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関連する概念動画

RNA Splicing01:32

RNA Splicing

Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
RNA Splicing01:32

RNA Splicing

Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Alternative RNA Splicing02:18

Alternative RNA Splicing

Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
Pre-mRNA Processing: RNA Splicing01:32

Pre-mRNA Processing: RNA Splicing

Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...

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関連する実験動画

Updated: May 8, 2026

Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins
11:34

Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins

Published on: August 9, 2019

U2 snRNPの結合とスプライシングの複合組成には,U2AFという要素が必要である.

B Ruskin1, P D Zamore, M R Green

  • 1Department of Biochemistry and Molecular Biology, Harvard University, Cambridge, Massachusetts 02138.

Cell
|January 29, 1988
PubMed
まとめ
この要約は機械生成です。

新しく特定された因子U2AF (U2補助因子) は,U2 snRNPがプレ-mRNAに結合するのに不可欠である. この発見は,スプライシングプロセスを開始するために,3' スプライスサイトが必要であることを説明します.

さらに関連する動画

A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
08:53

A Reporter Based Cellular Assay for Monitoring Splicing Efficiency

Published on: September 15, 2021

ACT1-CUP1 Assays Determine the Substrate-Specific Sensitivities of Spliceosomal Mutants in Budding Yeast
07:31

ACT1-CUP1 Assays Determine the Substrate-Specific Sensitivities of Spliceosomal Mutants in Budding Yeast

Published on: June 30, 2022

関連する実験動画

Last Updated: May 8, 2026

Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins
11:34

Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins

Published on: August 9, 2019

A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
08:53

A Reporter Based Cellular Assay for Monitoring Splicing Efficiency

Published on: September 15, 2021

ACT1-CUP1 Assays Determine the Substrate-Specific Sensitivities of Spliceosomal Mutants in Budding Yeast
07:31

ACT1-CUP1 Assays Determine the Substrate-Specific Sensitivities of Spliceosomal Mutants in Budding Yeast

Published on: June 30, 2022

科学分野:

  • 分子生物学は分子生物学である.
  • RNA スプライシングメカニズム

背景:

  • プレ-mRNAスプライシング・コンプレックス・アセンブリには,U1 snRNPと5'スプライス・サイトとの間の特定の相互作用が含まれています.
  • U2 snRNPの分岐点への結合は,複合形成のスプライシングにも重要である.

研究 の 目的:

  • U2 snRNPとプレ-mRNAとの相互作用に関する要件を調査する.
  • U2 snRNPの結合とスプライシングの複合組成に必要な要因を特定する.

主な方法:

  • 浄化されたU1 snRNPと部分的に浄化されたU2 snRNPの結合分析.
  • U2AFの活性性を特徴付けるためのRNA基板排除および競争アッセイ.

主要な成果:

  • 部分的に浄化されたU2 snRNP単独では,その標的のプレ-mRNA配列に結合することができなかった.
  • 新しい活性であるU2補助因子 (U2AF) は,U2のsnRNPと分岐点の相互作用に不可欠であると特定されました.
  • U2AFは,U2 snRNPがブランチポイントに結合する前に,3' スプライスサイト領域に結合します.

結論:

  • U2AFは,U2 snRNPがブランチポイントに結合するために必要な構成要素です.
  • U2 snRNP結合における3'スプライスサイト領域の役割は,U2AFメディエーションによって説明されています.
  • この発見は,pre-mRNA splicingの開始における重要なステップを明らかにしています.