经过处理的mRNA在调节大肠杆菌pilin基因表达方面具有差异稳定性
M Båga1, M Göransson, S Normark
1Department of Microbiology, University of Umeå, Sweden.
Cell
|January 29, 1988
概括
大肠杆菌的粘附依赖于特定的mRNA处理. 这项研究揭示了转录后控制如何调节papA基因,确保产生主要的细菌粘附的pilus子单元.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 大肠杆菌利用 pili 粘附于宿主细胞.
- papA-I基因集群编码 pili,而papA 是主要的亚单元基因.
- 操作子内的基因表达通常受到严格监管.
研究的目的:
- 研究大肠杆菌中papA基因的转录后调节.
- 了解mRNA处理如何影响pilus子单元的产生.
- 为了阐明控制不同基因表达的机制在巴巴操作.
主要方法:
- 来自papA-I操作子的多基斯特龙mRNA转录的分析.
- 内核分裂裂解试验用于识别mRNA处理部位.
- 确定不同转录片段的半衰期的mRNA稳定性研究.
- 识别涉及转录稳定性和衰减的序列.
主要成果:
- papA基因是包含papB基因的多基斯特隆转录的一部分.
- 内核分解裂变分离了papB和papA的转录.
- 编码papB的mRNA片段经历快速衰变,而编码papA的片段是稳定的.
- 下游序列增强了papA转录的稳定性,并减弱了读透转录到papH.
结论:
- 转录后处理和差异性mRNA稳定性调节了papA基因的表达.
- 这种机制确保了mRNA的积累主要的pilus子单元.
- 操作子基因表达可以通过mRNA处理控制,包括内核和外核分裂裂变.
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