関連する実験動画
Updated: Jul 18, 2026

11:53
Substrate Generation for Endonucleases of CRISPR/Cas Systems
Published on: September 8, 2012
アーカイアにおける小さな核核RNAの同類体
A D Omer1, T M Lowe, A G Russell
1Department of Biochemistry and Molecular Biology, University of British Columbia, 2146 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada.
まとめ
研究者らは,アルカイアで小さな雪のようなRNA (sRNA) を発見し,小さな核核RNA (snoRNA) 誘導のリボソームRNAの改変が,アルカイアとユーカリアの共通の祖先に存在していたことを示唆した.
科学分野:
- 分子生物学は分子生物学である.
- ゲノミクスゲノミクスとは
- 進化生物学の進化生物学について
背景:
- ユーカリオットのリボソームRNA (rRNAs) は,小さな核核RNA (snoRNAs) によって導かれる多数の転写後の修正を受けます.
- アーカイアにおけるスノRNAの存在と機能は,以前は知られていなかった.
研究 の 目的:
- 考古学的なゲノムにおけるsnoRNAの同類体の存在を調査する.
- 古代生物の小さな雪のようなRNA (sRNA) を特定し,特徴づけること.
- スノRNA誘導のrRNA改変の進化的起源を推論する.
主な方法:
- 関連小RNAを隔離するために,アーカイアルフィブリラーリンとNOP56タンパク質の共免疫プレシピテーション.
- Sulfolobus acidocaldarius.から特定された小さな雪のようなRNA (sRNA) のクローニングとシーケンシング.
- 考古学的ゲノムにおける追加のsRNAの in silico識別のための確率モデルの開発.
主要な成果:
- Sulfolobus acidocaldarius.から18個のsRNAがクローンされた.
- CrenarchaeotaとEuryarchaeotaを網羅した7つの考古学的ゲノムに200以上の追加sRNAが特定されました.
- スノRNA遺伝子の同種は,主要考古学分野の両方で発見されました.
結論:
- スノRNA (small nucleolar RNA) 誘導によるrRNA処理は,アルカイアとユーカリアの分岐に先立つ可能性が高い.
- このメカニズムは,アルカイアとユーカリアの最後の共通の祖先に存在し,独特な核の進化に先立ちました.
関連する概念動画
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Nucleic Acids
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
DNA and RNA
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Nucleic Acids
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
Nucleic Acids
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...
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The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms a 5′ to 3′ phosphodiester linkage.
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