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Ribosomes01:27

Ribosomes

77.9K
Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that synthesize large quantities of protein—such as secretory cells in the human pancreas—can contain millions of ribosomes.
Ribosome Structure and Assembly
Ribosomes are composed of ribosomal RNA (rRNA) and proteins. In eukaryotes, rRNA is transcribed from genes in the nucleolus—a part of the nucleus that specializes in ribosome...
77.9K
Ribosomes01:27

Ribosomes

11.1K
Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that synthesize large quantities of protein—such as secretory cells in the human pancreas—can contain millions of ribosomes.
Ribosome Structure and Assembly
Ribosomes are composed of ribosomal RNA (rRNA) and proteins. In eukaryotes, rRNA is transcribed from genes in the nucleolus—a part of the nucleus that specializes in ribosome...
11.1K
Types of Genetic Transfer Between Organisms02:18

Types of Genetic Transfer Between Organisms

31.1K
Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
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Types of Genetic Transfer Between Organisms02:18

Types of Genetic Transfer Between Organisms

6.5K
6.5K
Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

14.9K
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,...
14.9K
Cell Specific Gene Expression01:58

Cell Specific Gene Expression

16.6K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
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Translating Ribosome Affinity Purification TRAP to Investigate Arabidopsis thaliana Root Development at a Cell Type-Specific Scale
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RiboBrightは,リボソームの組織と運動における細胞タイプ固有の違いを明らかにしています.

Georgia Poulladofonou1, Carmen Grandi1,2, Xinyu Hu1,2

  • 1Institute for Molecules and Materials, Radboud University, Nijmegen, the Netherlands.

Nature communications
|February 13, 2026
PubMed
まとめ

研究者らは,ユカリオットのリボソームを検出する光探知機であるRiboBrightを開発した. このツールは,リボソームの含有量,組織,および生体および固定細胞の動きの正確な測定と追跡を可能にします.

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Investigating Tissue- and Organ-specific Phytochrome Responses using FACS-assisted Cell-type Specific Expression Profiling in Arabidopsis thaliana
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Investigating Tissue- and Organ-specific Phytochrome Responses using FACS-assisted Cell-type Specific Expression Profiling in Arabidopsis thaliana

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関連する実験動画

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Translating Ribosome Affinity Purification TRAP to Investigate Arabidopsis thaliana Root Development at a Cell Type-Specific Scale
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科学分野:

  • 分子生物学は分子生物学である.
  • 細胞生物学 細胞生物学
  • バイオケミストリー バイオケミストリー

背景:

  • リボソームは,すべての生物のタンパク質合成に不可欠です.
  • リボソームのダイナミクス,組織,および翻訳活動の理解は,それらの複雑な役割を解読する鍵です.
  • リボソームを研究する現在の方法は,範囲と応用が限られている可能性があります.

研究 の 目的:

  • 選択的ラベル付けと真核リボソームのイメージングのための新しい光プローブ,RiboBrightを開発する.
  • リボブライトのリボソーム含有量を定量化し,様々な細胞のリボソーム動態を追跡する有用性を実証する.
  • 細胞分化中のリボソーム特性の系統特有の変化を調査する.

主な方法:

  • シクロヘキシミドのC-H活性化と光変化によるRiboBrightの合成.
  • リボブライトの適用は,顕微鏡検査とリボソーム定量化のためのフローサイトメトリ.
  • RiboBrightを活体細胞と固定細胞で動きを追跡し,サブマイクロメートルの構造を視覚化するために利用する.

主要な成果:

  • RiboBrightは,10の異なる細胞系におけるリボソームの含有量を数値化することに成功しました.
  • この探査機は,生細胞におけるリボソームの動きをリアルタイムで追跡し,固定細胞におけるリボソームの組織を視覚化することが可能になった.
  • RiboBrightは,内皮と外皮の系統に微分化する際に,リボソームの内容,組織,および運動の明確なパターンを明らかにしました.

結論:

  • RiboBrightは,真核リボソームを研究するための多用途で効果的な光センサーです.
  • 探査機は,単細胞レベルでの細胞リボソームのダイナミクスの詳細なイメージングを容易にする.
  • RiboBrightは,リボソーム生物学とその細胞プロセスへの影響を調査するための便利なアプローチを提供します.