関連する実験動画
Updated: Jun 2, 2026
08:07
Single Molecule Fluorescence Energy Transfer Study of Ribosome Protein Synthesis
Published on: July 6, 2021
50Sリボソームにおける修正ヘリックス69の構成状態を50Sリボソームで探知する
Yogo Sakakibara1, Christine S Chow
1Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
Journal of the American Chemical Society
|May 12, 2011
まとめ
リボソームヘリックス69の改変された核酸は,その構造と動力学に影響を与えます. この研究では,偽ウリジン改変と環境要因が,翻訳中のリボソーム機能にどのように影響するか明らかにしています.
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
- 構造生物学 構造生物学とは
背景:
- 翻訳中のリボソームのダイナミクスは,タンパク質合成に不可欠です.
- リボソーム機能におけるプセウドウリジンなどの改変核酸の役割は,依然としてほとんど不明である.
- 23S rRNAのヘリックス69は,非特徴化された改変核酸を持つ重要な構造要素である.
研究 の 目的:
- ヘリックス69の構造とダイナミクスに対する偽ウリジン改変の影響を調査する.
- 環境要因がヘリックス69の形状とアクセシビリティにどのように影響するか理解する.
- リボソーム活動における改変核酸の役割を明らかにする.
主な方法:
- ディメチル硫酸塩を用いたリボソーム探査実験.
- ヘリックス69における塩基アクセシビリティとヌクレオチド構成の分析 69.
- pH,温度,およびマグネシウムイオンの影響を調査する.
主要な成果:
- ヘリックス69の特定のベースアクセシビリティは,pH,温度,マグネシウムによって調節されます.
- 偽ウリジンの改変により,核酸の形状がはっきりと変化します.
- 環境的要因と変更は,ヘリックス 69 構造に差異的に影響します.
結論:
- 偽ウリジンの改変は,ヘリックス69の構造と動態を調節する上で重要な役割を果たします.
- 環境条件と改変した核酸は協力してリボソームの形状に影響を与えます.
- これらのダイナミクスを理解すると,リボソームの機能と調節に関する洞察が得られます.
関連する概念動画
02:24Ribosome Profiling
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
01:34Directing Proteins to the Rough Endoplasmic Reticulum
The organelle-specific signaling sequences direct proteins synthesized in the cytosol to their final destination like ER, mitochondria, peroxisomes, etc. Some of the proteins directed to ER are then trafficked via vesicles to other organelles within the cell or the extracellular environment through the Golgi complex. For example, the rough ER synthesizes soluble proteins for transportation to the lysosomes or secretion out of the cell. It can also synthesize transmembrane proteins that can...
01:26Bacterial Protein Maturation
Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...
01:44Termination of Translation
The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
02:53Ribosomal 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,...
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,...
02:53Ribosomal 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,...
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,...