DNAメチルトランスフェラーゼ阻害のための配列特異のDNA結合分子の設計
JeenJoo S Kang1, Jordan L Meier, Peter B Dervan
1Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States.
Journal of the American Chemical Society
|February 8, 2014
まとめ
研究者らは,DNAメチル化制御のためのCpGサイトを標的とする新しい小分子を開発した. 1つの分子,ヘアピン3は,DNAメチルトランスフェラーゼの活性を効果的に抑制し,新しい表遺伝子療法のための基礎を提供します.
科学分野:
- 化学生物学 化学生物学とは
- エピジェネティクス エピジェネティクス
- 分子生物学は分子生物学である.
背景:
- CpGダイアードは,DNAメチル化と遺伝子調節に関与する重要なゲノム要素です.
- CpGダイアードを標的とする小分子は,転写活動の調節に価値があります.
- マイナー・グリューブ・バインディング・オリゴマーは,シーケンス固有のCpG認識のための潜在的な戦略を提供します.
研究 の 目的:
- ヘアピンピロール-イミダゾールポリアミドのCpG配列の認識における有効性を評価する.
- これらのポリアミドの結合指向と特異性を調査する.
- CpGメチル化に対抗する小分子設計のための基礎を確立する.
主な方法:
- ヘアピンピロール-イミダゾールポリアミドのライブラリを5'-CGCG-3'配列に対してスクリーニング.
- 次世代のシーケンシングを使用して,シーケンス特異性の公正な評価を行う.
- 特定されたポリアミドによるDNAメチルトランスフェラーゼ活性抑制の評価.
主要な成果:
- ヘアピンポリアミドPyImβIm-γ-PyImβIm (1) は予想外にも5'-GCGC-3'-結合を逆方向に促進した.
- PyImPyIm-γ-PyImβIm (3) の変更により,5'-CGCG-3'の優先順位が前向きに回復しました.
- ヘアピン3は,ポリアミド1と比較して,DNAメチルトランスファーゼの活性に対するより優れた阻害を示した.
結論:
- ピロロールイミダゾールポリアミドは,特定のCpG配列認識と結合指向のために設計することができます.
- ヘアピンポリアミド3は,DNAメチルトランスファーゼの活性を標的部位で強力に阻害する.
- これらの発見は,CpGメチレーションのシーケンス固有のアンタゴニストを開発するための分子枠組みを提供します.
関連する概念動画
Eukaryotic Transcription Inhibitors
9.1K
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...
9.1K
Single-Strand DNA Binding Proteins
12.9K
For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
12.9K
Inhibitors of Bacterial DNA Synthesis
130
Bacterial pathogens depend on precise and efficient DNA replication to sustain infection. Two type II topoisomerases—DNA gyrase and topoisomerase IV—are critical to this process, as they resolve DNA supercoiling and unlink chromosomes during replication. Fluoroquinolones, synthetic derivatives of quinolones, exploit this mechanism by stabilizing the transient DNA–enzyme cleavage complex, preventing strand religation, and causing lethal double-strand breaks. These...
130
Cooperative Binding of Transcription Regulators
6.0K
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...
6.0K
Restriction Enzymes
31.4K
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...
31.4K


