相关实验视频
Updated: Jul 10, 2026

13:32
Designing a Bio-responsive Robot from DNA Origami
Published on: July 8, 2013
循环DNA和DNA/RNA杂交分子作为设计里抑制剂的支架
Matthew B Sturm1, Setu Roday, Vern L Schramm
1Department of Biochemistry, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, New York 10461, USA.
Journal of the American Chemical Society
|April 10, 2007
概括
循环DNA和RNA/DNA混合体作为有效的基质和支架,用于抑制毒素A链 (RTA). 新型循环抑制剂实现纳米分子结合,为RTA向治疗提供新的合成策略.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 药用化学 医学化学
背景情况:
- 氨酸毒素A链 (RTA) 是一种强大的核糖体失活蛋白,可以清除真核核糖体核糖体RNA.
- 最小的RNA和DNA干环结构是已知的RTA催化基质.
研究的目的:
- 探索循环DNA和DNA/RNA混合寡核酸作为RTA的新基质和抑制剂支架.
- 开发使用非传统分子架构的高强度RTA抑制剂.
主要方法:
- 循环d(GAGA) DNA和循环GdAGA DNA/RNA混合寡核酸的合成和表征.
- 用新型基质进行RTA的酶分析以确定动力参数 (kcat/Km).
- 设计和合成具有循环GAGA图案的过渡状态模拟抑制剂.
主要成果:
- 与线性形式相比,圆形d ((GAGA) 基板表现出明显增强的RTA活性 (kcat/Km增加92倍).
- 圆形基板的催化速率与传统的茎环基板的催化速率相当或超过.
- 一种新型的循环抑制剂,循环G(N-Bn) GA,以70nM的Ki实现了紧密结合抑制,是迄今为止最小的RTA抑制剂.
结论:
- 圆形寡核酸为RTA抑制剂设计提供有效的最小基质和支架.
- 基于循环图案的小,强大的抑制剂的开发绕过了对茎环结构的需求,开辟了新的合成途径.
- 这些发现为针对RTA中介毒性的新型治疗策略铺平了道路.
相关概念视频
Types of RNA
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...
RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
Cooperative Binding of Transcription Regulators
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 dimers that...
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...
Restriction Enzymes
Restriction enzymes are bacterial enzymes used to cut DNA in a sequence-specific manner. To cleave DNA, they bind to specific palindromic sequences called restriction sites. Such palindromic DNA sequences or inverted repeats are commonly found in regions of functional significance, such as the origin of replication, gene operator sites, and regions containing transcription termination signals.
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...
Types of 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 regulating 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 Performs Diverse...
RNA Performs Diverse...

