相关实验视频
Updated: May 15, 2025

06:45
Transmembrane Domain Oligomerization Propensity determined by ToxR Assay
Published on: May 26, 2011
15.2K
Rtf1 HMD 域促进了全球 histone H2B 的单双化,并调节了脑膜炎引起的病原体 Cryptococcus neoformans 的形态发生和毒性
Yixuan Jiang1, Ying Liang1, Fujie Zhao1
1College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, China.
eLife
|May 12, 2025
概括
在Cryptococcus neoformans中,Rtf1通过促进组织蛋白修饰来调节真菌发育和毒性. 这种蛋白质独立于Paf1复合体运作,其基因素修饰域对这些过程至关重要.
科学领域:
- 分子生物学分子生物学
- 菌类学 菌类学是指菌类学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- Paf1复合体 (Paf1C) 参与了组 histone 的修饰和 RNA 的生物合成.
- Rtf1通常被认为是Paf1C的子单元,但它的关联性在物种之间有所不同.
- 在真菌病原体中Rtf1的功能在很大程度上仍然未被描述.
研究的目的:
- 为了研究Rtf1在真菌病原体Cryptococcus neoformans中的作用.
- 确定Rtf1与Paf1C的关联及其在基因素修饰中的功能.
- 阐明Rtf1对真菌形态发生和致病性的贡献.
主要方法:
- 在Cryptococcus neoformans中基因删除和补充.
- 分析基因素H2B单双化 (H2Bub1) 的水平.
- 评估真菌形态发生,交配和丝状的形成.
- 评估病原性,耐热性和黑色素的产生.
主要成果:
- Rtf1对H2Bub1至关重要,并调节C. neoformans的真菌形态发生和病原性.
- 在这种真菌中,Rtf1与Paf1C没有密切关联.
- Rtf1的基因组修饰域 (HMD) 足以恢复H2Bub1,交配,丝,形态发生和致病性.
- Rtf1 HMD无法恢复热耐受性或黑色素生产缺陷.
结论:
- 在C. neoformans中,Rtf1充当了形态发生和致病性的Paf1C独立调节者.
- Rtf1的HMD在促进全球H2Bub1.1中发挥着至关重要的作用.
- 这项研究揭示了Rtf1在真菌病变发生过程中的新功能.
相关概念视频
Types of RNA
62.8K
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
62.8K
Spreading of Chromatin Modifications
8.1K
The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer...
Writers
The writer...
8.1K
Master Transcription Regulators
6.8K
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...
6.8K
Bacterial RNA Polymerase
28.1K
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...
28.1K
Intracellular Movement of Viruses and Bacteria
2.7K
Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
2.7K
Transcription Attenuation in Prokaryotes
15.0K
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...
15.0K

