细菌RNA聚合酶关联的CarD蛋白对促进者活动到DNA超级卷曲
David Forrest1, Emily A Warman2, David C Grainger3
1School of Biosciences, University of Birmingham, Edgbaston, Birmingham, UK. d.a.forrest@bham.ac.uk.
Nature communications
|February 3, 2026
概括
通过打开DNA,CarD蛋白质有助于细菌转录的启动,但可以抑制它. 在Rhodobacter sphaeroides中,CARD将基因表达与DNA超结联系起来,特别是在促进体缺陷的情况下.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 转录启动需要RNA聚合酶 (RNAP) 在促进体-10元素解开DNA.
- 蛋白CARD有助于打开-10元素,通常激活转录.
- Rhodobacter sphaeroides 具有独特的促进体-10 元素缺陷,使得 CarD 变得至关重要.
研究的目的:
- 为了研究心脏病和DNA拓在Rhodobacter sphaeroides中转录调节中的全球作用.
- 了解CarD和DNA超级卷如何共同调节转录,特别是在促进体缺陷的背景下.
主要方法:
- 基因组工具被用来绘制转录启动,RNAP结合,CARD相互作用和DNA拓的地图.
- 生物化学试验被用来分析通过心脏病和超级卷曲的促进体协调.
主要成果:
- 在CarD控制的转录和负DNA超级卷之间发现了显著的关联.
- 这种相互作用改变了全球基因表达,特别是由于R. sphaeroides促进体内固有的-10元素缺陷.
- 纠正促进器缺陷破坏了通过心脏病和超级卷的共同调节.
结论:
- 心血管和DNA超级卷合共同调节R. sphaeroides中的转录,由促进体-10元素缺陷驱动.
- 建议通过DNA拓学将家政转录与环境条件结合起来.
- 在压力过程中超级卷的消散意味着基因调节中的环境感知机制.
更多相关视频
相关概念视频
Bacterial RNA Polymerase
32.8K
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...
32.8K
Bacterial RNA Polymerase
11.9K
11.9K
RNA Polymerase II Accessory Proteins
11.0K
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
11.0K
RNA Polymerase II Accessory Proteins
4.0K
4.0K
Eukaryotic RNA Polymerases
27.1K
RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
All three eukaryotic RNAPs require specific transcription factors, of which the...
All three eukaryotic RNAPs require specific transcription factors, of which the...
27.1K
Eukaryotic RNA Polymerases
9.6K
9.6K


