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Published on: May 12, 2023
Plant endosomal trafficking pathways.
Francisca C Reyes1, Rafael Buono, Marisa S Otegui
1Department of Botany, University of Wisconsin-Madison, Madison, WI 53706, United States.
Current Opinion in Plant Biology
|August 9, 2011
Summary
Endosomes manage plasma membrane protein recycling and degradation in plants. Key molecular complexes like retromer and ESCRTs, along with protein modifications, are crucial for plant endosomal trafficking and development.
Area of Science:
- Plant cell biology
- Molecular and Cellular Biology
- Biochemistry
Background:
- Endosomes are central to regulating plasma membrane protein turnover, influencing cellular responses.
- In plants, the trans-Golgi network (TGN) and prevacuolar compartments/multivesicular bodies (MVBs) are key endosomal stations.
- Endosomal trafficking machinery, including retromer and Endosomal Sorting Complexes Required for Transport (ESCRTs), has conserved and specialized roles in plants.
Purpose of the Study:
- To review the conserved and specialized functions of endosomal trafficking complexes in plants.
- To highlight the roles of retromer and ESCRTs in plant endosomal sorting and protein trafficking.
- To discuss the impact of post-translational modifications on plant endosomal protein sorting.
Main Methods:
- Literature review of recent studies on plant endosomal trafficking.
- Analysis of conserved and specialized functions of molecular complexes.
- Examination of the role of protein modifications in sorting.
Main Results:
- Retromer is established to recycle vacuolar sorting receptors (VSRs) and modulate plasma membrane protein trafficking in plants.
- Arabidopsis ESCRT components are essential for plant cytokinesis, development, and vacuolar organization.
- Phosphorylation and ubiquitination of plant plasma membrane proteins serve as sorting signals for endosomal trafficking.
Conclusions:
- Endosomal trafficking is vital for plant cellular processes, involving conserved and plant-specific mechanisms.
- Molecular complexes like retromer and ESCRTs, alongside protein modifications, are critical regulators of protein sorting.
- Understanding these pathways is key to deciphering plant development and cellular responses.
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