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Measuring Plant Protein Secretion.

Emily R Larson1

  • 1Laboratory of Plant Physiology and Biophysics, University of Glasgow, Glasgow, G12 8QQ, UK. emily.larson@glasgow.ac.uk.

Methods in Molecular Biology (Clifton, N.J.)
|September 2, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed two methods using fluorescent protein fusions to measure protein secretion in plants. These techniques help visualize and quantify defects in the plant secretion pathway, aiding in plant biology research.

Keywords:
Confocal microscopyFluorescence quantificationMulticistronic expression vectorsOptobiologyProtein secretionTransient expression

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Area of Science:

  • Plant molecular biology
  • Cellular and subcellular imaging
  • Protein secretion pathways

Background:

  • Fluorescent protein fusions are essential for visualizing protein localization and mobility.
  • Diverse fluorescent markers, expression vectors, and photoactivated molecules offer various research applications.
  • Understanding protein secretion is crucial for plant development and stress response.

Purpose of the Study:

  • To describe methodologies for quantifying protein secretion using fluorescent protein fusions in plants.
  • To provide tools for visualizing defects in the plant secretion pathway.
  • To enable quantitative analysis of protein secretion in both seedling roots and mature plant leaves.

Main Methods:

  • Protocol 1: Transiently expressing fluorescent markers in seedling roots to quantify secretion blocks.
  • Protocol 2: Measuring fluorescent marker secretion into the apoplast in plant leaves, using stable expression under an inducible promoter.
  • Utilizing multicistronic constructs for transient transformation in seedling roots.

Main Results:

  • Established two distinct protocols for quantifying protein secretion in Arabidopsis.
  • Demonstrated the ability to measure both blocked secretion (in roots) and active secretion (in leaves).
  • Provided visualization tools for identifying defects in cellular secretion pathways.

Conclusions:

  • The described methods offer robust tools for quantitative analysis of protein secretion in plants.
  • These techniques facilitate the study of secretion pathway dynamics and identify potential secretion defects.
  • The protocols are applicable to Arabidopsis, a model organism in plant science research.