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関連する概念動画

Restarting Stalled Replication Forks02:37

Restarting Stalled Replication Forks

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, a...
Gene Conversion02:08

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
Eukaryotic RNA Polymerases00:58

Eukaryotic RNA Polymerases

RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
All three eukaryotic RNAPs require specific transcription factors, of which the...
PCR - Polymerase Chain Reaction01:32

PCR - Polymerase Chain Reaction

Overview
Base-pairing and DNA Repair02:27

Base-pairing and DNA Repair

Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
Gene Conversion02:08

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...

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関連する実験動画

Updated: Jul 14, 2026

PAR-CliP - A Method to Identify Transcriptome-wide the Binding Sites of RNA Binding Proteins
12:24

PAR-CliP - A Method to Identify Transcriptome-wide the Binding Sites of RNA Binding Proteins

Published on: July 2, 2010

PARPはトランスクリプションを進める.

W Lee Kraus1, John T Lis

  • 1Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA.

Cell
|June 18, 2003
PubMed
まとめ

ポリー ((ADP-リボース) ポリメラーゼ1 (PARP-1) は,遺伝子調節に不可欠である. ヒストンを改変してクロマチンを解凍し,調節複合体で機能し,両者は生体内での転写に不可欠です.

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:

  • ポリー (((ADP-リボース) ポリメラーゼ1 (PARP-1) は,DNA修復と遺伝子発現に関与する酵素である.
  • PARP-1は,ADP-リボース単位が標的タンパク質に転送されるのを触媒化する.

研究 の 目的:

  • 転写調節におけるPARP-1の特定の役割を明らかにする.
  • PARP-1の酵素活性がクロマチンの構造と遺伝子発現にどのように影響するかを理解する.

主な方法:

  • この研究では,PARP-1の活性を評価するための生化学的測定法が含まれていた可能性が高い.
  • クロマチン免疫降水 (ChIP) と遺伝子発現分析が用いられた可能性が高い.
  • 研究結果を検証するために,in vivo研究が行われました.

主要な成果:

  • PARP-1はヒストンを改変し,クロマチンを解凍するポリ (ADP-リボース) マトリックスを作成します.
  • この解密は,転写のためのDNAへのアクセスを容易にする.
  • また,PARP-1は,エンハンサー/プロモーターの規制複合体の構成要素として機能します.
  • クロマチンの改変と規制複合体の役割は,両者とも,イン・ビボ (in vivo) の遺伝子調節に不可欠である.

さらに関連する動画

Quantitative Detection of DNA-Protein Crosslinks and Their Post-Translational Modifications
10:12

Quantitative Detection of DNA-Protein Crosslinks and Their Post-Translational Modifications

Published on: April 21, 2023

Visualization and Quantitative Analysis of Genotoxin-Induced PARP1/PARP2 Activation in Cells Using a Fluorescent Fusion Protein-Based Reporter
07:53

Visualization and Quantitative Analysis of Genotoxin-Induced PARP1/PARP2 Activation in Cells Using a Fluorescent Fusion Protein-Based Reporter

Published on: April 17, 2026

関連する実験動画

Last Updated: Jul 14, 2026

PAR-CliP - A Method to Identify Transcriptome-wide the Binding Sites of RNA Binding Proteins
12:24

PAR-CliP - A Method to Identify Transcriptome-wide the Binding Sites of RNA Binding Proteins

Published on: July 2, 2010

Quantitative Detection of DNA-Protein Crosslinks and Their Post-Translational Modifications
10:12

Quantitative Detection of DNA-Protein Crosslinks and Their Post-Translational Modifications

Published on: April 21, 2023

Visualization and Quantitative Analysis of Genotoxin-Induced PARP1/PARP2 Activation in Cells Using a Fluorescent Fusion Protein-Based Reporter
07:53

Visualization and Quantitative Analysis of Genotoxin-Induced PARP1/PARP2 Activation in Cells Using a Fluorescent Fusion Protein-Based Reporter

Published on: April 17, 2026

結論:

  • PARP-1は,クロマチンの構造を調節し,規制複合体への参加という二重な役割を果たしています.
  • これらの機能は,生物の適切な遺伝子発現に不可欠です.