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Updated: Apr 25, 2026

Characterization of Membrane Transporters by Heterologous Expression in E. coli and Production of Membrane Vesicles
Published on: December 31, 2019
Trans-species complementation analysis to study function conservation of plant Endosomal Sorting Complex Required for
1Facultad Ciencias Biológicas, Centro de Biotecnología Vegetal, Universidad Andrés Bello, República 217, Santiago, Chile, francisca.reyes.marquez@gmail.com.
This study introduces a new assay to test if plant Endosomal Sorting Complex Required for Transport (ESCRT) proteins can perform the same functions as yeast ESCRT proteins. The assay uses fluorescent proteins to visualize cargo sorting in yeast ESCRT mutants expressing plant ESCRT genes.
Area of Science:
- Cell Biology
- Molecular Biology
- Plant Science
Background:
- Endosomal Sorting Complex Required for Transport (ESCRT) proteins are crucial for protein sorting at multivesicular bodies (MVBs).
- Understanding the conserved functions of ESCRT proteins across species is vital for deciphering cellular transport mechanisms.
Purpose of the Study:
- To develop and validate an assay for evaluating the conserved endosomal sorting functions of plant ESCRT proteins.
- To assess the functional conservation of plant ESCRT orthologues using a trans-species complementation approach in yeast.
Main Methods:
- Development of a trans-species complementation assay.
- Utilizing a fluorescently tagged cargo protein (carboxypeptidase S fused to GFP) to monitor MVBs.
- Expressing putative plant ESCRT orthologues in yeast ESCRT-deficient mutants.
Main Results:
- The assay successfully visualizes the sorting of a biosynthetic cargo protein in yeast.
- The methodology allows for the assessment of functional complementation by plant ESCRT proteins.
Conclusions:
- The described assay provides a robust platform for investigating the conserved roles of plant ESCRT proteins in endosomal sorting.
- This approach facilitates comparative studies of ESCRT machinery across different eukaryotic kingdoms.
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