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Related Concept Videos

Translational Regulation01:29

Translational Regulation

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Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
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RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
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piRNA - Piwi-interacting RNAs02:57

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Related Experiment Videos

Small RNAs in development - insights from plants.

Xuemei Chen1

  • 1Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, CA 92521, United States. xuemei.chen@ucr.edu

Current Opinion in Genetics & Development
|May 15, 2012
PubMed
Summary

Plant microRNAs (miRNAs) and small interfering RNAs (siRNAs) regulate development. Recent research highlights conserved principles in their biogenesis and function, drawing parallels with animal small RNA pathways.

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Area of Science:

  • Plant molecular biology
  • Genetics
  • Developmental biology

Background:

  • microRNAs (miRNAs) and small interfering RNAs (siSIRNAs) are key endogenous small RNAs in plants, crucial for gene and genome regulation.
  • Plants possess an expanded repertoire of siRNAs, with some fulfilling functions analogous to animal Piwi-interacting RNAs (piRNAs).
  • Small RNA research in plants offers insights into conserved molecular mechanisms of small RNA biogenesis and action.

Purpose of the Study:

  • To review recent advancements in plant small RNA research over the past two years.
  • To emphasize findings related to plant development.
  • To focus on overarching principles derived from studies and compare plant and animal small RNA systems.

Main Methods:

  • Review of recent scientific literature on plant small RNAs.
  • Analysis of conserved molecular logic in small RNA biogenesis and function.
  • Comparative analysis of plant and animal small RNA pathways.

Main Results:

  • Recent studies have elucidated major principles governing plant small RNA pathways.
  • Parallels are drawn between plant siRNAs and animal piRNAs in terms of function.
  • The conserved molecular logic of small RNA biology is evident in plants.

Conclusions:

  • Plant small RNAs, particularly miRNAs and siRNAs, play critical roles in development.
  • Recent research underscores conserved mechanisms and functional analogies between plant and animal small RNA systems.
  • The study of plant small RNAs continues to yield fundamental insights into gene regulation.