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Related Concept Videos

MicroRNAs01:22

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
MicroRNAs01:22

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...

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MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method
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Transient assays for the analysis of miRNA processing and function.

Felipe F de Felippes1, Detlef Weigel

  • 1Max Planck Institute for Developmental Biology, Tübingen, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|October 6, 2009
PubMed
Summary

Agroinfiltration using Agrobacterium tumefaciens offers a rapid method for plant gene expression analysis. This protocol details using this technique for efficient small RNA and microRNA (miRNA) processing studies in Nicotiana benthamiana.

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Area of Science:

  • Plant molecular biology
  • Genetics and genomics
  • Biotechnology

Background:

  • Transient gene expression assays offer a faster alternative to stable plant transformation.
  • Agroinfiltration, utilizing Agrobacterium tumefaciens, is a common method for delivering transgenes into plant cells, particularly Nicotiana benthamiana.
  • This technique is widely applied in plant science for various applications, including small RNA analysis.

Purpose of the Study:

  • To present a detailed protocol for analyzing microRNA (miRNA) processing.
  • To demonstrate the utility of agroinfiltration for rapid assessment of miRNA biogenesis in plants.
  • To provide researchers with a reproducible method for studying small RNA pathways.

Main Methods:

  • Agroinfiltration of Nicotiana benthamiana leaves with Agrobacterium tumefaciens carrying specific transgenes.
  • Delivery of genetic material into plant cells for transient expression.
  • Subsequent analysis of small RNA populations, focusing on miRNA processing intermediates.

Main Results:

  • Successful transient expression of transgenes in Nicotiana benthamiana leaf cells via agroinfiltration.
  • Demonstration of the method's efficiency in capturing miRNA processing events.
  • Generation of results within a few days post-inoculation, highlighting the speed of the technique.

Conclusions:

  • Agroinfiltration provides a rapid and effective approach for studying miRNA processing in plants.
  • This protocol enables timely analysis of small RNA pathways, complementing stable transformation methods.
  • The described method is valuable for researchers investigating gene regulation by small RNAs in diverse plant systems.