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mhbR和mhbT基因移码突变对3-羟基苯甲酸代谢的影响 被引量:1

THE IMPACT OF FRAMESHIFT MUTAIONS WITHIN mhbR AND mhbT ON THE CATABOLISM OF 3-HYDROXYBENZOATE
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摘要 KlebsiellapneumoniaeM5a1菌株能以 3 羟基苯甲酸作为唯一碳源和能源生长 ,编码分解代谢 3 羟基苯甲酸的基因被克隆至一 8kb的DNA片段上 (pBSI质粒 ) ,含有该质粒的大肠杆菌获得了以 3 羟基苯甲酸作为唯一碳源和能源生长的能力。经测序并与GenBank中的已知基因产物进行氨基酸同源性比较后 ,发现其中的mhbR与转录调节基因和mhbT与底物转运基因具有较高同源性 ,推断可能具有相应的功能。含有mhbR的移码突变子或mhbT的移码突变子的大肠杆菌在底物 3 羟基苯甲酸中培养时 。 Klebsiella pneumoniae M5a1 metabolizes 3-hydroxybenzoate via gentisate to central metabolites. The plasmid pBSI encoding the full catabolic pathway endowed E.coli with the ability to grow on 3-hydroxybenzoate. We have determined the sequence of an 8-kb region spanning the mhb genes. Blast search in the GenBank revealed the mhbR was a putative transcript regulator and mhbT was a putative 3-hydroxybenzoate transporter. The E.coli strain containing the plasmid with frameshift mutantion either in mhbR or mhbT grew more slowly on 3-hydroxybenzoate than that containing the wild type clone.
出处 《微生物学通报》 CAS CSCD 北大核心 2004年第2期41-44,共4页 Microbiology China
基金 国家自然科学基金资助项目 (No 30 170 0 36 )~~
关键词 3-羟基苯甲酸代谢 龙胆酸途径 移码突变 Hydroxybenzoate catabolism, Gentisate pathway, Frameshift mutation
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参考文献8

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同被引文献10

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