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Related Experiment Video

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Detection of Protein Interactions in Plant using a Gateway Compatible Bimolecular Fluorescence Complementation BiFC System
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Functional Validation of Transcriptionally Active Microproteins/sORFs In Planta.

Ashish Sharma1,2, Prabodh Kumar Trivedi3,4

  • 1CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow, Uttar Pradesh, India.

Methods in Molecular Biology (Clifton, N.J.)
|November 16, 2025
PubMed
Summary

Researchers are discovering small plant molecules like microproteins (miPs) and microRNA-encoded peptides (miPEPs). A new GUS reporter assay offers a cost-effective way to validate these important molecules in plants.

Keywords:
Alternative transcriptGUS (β-glucuronidase)Hormonal signallingMicroproteinsORFSmall peptidesStress responsesmiPEP

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Area of Science:

  • Plant biotechnology
  • Molecular biology
  • Genomics

Background:

  • Recent advancements in sequencing and bioinformatics enable the identification of previously overlooked small molecules in plants.
  • Small molecules, including microproteins (miPs) and microRNA-encoded peptides (miPEPs), are vital for plant growth, development, stress responses, and metabolism.
  • Characterizing these molecules is challenging due to limitations of traditional validation methods.

Purpose of the Study:

  • To present an efficient and cost-effective method for validating small peptides and open reading frames (ORFs) in planta.
  • To overcome the limitations of traditional validation techniques like western blotting and protein sequencing.
  • To accelerate the functional characterization of novel small molecules and genes in plants.

Main Methods:

  • Utilizing promoter-reporter lines with a reporter gene, such as β-glucuronidase (GUS).
  • Employing the GUS assay for direct visualization of gene activity in plant tissues.
  • Validating transcriptionally active small peptides/ORFs and alternative transcripts.

Main Results:

  • The GUS assay provides a simplified and efficient approach for validating candidate small peptides/ORFs.
  • This method facilitates the direct visualization of gene expression patterns in planta.
  • The approach is more cost-effective and less labor-intensive than traditional methods for large-scale studies.

Conclusions:

  • Promoter-GUS reporter assays offer a powerful tool for validating small plant molecules and alternative transcripts.
  • This method accelerates the functional characterization of novel genes, advancing plant research.
  • The approach has significant implications for plant biotechnology and understanding plant biology.