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関連する概念動画

Protein Complex Assembly02:41

Protein Complex Assembly

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Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

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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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RNA Stability01:53

RNA Stability

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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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RNA Interference01:23

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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
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RNA Splicing01:32

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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...
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Eukaryotic RNA Polymerases

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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.
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RNA-鉄錯体が前生物学的酸素生成を触媒

Ying-Chi Wang1,2, Jing-Hong Tu1,2, Lung-Chih Yu1,2

  • 1Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan.

Communications chemistry
|February 9, 2026
PubMed
まとめ

古代のRNA-鉄錯体は、初期地球の条件下で過酸化水素を酸素と水に分解することを触媒しました。このRNAレドックス活性はタンパク質酵素に先行し、初期生命への洞察を提供します。

キーワード:
RNA鉄錯体触媒酸素生成前生物学的生命起源レドックス活性過酸化水素水初期地球タンパク質酵素酸化ストレス管理分子地球化学生物学的化学宇宙生物学

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Identification of Footprints of RNA:Protein Complexes via RNA Immunoprecipitation in Tandem Followed by Sequencing RIPiT-Seq
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Identification of Footprints of RNA:Protein Complexes via RNA Immunoprecipitation in Tandem Followed by Sequencing RIPiT-Seq
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科学分野:

  • 生命の起源研究
  • 生化学
  • 宇宙生物学

背景:

  • 酸素発生型光合成は酸素の出現と関連しています。
  • 初期生命は、過酸化水素（H2O2）のような反応性酸素種を管理する課題に直面しました。
  • 初期地球では、非生物学的プロセスがH2O2を生成する可能性がありました。

研究 の 目的:

  • 初期地球の酸化ストレス管理におけるRNAの潜在的な役割を調査しました。
  • RNA-金属錯体の触媒活性を探求しました。
  • タンパク質酵素の前にH2O2解毒のメカニズムを提案しました。

主な方法:

  • RNA-亜鉄（Fe2+）錯体を研究しました。
  • H2O2のO2とH2Oへの触媒酸化を評価しました。
  • 嫌気性初期地球の条件をシミュレートしました。

主要な成果:

  • 特定のRNA分子がFe2+と協調してH2O2の酸化を触媒しました。
  • この反応は、嫌気性条件下でO2とH2Oを生成しました。
  • タンパク質酵素に先行するRNAベースのレドックス活性を実証しました。

結論:

  • RNA-金属錯体は、H2O2の解毒と酸化ストレス管理に役立った可能性が高いです。
  • RNA-鉄錯体は、地球化学的酸化剤と初期の生物学的レドックス化学との間の分子的なつながりを提供します。
  • RNAの触媒機能は、初期生命の生存にとって重要であった可能性があります。