一种具有碳氧胺酶活性的真核转录抑制剂
1Department of Biochemistry, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.
Nature
|November 2, 1995
概括
研究人员确定了AEBP1,这是一个新型的转录因子,对脂肪细胞分化至关重要. AEBP1抑制脂肪基因表达,并可能通过酶分裂调节转录.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 脂肪细胞分化涉及调节甘油三代谢基因,如编码ALBP的脂肪P2 (aP2) 基因.
- aP2促进体的AE-1序列是一个受影响aP2基因表达的因素所约束的调节元件.
研究的目的:
- 克隆和描述涉及aP2基因抑制的3T3前脂质细胞因子 (AEBP1).
- 调查AEBP1及其相关的碳酸酶活性在脂肪细胞分化中的作用.
主要方法:
- 补充DNA (cDNA) 克隆用于识别AEBP1.1.
- 在脂肪细胞分化过程中对AEBP1表达的分析.
- 评估AEBP1在转录抑制中的碳氧酶活性.
主要成果:
- 克隆的cDNA编码了3T3前脂肪细胞因子AEBP1.1.
- 在脂肪细胞分化过程中,AEBP1的表达下调.
- 与AEBP1相关的碳氧酶活性对于其转录抑制功能至关重要.
结论:
- AEBP1作为aP2基因表达的抑制剂.
- AEBP1可能代表一种新型的转录因子类别,通过酶分裂调节转录.
相关概念视频
RNA Polymerase II Accessory Proteins
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...
Prokaryotic Transcriptional Activators and Repressors
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...
Co-activators and Co-repressors
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
Eukaryotic Transcription Inhibitors
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
RNA Polymerase II Accessory Proteins
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...
Co-activators and Co-repressors
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...


