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相关概念视频

Ribozymes02:47

Ribozymes

13.8K
The term ribozyme is used for RNA that can act as an enzyme. Ribozymes are mainly found in selected viruses, bacteria, plant organelles, and lower eukaryotes. Ribozymes were first discovered in 1982 when Tom Cech’s laboratory observed Group I introns acting as enzymes. This was shortly followed by the discovery of another ribozyme, Ribonulcease P, by Sid Altman’s laboratory. Both Cech and Altman received the Nobel Prize in chemistry in 1989 for their work on ribozymes.
Ribozymes can...
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Ribozymes02:47

Ribozymes

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Types of RNA01:23

Types of RNA

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Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
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Riboswitches01:56

Riboswitches

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Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
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Bacterial RNA Polymerase00:43

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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...
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相关实验视频

Updated: Apr 5, 2026

RIBO-seq in Bacteria: a Sample Collection and Library Preparation Protocol for NGS Sequencing
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RIBO-seq in Bacteria: a Sample Collection and Library Preparation Protocol for NGS Sequencing

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酶-球状核酸

Jessica L Rouge1,2, Timothy L Sita3,2,4, Liangliang Hao3,2

  • 1Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.

Journal of the American Chemical Society
|August 15, 2015
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新型的球形核酸 (SNA) 结构,以稳定 ribozymes,增强其治疗潜力. 这种新型的 ribozyme- SNA 能够有效地向并降低质母细胞中的MGMT,从而提高化疗的敏感性.

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Author Spotlight: Advancements in DNA Nanosensors – Addressing Sensitivity and Selectivity Challenges in Molecular Detection
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科学领域:

  • 生物化学
  • 分子生物学
  • 有关RNA疗法

背景情况:

  • 酶是具有催化活性的RNA分子,能够分裂特定的mRNA序列.
  • 与siRNA和miRNA相比,目前的 ribozyme疗法面临着由于大小和结构不稳定的局限性,阻碍了疗效.
  • 甲基转移酶 (MGMT) 是化学疗法耐药性的关键蛋白质,特别是在多种质母细胞瘤 (GBM) 中.

研究的目的:

  • 使用球形核酸 (SNA) 架构开发一种稳定核酶的新合成策略.
  • 描述 ribozyme-SNA 构造用于向癌细胞中的 MGMT 的治疗潜力.
  • 评估 ribozyme-SNA 在促进细胞亡和使 GBM 细胞对化疗的有效性.

主要方法:

  • 使用球形核酸结构合成 ribozyme-SNA 结合物.
  • 核酶-SNA稳定性和细胞吸收的特征.
  • 在GBM细胞中评估MGMT mRNA裂变和蛋白质淘汰.
  • 评估GBM细胞对治疗诱导的亡的敏感性.

主要成果:

  • 这种新型的 ribozyme-SNA 架构成功地稳定了 ribozymes 的细胞传递和功能.
  • 观察到MGMT全长mRNA的直接分裂,导致显著的MGMT蛋白倒退.
  • 用 ribozyme- SNA 治疗的 GBM 细胞对治疗中介的亡的敏感性增加.
  • 有效的传递和功能可以独立于传统的传染剂.

结论:

  • 球形核酸 (SNA) 架构为稳定 ribozymes 和增强其治疗性提供了一个有前途的策略.
  • 在质母细胞瘤中向MGMT是一种新且有效的方法,有可能克服治疗阻力.
  • 这种创新的化学架构对推进基于RNA的固体瘤治疗具有重大前景.