Pax5 C-终端域在控制B细胞承诺和发育方面的重要作用
Sarah Gruenbacher1,2, Markus Jaritz1, Louisa Hill1
1Research Institute of Molecular Pathology, Vienna BioCenter , Vienna, Austria.
The Journal of experimental medicine
|September 19, 2023
概括
在B细胞调节器Pax5
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 帕克斯5是B细胞发育的关键调节者.
- 了解Pax5域的特定功能对于B细胞生物学至关重要.
- 以前的研究还没有完全阐明个别Pax5域在基因调节中的作用.
研究的目的:
- 为了研究在B细胞发育过程中不同Pax5域的体内功能.
- 确定特定的Pax5域如何调节基因表达和染色质可访问性.
- 识别与Pax5域相互作用的蛋白质复合体,以调节基因调节.
主要方法:
- 产生有针对性地删除Pax5域的小鼠 (八,家庭主体,CRD1,CRD2).
- 在淘汰赛小鼠中分析B细胞发育和淋巴发育.
- 染色体可访问性测定和共同免疫沉实验,以研究基因调节和蛋白质相互作用.
主要成果:
- 删除八个或部分主体主体对B淋巴发育的影响很小,但这两者都是最佳发育所需的.
- 删除CRD1干扰了B细胞的发育,而删除CRD2的影响很小;联合删除在亲B细胞阶段停止了发育.
- 帕克斯5域,特别是CRD1,通过调节染色质可访问性和与染色质修饰复合体 (BAF,Set1A-COMPASS,NSL,Sin3-HDAC,MiDAC) 相互作用来调节目标基因.
结论:
- 特定的Pax5域在调节B细胞承诺和发育所必需的基因表达方面发挥着关键的,独特的作用.
- Pax5利用不同的分子机制,包括招募各种染色体修饰复合体,以激活或抑制基因.
- 这项研究提供了详细的分子洞察力,了解B淋巴发育过程中Pax5-介导的转录调节.
更多相关视频
相关概念视频
Lineage Commitment
3.0K
Commitment is the process whereby stem cells:
3.0K
B Cell Activation and Differentiation
1.8K
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
1.8K
Master Transcription Regulators
6.9K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
6.9K
General Transcription Factors
5.4K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
5.4K
Combinatorial Gene Control
8.4K
Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
8.4K
Notch Signaling Pathway
4.3K
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
4.3K


