Rad54は,同質再結合中のATP水解に依存したDNA配列アラインメントを駆動する.
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
PubMedで要約を見る
まとめ
この要約は機械生成です。Rad54タンパク質は,テンプレート・ストランドを破壊することによって,同類再結合 (HR) 時にDNAを積極的に調整する. この分子運動機構は,複製タンパク質A (RPA) の助けを借りて,ゲノムの完全性のためにDNA配列の調整を精製します.
科学分野
- 分子生物学
- 遺伝学
- 生物化学
背景
- ホモログ的再結合 (HR) は,ゲノムの完全性を維持するために不可欠です.
- HRの欠陥は病気,特に癌と関連しています.
- HRのホモロジー検索の正確なメカニズムは,まだ完全に理解されていません.
研究 の 目的
- ホモロゲス再結合中のホモロジー検索における Rad54 タンパク質の役割を解明する.
- Rad54がDNA配列をテンプレートで調整する方法を調査する.
- Rad54,複製タンパク質A (RPA) とHR中のDNA鎖の相互作用を理解する.
主な方法
- 単一分子イメージング技術が採用されました.
- Rad54のDNAアラインメントにおける機能が研究されました.
- Rad54,RPA,DNAの相互作用を分析した.
主要な成果
- Rad54は,パッシブな拡散からATP依存の運動メカニズムにホモロジー検索を移行します.
- Rad54はドナー・テンプレート DNAの鎖を破壊し 移動するバブルのような構造を作り出します
- 複製タンパク質A (RPA) はこの構造に結合し,検索プロセスを容易にします.
結論
- Rad54はHR中のDNA配列の調整を推進する分子モーターとして機能します.
- Rad54-RPA複合体は HRにおけるDNAアラインメントメカニズムを根本的に変化させる.
- この過程を理解することで ゲノムの安定性や癌の発生に関する 洞察が得られます
自動的に一致したビデオです Contact us もしそれらが関連していない場合
自動的に一致したビデオです Contact us もしそれらが関連していない場合
関連する概念動画
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
DNA replication is initiated at sites containing predefined DNA sequences known as origins of replication. DNA is unwound at these sites by the minichromosome maintenance (MCM) helicase and other factors such as Cdc45 and the associated GINS complex.The unwound single strands are protected by replication protein A (RPA) until DNA polymerase starts synthesizing DNA at the 5’ end of the strand in the same direction as the replication fork. To prevent the replication fork from falling apart,...
DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
Overview
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount...