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関連する概念動画

Viruses of Archaea01:29

Viruses of Archaea

75
Archaeal viruses play a crucial role in the ecosystems of extremophilic archaea, particularly those belonging to the phyla Euryarchaeota and Crenarchaeota. By shaping host evolution and facilitating gene transfer, these viruses influence microbial communities and contribute to genetic diversity in extreme environments. The archaea they infect thrive in acidic hot springs and hydrothermal vents characterized by high temperatures and low pH. Archaeal viruses exhibit remarkable structural...
75
Surface Appendages of Archaea01:23

Surface Appendages of Archaea

147
Archaeal surface appendages are highly specialized structures essential for environmental adaptation, encompassing roles in adhesion, biofilm formation, and motility. Among these appendages, pili and archaella stand out for their distinct morphologies and functionalities, enabling archaea to thrive in diverse and often extreme environments.Pili: Adhesion and Biofilm FormationPili are filamentous structures assembled from pilin protein subunits, primarily contributing to adhesion and biofilm...
147
Ribosomal RNA Synthesis02:53

Ribosomal RNA Synthesis

13.4K
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,...
13.4K
Diversity of Archaea III01:27

Diversity of Archaea III

71
Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like...
71
Nucleoid01:24

Nucleoid

156
The nucleoid represents a structurally and functionally distinct region within prokaryotic cells, where the cell's DNA and associated proteins are housed. Unlike eukaryotic cells, prokaryotes lack a membrane-bound nucleus, and the nucleoid facilitates the organization and accessibility of the genetic material within this constraint. The DNA in most bacteria and archaea exists as a single, circular, double-stranded molecule that is highly compacted through supercoiling and interactions with...
156
Eukaryotic RNA Polymerases00:58

Eukaryotic RNA Polymerases

24.6K
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.
All three eukaryotic RNAPs require specific transcription factors, of which the...
24.6K

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Updated: Sep 9, 2025

Identification of Circular RNAs using RNA Sequencing
08:25

Identification of Circular RNAs using RNA Sequencing

Published on: November 14, 2019

12.4K

アルカイアにおける円形RNA

Hubert F Becker1,2, Sébastien Ferreira-Cerca3

  • 1Laboratoire d'Optique et Biosciences (CNRS UMR7645, INSERM U1182), École Polytechnique, Institut polytechnique de Paris, Palaiseau, France. hubert.becker@polytechnique.edu.

Advances in experimental medicine and biology
|August 31, 2025
PubMed
まとめ
この要約は機械生成です。

円形RNAは数十年前から知られていましたが 考古学では最近の研究されています この章では,古物種における円形の前リボソームRNAとボックスC/DRNAに焦点を当てて,それらの生物学をレビューします.

キーワード:
アーカイアボックス C/D RNA円形のRNARNAリガゼrRNA についてスノRNA

さらに関連する動画

Use of Alu Element Containing Minigenes to Analyze Circular RNAs
13:10

Use of Alu Element Containing Minigenes to Analyze Circular RNAs

Published on: March 10, 2020

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In Silico Identification and Characterization of circRNAs During Host-Pathogen Interactions
10:27

In Silico Identification and Characterization of circRNAs During Host-Pathogen Interactions

Published on: October 21, 2022

1.6K

関連する実験動画

Last Updated: Sep 9, 2025

Identification of Circular RNAs using RNA Sequencing
08:25

Identification of Circular RNAs using RNA Sequencing

Published on: November 14, 2019

12.4K
Use of Alu Element Containing Minigenes to Analyze Circular RNAs
13:10

Use of Alu Element Containing Minigenes to Analyze Circular RNAs

Published on: March 10, 2020

7.4K
In Silico Identification and Characterization of circRNAs During Host-Pathogen Interactions
10:27

In Silico Identification and Characterization of circRNAs During Host-Pathogen Interactions

Published on: October 21, 2022

1.6K

科学分野:

  • 分子生物学
  • ゲノミクス
  • 考古学研究

背景:

  • 円形RNA (circRNAs) は40年以上前から知られている.
  • 最近の研究で 広範囲にわたる 系統遺伝子の分布が明らかになりました
  • ほとんどの研究は真核細胞の circRNA に焦点を当てており,考古学的 circRNA は十分に研究されていない.

研究 の 目的:

  • 古代生物における円形RNA発見の概要を提示する.
  • 考古学的な円形RNA生物学に関する現在の知識を要約する.
  • 円形のリボソーム前RNAとボックスC/DRNAのような特定の例を強調します.

主な方法:

  • 考古学的なcircRNAに関する既存の研究の文献レビューと合成.
  • 報告された分子メカニズムと機能の分析
  • 特定のアーカイアルRNAタイプに集中する.

主要な成果:

  • 円形のRNAは様々な考古学的な系統で確認されている.
  • 主要な例は,円形前リボソームRNAとボックスC/DRNAである.
  • 古代生物におけるそれらの生物学的役割の理解は,まだ進行中である.

結論:

  • 円形のRNAは,古生物の保存された分子特性を表しています.
  • 考古生物学におけるそれらの機能とメカニズムを完全に解明するには,さらなる研究が必要です.
  • この章は,考古学的なcircRNA研究のための基礎的なリソースとして機能します.