促进体中的高阶G四复合体是尚未开发的药物标
1Department of Medical Oncology and Hematology, UofL Health Brown Cancer Center, University of Louisville, Louisville, KY, United States.
Frontiers in chemistry
|June 23, 2023
概括
高级G四复合体 (G4s) 提供比单体形式更有选择性的癌症药物标. 专注于这些复杂结构可以克服难以向蛋白质G4连接体开发的局限性.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 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:
- G四重复体 (G4s) 是在富含关氨酸的基因组区域中发现的四链DNA结构.
- 大约40%的G4基因位于基因促销器区域,影响转录.
- G4s作为表观遗传标记物和转录因子的结合部位,影响基因表达.
研究的目的:
- 为了对比单质和更高阶的G-四重复结构和功能.
- 为在药物发现中针对高阶G4s而不是单体形式提供理由.
- 突出高阶G4s作为难以向蛋白质的选择性药物标的潜力,特别是在癌症中.
主要方法:
- 对单体和更高阶G-四重复结构的审查和比较.
- 分析G4s作为表观遗传特征和转录因子结合中心的分析.
- 使用人类端粒酶逆转录酶 (hTERT) 核心促进物G-quadruplex的案例研究.
主要成果:
- 单质G4结构缺乏特异性,阻碍了G4配体的临床进展.
- 高阶G4s为开发选择性分子标提供了更有前途的途径.
- 该hTERT促进器G-四重复例证了高阶G4s在向癌症治疗中的潜力.
结论:
- 将重点转移到高阶G-四复合体对于推进基于G4的药物发现至关重要.
- 高阶G4s可以作为选择性的间接抑制剂来挑战治疗点.
- 针对高阶G4s,如hTERT促进体G4,显示出有效治疗癌症的潜力.
相关概念视频
Cooperative Binding of Transcription Regulators
6.5K
Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...
6.5K
The Eukaryotic Promoter Region
16.4K
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
16.4K
G Protein-coupled Receptors
12.3K
G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
12.3K
Eukaryotic Transcription Inhibitors
9.9K
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...
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
9.9K
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
RNA Polymerase II Accessory Proteins
9.3K
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...
9.3K


