SIP2是Plasmodium merozoite形成的主要转录因子
Tsubasa Nishi1, Izumi Kaneko1, Masao Yuda1
1Department of Medicine, Mie University, Tsu 514-8507, Japan.
Science advances
|March 21, 2025
概括
SIP2是一种主要的转录因子,对疟疾寄生虫 merozoite 形成至关重要. 它的破坏阻止了寄生虫的发展,揭示了它在建立红细胞感染性方面的关键作用.
科学领域:
- 分子寄生虫学 分子寄生虫学
- 传染病 传染病 传染病
- 基因组学就是基因组学.
背景情况:
- 疟疾是由 *Plasmodium* 寄生虫引起的,涉及红细胞内发育.
- 梅罗佐伊特的形成对于疟疾的发病过程至关重要,但人们对其了解甚少.
- 作为AP2的转录因子,SIP2在感染红细胞的复合细胞中保存着.
研究的目的:
- 为了阐明Plasmodium*中 merozoite形成的分子机制.
- 为了研究SIP2转录因子在Plasmodium berghei中的功能.
主要方法:
- 在Plasmodium berghei*中 *pbsip2* 的条件基因破坏.
- 基因表达分析 (含有RNA-seq).
- 染色体免疫沉测序 (ChIP-seq) 用于识别PbSIP2的结合部位.
主要成果:
- *pbsip2*的条件干扰导致了 merozoite 形成之前的发育停止.
- PbSIP2是一种主转录因子,可以激活与 merozoite 相关的基因.
- PbSIP2与cis调节元件结合,包括TGCAN4-6GTGCA动机,以调节基因表达.
结论:
- SIP2对于 merozoite 的形成是必不可少的,并建立了红细胞的感染性.
- SIP2很可能是从感染红细胞的形复合体寄生虫的共同祖先进化而来的.
- 了解SIP2的作用为疟疾控制提供了潜在的目标.
相关概念视频
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
General Transcription Factors
5.1K
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...
5.1K
RNA Polymerase II Accessory Proteins
9.1K
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...
9.1K
Transcription Factors
75.5K
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...
75.5K
Transcription Initiation
16.1K
Initiation is the first step of transcription in eukaryotes. Prokaryotic RNA Polymerase (RNAP) can bind to the template DNA and start transcribing. On the other hand, transcription in eukaryotes requires additional proteins, called transcription factors, to first bind to the promoter region in the DNA template. This binding helps recruit the specific RNAP that can assemble on the DNA and start transcription.
The promoters and enhancers and their accessory proteins allow tight regulation of...
The promoters and enhancers and their accessory proteins allow tight regulation of...
16.1K
Prokaryotic Transcriptional Activators and Repressors
20.5K
The organization of prokaryotic genes in their genome is notably different from that of eukaryotes. Prokaryotic genes are organized, such that the genes for proteins involved in the same biochemical process or function are located together in groups. This group of genes, along with their regulatory elements, are collectively known as an operon. The functional genes in an operon are transcribed together to give a single strand of mRNA known as polycistronic mRNA.
Transcription of prokaryotic...
Transcription of prokaryotic...
20.5K


