関連する実験動画
Updated: Aug 16, 2025
07:44
Design and Synthesis of a Reconfigurable DNA Accordion Rack
Published on: August 15, 2018
7.1K
ランダムシーケンスプールにおけるトーホールドメディエートされたストランドの移位
Thomas Mayer1, Lukas Oesinghaus1, Friedrich C Simmel1
1School of Natural Sciences, Department of Bioscience, TU Munich, D-85748Garching, Germany.
Journal of the American Chemical Society
|December 26, 2022
まとめ
DNA配列の背景を理解することは 頑丈な分子回路に不可欠です この研究は,いくつかの強力に相互作用するシーケンスが回路運動を支配し,複雑な環境でも予測可能な回路設計を可能にします.
科学分野:
- 分子生物学
- 合成生物学
- バイオ物理学
背景:
- トーホールド媒介性鎖移位 (TMSD) はDNA回路にとって不可欠である.
- 配列の類似は 交差を誘発し 回路の故障を引き起こす
- 複雑な環境における全ての相互作用を 分析することは不可能です
研究 の 目的:
- ランダムなDNA配列がTMSD回路運動に与える影響を調査する.
- 多様な配列背景におけるTMSD反応の予測モデルを開発する.
- TMSDの反応速度と強さを高めるための戦略を評価する.
主な方法:
- 個々の干渉糸を研究して 運動データを集めました
- TMSD反応運動を推定する機械学習モデルを開発した.
- TMSD反応に対するランダムなDNA配列プールの影響について調査した.
- TMSD反応を加速する3つのテクニックを比較した.
主要な成果:
- ランダムシーケンスのプールの運動は,強く相互作用するストランドの小さなサブセットによって制御されます.
- 背景配列との回路の均衡は反応速度 (10倍までの差) に著しく影響する.
- テストされたすべての加速度技術 (三文字のアルファベット,足先の保護,ブロックストランド) は有効でした.
- ブロックするストランドは,シーケンス制限を課さないことで利点があります.
結論:
- シーケンスバックグラウンド効果の洞察は,堅牢なTMSD回路の設計に不可欠です.
- 限られた相互作用データから予測モデルを構築できます.
- ブロックストランドは,複雑な環境でTMSD反応を強化するための多用途な方法を提供します.
関連する概念動画
02:10Translesion DNA Polymerases
10.1K
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...
10.1K
02:31Homologous Recombination
50.8K
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...
50.8K
02:37Restarting Stalled Replication Forks
5.9K
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,...
5.9K
01:59Lagging Strand Synthesis
53.7K
During replication, the complementary strands in double-stranded DNA are synthesized at different rates. Replication first begins on the leading strand. Replication starts later, occurs more slowly, and proceeds discontinuously on the lagging strand.
There are several major differences between synthesis of the leading strand and synthesis of the lagging strand. 1) Leading strand synthesis happens in the direction of replication fork opening, whereas lagging strand synthesis happens in the...
There are several major differences between synthesis of the leading strand and synthesis of the lagging strand. 1) Leading strand synthesis happens in the direction of replication fork opening, whereas lagging strand synthesis happens in the...
53.7K
01:20Mismatch Repair
5.1K
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...
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...
5.1K
03:01The Replisome
34.3K
DNA replication is carried out by a large complex of proteins that act in a coordinated matter to achieve high-fidelity DNA replication. Together this complex is known as the DNA replication machinery or the replisome.
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with...
The synthesis of the leading and lagging strands is a highly coordinated process. To explain this, the “Trombone model” was proposed by Bruce Alberts in 1980. The DNA loop formation starts when a primer is synthesized on the parent lagging strand. The loop grows with...
34.3K