在有氧条件下对空气耐受性和气敏Campylobacter jejuni菌株的转录组分析
Elise Delaporte1, Anand B Karki1,2, Mohamed K Fakhr1
1Department of Biological Science, The University of Tulsa, Tulsa, OK, United States.
Frontiers in microbiology
|August 14, 2025
概括
这项研究揭示了耐空气的Campylobacter jejuni菌株在暴露于氧气时,与空气敏感菌株相比,差异地表达了更多的基因. 确定了参与未知的功能,翻译和氧化应激的关键基因.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 细菌生理学 细菌生理学
背景情况:
- 空气耐受性对于Campylobacter jejuni在食品供应中的生存至关重要.
- 耐风性C. jejuni的遗传基础在很大程度上是未知的.
- 了解这些机制对于食品安全和公共健康至关重要.
研究的目的:
- 为了在有氧和微有氧条件下比较气候耐受性和气敏性C. jejuni菌株之间的差异基因表达.
- 为了确定参与C. jejuni对氧气暴露的反应的特定基因和途径.
- 为了阐明C. jejuni.的耐空性遗传基础.
主要方法:
- 利用RNA测序 (RNA-Seq) 技术来分析基因表达.
- 两种C. jejuni菌株进行了比较:一种耐空菌株 (WP2202) 和一种对空气敏感菌株 (T1-21).
- 在多个时间点在有氧和微有氧条件下评估基因表达.
主要成果:
- 与气敏菌株相比,耐气菌株表现出更大的基因表达差异,特别是在有氧暴露的前6小时内.
- COG类别S (功能不明的基因) 和COG类别J (翻译,核糖体结构和生物发生) 显示出差异表达基因数量最多.
- 观察到热冲击基因的升高调节和氧化应激基因的差异调节是对氧气的反应. 空气敏感菌株显示铁获取基因的表达增加.
- 在12小时的氧气暴露后,在两种菌株中都观察到显著的基因表达峰值.
结论:
- 当暴露于大气氧气时,耐气和气敏C. jejuni菌株之间的基因表达模式存在显著差异.
- 确定了许多可能与C. jejuni耐气性有关的候选基因,开辟了新的研究途径.
- 需要进一步研究铁在氧化应激中的作用,以及热冲击基因与C. jejuni.中氧化应激反应之间的联系.
更多相关视频
05:34Author Spotlight: Development of an Enhanced Protocol for Rapid and Accurate Isolation of Campylobacter from Food Products
Published on: February 23, 2024
2.0K
08:23Culture Methods to Determine the Limit of Detection and Survival in Transport Media of Campylobacter Jejuni in Human Fecal Specimens
Published on: March 10, 2020
11.7K
相关概念视频
Stringent Response in E. coli
53
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
53
Transcription Attenuation in Prokaryotes
16.0K
Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure. Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
16.0K
