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Related Concept Videos

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,...
RNA Interference01:23

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
RNA Interference01:23

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
Types of RNA01:20

Types of RNA

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 regulating 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 Performs Diverse...
Types of RNA01:23

Types of RNA

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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Enhanced Northern Blot Detection of Small RNA Species in Drosophila Melanogaster
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Published on: August 21, 2014

Ageing and the small, non-coding RNA world.

Masaomi Kato1, Frank J Slack

  • 1Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06520, USA.

Ageing Research Reviews
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Summary
This summary is machine-generated.

MicroRNAs and other small RNAs regulate lifespan and aging. These molecules ensure robust gene regulation, maintaining stability during development and aging processes.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Developmental Biology

Background:

  • MicroRNAs (miRNAs) are small, non-coding RNAs crucial for biological processes, including development and disease.
  • Emerging evidence links miRNAs to lifespan determination in model organisms like Caenorhabditis elegans and Drosophila, suggesting a role in aging.
  • Novel regulatory RNAs, such as tRNA cleavage fragments, inhibit translation under stress.

Purpose of the Study:

  • To explore the multifaceted roles of small RNAs in biological regulation.
  • To investigate the involvement of microRNAs and other small RNA fragments in the aging process.
  • To understand how RNA editing pathways and gene regulatory networks contribute to developmental and aging robustness.

Main Methods:

  • Review of current literature on microRNA function and aging.
  • Analysis of studies on small RNA fragments and their regulatory mechanisms.
  • Examination of the interplay between RNA editing, RNA interference, and aging.

Main Results:

  • MicroRNAs are essential regulators of lifespan in model organisms.
  • Stress-induced RNA fragments, like tRNA fragments, act as translational inhibitors.
  • RNA editing pathways may suppress RNA interference during aging.

Conclusions:

  • Multiple layers of gene regulation involving small RNAs contribute to robust development and aging.
  • Small non-coding RNAs play critical roles in maintaining genetic pathway stability and flexibility.
  • Understanding these regulatory networks is key to comprehending aging processes.