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相关概念视频

Ribosomes01:27

Ribosomes

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 production. Within...
Ribosomes01:27

Ribosomes

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 AssemblyRibosomes 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 production. Within the...
Ribosomes01:27

Ribosomes

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 production. Within...
Ribosomes01:27

Ribosomes

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 AssemblyRibosomes 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 production. Within 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,...
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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相关实验视频

Updated: Jun 7, 2026

Single Molecule Fluorescence Energy Transfer Study of Ribosome Protein Synthesis
08:07

Single Molecule Fluorescence Energy Transfer Study of Ribosome Protein Synthesis

Published on: July 6, 2021

可视化核糖体生物发生:30S子单元的平行组装路径.

Anke M Mulder1, Craig Yoshioka, Andrea H Beck

  • 1Department of Cell Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.

Science (New York, N.Y.)
|October 30, 2010
PubMed
概括
此摘要是机器生成的。

研究人员使用发现单粒子分析 (DSP) 绘制了30S核糖体子单元的复杂组件. 这揭示了核糖体生物发生的多步骤机制,详细介绍了中间结构及其动态.

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Peering at Brain Polysomes with Atomic Force Microscopy
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In Vitro Reassociation Assay to Measure the Formation of 80S Ribosomal Particles Using Salt-washed Ribosomal Subunits
06:09

In Vitro Reassociation Assay to Measure the Formation of 80S Ribosomal Particles Using Salt-washed Ribosomal Subunits

Published on: December 16, 2025

相关实验视频

Last Updated: Jun 7, 2026

Single Molecule Fluorescence Energy Transfer Study of Ribosome Protein Synthesis
08:07

Single Molecule Fluorescence Energy Transfer Study of Ribosome Protein Synthesis

Published on: July 6, 2021

Peering at Brain Polysomes with Atomic Force Microscopy
08:49

Peering at Brain Polysomes with Atomic Force Microscopy

Published on: March 16, 2016

In Vitro Reassociation Assay to Measure the Formation of 80S Ribosomal Particles Using Salt-washed Ribosomal Subunits
06:09

In Vitro Reassociation Assay to Measure the Formation of 80S Ribosomal Particles Using Salt-washed Ribosomal Subunits

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科学领域:

  • 分子生物学分子生物学
  • 细胞生理学 细胞生理学
  • 结构生物学 结构生物学

背景情况:

  • 核糖体是重要的宏分子机器,通过DNA翻译负责蛋白质合成.
  • 对于细胞生理学来说,理解核糖体生物发生是至关重要的,但组装途径在机理上仍然不清楚.
  • 之前的研究表明,对大肠杆菌30S亚单元的并行组装途径,缺乏详细的机械洞察力.

研究的目的:

  • 阐明大肠杆菌中30S核糖体子单元组合的机制.
  • 识别和结构性地描述组装中间产品及其种群动态.
  • 构建一个包含动力学和结构数据的核糖体生物发生的综合模型.

主要方法:

  • 采用发现单粒子分析 (DSP),一种时间解析的电子显微镜技术.
  • 获取了超过一百万张组装30S子单元的快照.
  • 集成的DSP数据与质谱仪用于多方面的机械分析.

主要成果:

  • 识别和可视化了14种不同的组装中间体的结构.
  • 随着时间的推移,监测这些中间体的种群流动和动态.
  • 开发了第一个详细的核糖体组装机制,包括结合依赖关系和速率常数.

结论:

  • 这项研究为30S核糖体子单元组合提供了一个全面的机制模型.
  • DSP是一种强大的工具,用于剖析复杂的宏分子组装过程.
  • 这些发现推动了我们对核糖体生物发生和细胞功能的理解.