DNA損傷の間のエネルギークロストラック:DNA修復とトリプルレピート拡張経路のアロステル結合への影響
Jens Völker1, G Eric Plum, Horst H Klump
1Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, USA.
Journal of the American Chemical Society
|March 12, 2010
まとめ
トリプル・リピート・ドメインとデュプレックス・ドメインのDNA病変はコミュニケーションをとり,DNAの膨張に影響を与えます. このクロストークはDNA修復と疾患発達の影響を及ぼし,遺伝的疾患の洞察を提供している.
科学分野:
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
- 遺伝学 遺伝学とは
背景:
- 遠く離れたDNA領域間のエネルギー結合は,生物学的プロセスを調節することができます.
- トリプルレピートに近い酸化性DNA損傷は,疾患に関連したDNA拡張を促進することができます.
- DNA損傷の相互作用を理解することは,病気のメカニズムにとって極めて重要です.
研究 の 目的:
- 異なる領域のDNA病変の間のエネルギークロスストークを調査する.
- 病変の位置と距離が,この相互作用にどのように影響するか判断する.
- DNA修復と病気への影響を調査する.
主な方法:
- トリプルリピートブームループと隣接するデュプレックスドメイン内のDNA病変のペアを研究した.
- 位置と距離に基づいて,傷害依存のエネルギー転送を分析した.
- DNA膨張イベントと疾患状態と相関する発見.
主要な成果:
- ディスタルDNAドメイン間の位置,距離,および病変依存のエネルギークロストークが実証された.
- ループとデュプレックス領域の病変の間の結合通信が観察されました.
- このクロストークをDNA修復効率と膨張イベントと関連付けました.
結論:
- ディスタルDNA病変の間のエネルギークロストラックは,生物学的調節における重要な要因である.
- この通信経路は,DNAの修復と膨張に影響を与え,病気に寄与します.
- 発見は,DNAの不安定性に関連した病気を理解し,潜在的に標的を絞るための基礎を提供します.
関連する概念動画
Translesion DNA Polymerases
Translesion (TLS) polymerases rescue stalled DNA polymerases at sites of damaged bases by replacing the replicative polymerase and installing a nucleotide across the damaged site. Doing so, TLS allows additional time for the cell to repair the damage before resuming regular DNA replication.
TLS polymerases are found in all three domains of life - archaea, bacteria, and eukaryotes. Of the different classes of TLS polymerases, members of the Y family are fitted with specialized structures that...
TLS polymerases are found in all three domains of life - archaea, bacteria, and eukaryotes. Of the different classes of TLS polymerases, members of the Y family are fitted with specialized structures that...
Nucleotide Excision Repair
Overview
Nucleotide Excision Repair
DNA Distortion and Damage
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Nucleotide Excision Repair
Overview
Homologous Recombination
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...
Long-patch Base Excision Repair
Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:


