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関連する概念動画

Genome Copying Errors02:46

Genome Copying Errors

4.4K
DNA replication is a well-evolved process that copies millions of base pairs with high fidelity during each cell division. Occasionally a wrong base or a long stretch of wrong bases may get added to the daughter strands. If the errors are left unchecked, cells might accumulate several mutations that might endanger their  survival. Therefore, the copying errors are checked and repaired at three levels.
4.4K
Overview of DNA Repair02:25

Overview of DNA Repair

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In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
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Mismatch Repair01:36

Mismatch Repair

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Overview
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Base Excision Repair01:54

Base Excision Repair

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One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
The first step of...
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Fixing Double-strand Breaks02:04

Fixing Double-strand Breaks

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The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...
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Nucleotide Excision Repair01:38

Nucleotide Excision Repair

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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...
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Updated: Sep 3, 2025

Using Next Generation Sequencing to Identify Mutations Associated with Repair of a CAS9-induced Double Strand Break Near the CD4 Promoter
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DNAのエンジニアリング上の欠陥

YuHuang Wang1

  • 1Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA.

Science (New York, N.Y.)
|July 28, 2022
PubMed
まとめ
この要約は機械生成です。

単一壁の炭素ナノチューブを構造的に改造するために遺伝子配列が使用されました. この研究は,生物工学のアプローチを通じてナノマテリアルの性質を変更するための新しい方法を探求しています.

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Using Next Generation Sequencing to Identify Mutations Associated with Repair of a CAS9-induced Double Strand Break Near the CD4 Promoter
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科学分野:

  • 材料科学
  • バイオテクノロジー
  • ナノテクノロジー

背景:

  • シングルウォールカーボンナノチューブ (SWCNT) は,ユニークな電子的,機械的特性を持っています.
  • 高度なアプリケーションでは,SWCNTの構造と機能の制御が不可欠です.
  • 現在の改造方法は しばしば 苛酷な化学物質や複雑なプロセスを含んでいます

研究 の 目的:

  • SWCNTの構造改変のために遺伝子配列を使用する可能性を調査する.
  • SWCNTの特性を調整するための新しいバイオインスピレーションのアプローチを探求する.
  • 遺伝子組み換えナノマテリアルの 基礎を築くために

主な方法:

  • SWCNT表面と相互作用するように設計された特定の遺伝子配列を使用します.
  • SWCNTにおける配列による構造的変化を促進するテクニックを使用する.
  • 改良されたSWCNTの特徴は,高度なスペクトルおよび顕微鏡の方法を使用しています.

主要な成果:

  • 遺伝子配列によるSWCNTの構造的改変が成功していることが実証された.
  • 修飾後のSWCNTの形態と電子特性の変化を観察した.
  • ナノチューブ構造に影響を与える特定の配列-DNA相互作用を特定した.

結論:

  • 遺伝子配列はSWCNTを改変するための正確で潜在的にバイオコンパティブルな方法を提供します.
  • このアプローチは 機能化されたナノ素材を 独自の特性で作るための 新たな道を開きます
  • より広範なSWCNTエンジニアリングアプリケーションのために,さらなる研究により,多様な遺伝的要素を探索することができます.