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関連する概念動画

Bacterial RNA Polymerase00:43

Bacterial RNA Polymerase

Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
Eukaryotic RNA Polymerases00:58

Eukaryotic RNA Polymerases

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...
Ribosomal RNA Synthesis02:53

Ribosomal 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,...
Bacterial RNA Polymerase00:43

Bacterial RNA Polymerase

Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
Eukaryotic RNA Polymerases00:58

Eukaryotic RNA Polymerases

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...
Ribosomal RNA Synthesis02:53

Ribosomal 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,...

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関連する実験動画

Updated: Jul 13, 2026

Studying RNA Interactors of Protein Kinase RNA-Activated during the Mammalian Cell Cycle
10:05

Studying RNA Interactors of Protein Kinase RNA-Activated during the Mammalian Cell Cycle

Published on: March 5, 2019

E. coli RNAase Pには,必要とされるRNA成分がある.

R Kole, M F Baer, B C Stark

    Cell
    |April 1, 1980
    PubMed
    まとめ

    リボヌクレアゼP (RNAアゼP) のタンパク質またはRNA成分の変異は,E. coliの熱感を引き起こす可能性があります. この研究は,変異株の熱不活性化に起因する特定の構成要素の欠陥を特定します.

    科学分野:

    • 分子生物学は分子生物学である.
    • 酵素学 酵素学とは
    • 微生物の遺伝学

    背景:

    • リボヌクレアゼP (RNAase P) は,細菌のtRNA成熟に不可欠である.
    • E. coli の熱感性突然変異は,RNAase P.機能に影響を与える可能性があります.
    • RNAase Pの熱感性を理解することで,酵素の構造と機能の関係に関する洞察が得られます.

    研究 の 目的:

    • E. coli. の熱感性RNAase P変異体における熱性無活性化の分子基礎を調査する.
    • タンパク質またはRNAの成分が熱感性に関与するかどうかを判断する.
    • 特定の変異株とそのリバータンからRNAase P酵素を特徴付ける.

    主な方法:

    • 野生型および3つの熱感性のE. coli菌株からのRNAase Pの部分浄化.
    • 浄化されたRNAase P製剤の熱不活性化特性の決定.
    • RNAase PをRNAおよびタンパク質成分に分離し,in vitroで再構成する.
    • RNAコンポーネントの量とタンパク質コンポーネントのチャージの分析.

    主要な成果:

    • ts241からのRNAase Pのタンパク質成分とts709からのRNA成分は,熱感性を与える.

    さらに関連する動画

    Artificial RNA Polymerase II Elongation Complexes for Dissecting Co-transcriptional RNA Processing Events
    10:59

    Artificial RNA Polymerase II Elongation Complexes for Dissecting Co-transcriptional RNA Processing Events

    Published on: May 13, 2019

    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

    関連する実験動画

    Last Updated: Jul 13, 2026

    Studying RNA Interactors of Protein Kinase RNA-Activated during the Mammalian Cell Cycle
    10:05

    Studying RNA Interactors of Protein Kinase RNA-Activated during the Mammalian Cell Cycle

    Published on: March 5, 2019

    Artificial RNA Polymerase II Elongation Complexes for Dissecting Co-transcriptional RNA Processing Events
    10:59

    Artificial RNA Polymerase II Elongation Complexes for Dissecting Co-transcriptional RNA Processing Events

    Published on: May 13, 2019

    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

  • ts709変異体は,ワイルド型とts241.1.と比較して,RNA成分を少量に示しています.
  • リバータント株 (A49) は,RNAase Pタンパク質成分に変化した電荷を示しています.

    • 結論:

    • RNAase Pのタンパク質またはRNA成分に影響する変異は,熱感性につながる可能性があります.
    • これらの成分変異によって,in vivoおよびin vitroの両方の熱感性が与えられます.
    • RNAase Pの熱感性は,そのタンパク質またはRNAサブユニットのいずれかの欠陥と関連しています.