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ユカリオットRNAエクソソームの再構成,活動,構造
Quansheng Liu1, Jaclyn C Greimann, Christopher D Lima
1Structural Biology Program, Sloan-Kettering Institute, New York, NY 10021, USA.
Cell
|December 19, 2006
まとめ
RNA処理に不可欠なRNAエクソソームが再構成され,分析されました. その構造と多様な酵素活動は,生化学的分析とX線結晶学によって明らかにされました.
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
- 構造生物学 構造生物学とは
背景:
- RNAエクソソームは,細胞のRNA代謝に関与する重要な3'から5'エクソリボヌクレアース複合体である.
- その構造と機能を理解することは,RNAの処理と分解経路を理解する鍵です.
研究 の 目的:
- 人間と酵母RNAのエクソソーム複合体を再構成し,特徴づけること.
- ユカリオットRNAエクソソームの構造構造と酵素活性を解明する.
主な方法:
- 9サブユニットのヒトおよび酵母エクソソーム,および10および11サブユニットの酵母エクソソームの復元.
- 様々なRNA基板を用いた比較生化学分析.
- 9つのサブユニットからなるヒトエクソソームのX線結晶学.
主要な成果:
- 異なるエクソソーム組成やサブユニットに対して,異なったプロセス・ディストリビューティブ・ヒドロリチス・フォスフォリチス・アクティビティが実証されている.
- 9つのサブユニットのヒトエクソソームのX線構造を3.35 Åの解像度で明らかにしました.
- 保存された表面を特定し,RNAの分解の構造的基礎についての洞察を提供しました.
結論:
- この研究は,RNAエクソソームの構造と機能の包括的な理解を提供します.
- 異なるエクソソーム組成は,様々なRNA処理能力を有する.
- 決定された構造は,RNAの崩壊メカニズムに関する将来の研究のための基盤を提供します.
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関連する概念動画
Types of RNA
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Types of RNA
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Nuclear Export of mRNA
Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
Types of RNA
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
RNA Performs Diverse...
Nuclear Export of mRNA
Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
Types of RNA
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
RNA Performs Diverse...