替代性RNA聚合酶的西格玛因子作为致病性螺旋体中的主调节剂 Leptospira interrogans
Sabina Kędzierska-Mieszkowska1, Zbigniew Arent2
1Department of General and Medical Biochemistry, Faculty of Biology, University of Gdansk, 80-308 Gdansk, Poland.
Pathogens (Basel, Switzerland)
|November 27, 2025
概括
在Leptospira interrogans中,替代性西格玛因子对于适应和宿主相互作用至关重要. 本综述强调了它们的作用,特别是研究不足的超细胞质功能 (ECF) 西格玛因子,在致病性方面.
科学领域:
- 微生物学 微生物学
- 细菌病原体的产生
- 基因组学就是基因组学.
背景情况:
- 勒普托斯皮拉问答会导致勒普托斯皮罗斯,这是一个广泛的动物性疾病,对健康和经济产生重大影响.
- 替代性西格玛因子对于细菌适应环境变化和宿主-病原体相互作用至关重要.
- L. interrogans具有复杂的转录调节系统,涉及多个西格玛因子.
研究的目的:
- 审查目前关于Leptospira中的替代西格玛因子的知识.
- 为了强调细胞外功能 (ECF) 的作用,西格玛因子.
- 探索它们在基因调节,适应和致病性方面的潜在参与.
主要方法:
- 审查现有的文献和基因组分析.
- 比较基因组学以确定西格玛因子家族.
- 讨论已知和预测的西格玛因子函数.
主要成果:
- L. interrogans的基因组编码了14个西格玛因子:一个家政类型和三个替代类型 (σ54, σ28, ECF).
- 预测的11个细胞外质功能 (ECF) 西格玛因子代表了一个重要的,研究不足的调节组.
- 这些因素可能有助于L. interrogans的适应性和毒性.
结论:
- 替代性西格玛因子,特别是ECF类型,是L. interrogans.中的关键调节者.
- 对ECF西格玛因子的进一步研究对于理解莱普托斯皮罗斯病原体至关重要.
- 针对这些监管机构可以为疾病控制提供新的战略.
相关概念视频
Bacterial RNA Polymerase
32.4K
Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
32.4K
Bacterial RNA Polymerase
11.5K
11.5K
Global Regulatory Systems
572
Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
572
Translational Regulation
512
Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
512
Bacterial Phylum Spirochaetes
548
Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased...
548
Gene Regulation During Sporulation
420
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
420


