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Updated: Jun 6, 2026
11:55
Membrane Transport Processes Analyzed by a Highly Parallel Nanopore Chip System at Single Protein Resolution
Published on: August 16, 2016
A molecular framework for coupling cellular volume and osmotic solute transport control
Annegret Honsbein1, Michael R Blatt, Christopher Grefen
1Laboratory of Plant Physiology and Biophysics, Institute of Molecular, Cellular and Systems Biology, Bower Building, University of Glasgow, Glasgow G12 8QQ, UK.
Journal of Experimental Botany
|December 1, 2010
Summary
Cell growth relies on coordinated ion uptake and vesicle traffic. New research reveals interactions between ion channels and vesicle proteins, offering insights into cellular homeostasis and plant water use.
Area of Science:
- Cell Biology
- Plant Biology
- Biochemistry
Background:
- Eukaryotic cell expansion requires vesicle traffic to increase membrane surface area.
- Cellular expansion in walled eukaryotes is driven by turgor pressure, fundamentally dependent on inorganic ion accumulation.
- Coordinated control of ion uptake and vesicle traffic is essential for cell growth, but the underlying mechanisms remain poorly understood.
Purpose of the Study:
- To explore the coordination between ion transport and vesicle traffic in eukaryotic cell growth.
- To identify key protein interactions mediating this coordination at vital membranes.
- To provide insights into cellular homeostasis and potential applications in plant mineral and water use.
Main Methods:
- Review of recent discoveries in model organisms (Arabidopsis and yeast).
- Identification of protein partners at membranes controlling cell volume and turgor.
- Experimental evidence for interactions between Arabidopsis Kv-like K(+) channels and the vesicle-trafficking protein SYP121.
Main Results:
- Identified key protein interactions linking ion transport and vesicle trafficking.
- Demonstrated a wider role for Arabidopsis Kv-like K(+) channels in interacting with SYP121.
- Highlighted common paradigms for understanding the connection between ion transport and membrane traffic.
Conclusions:
- Interactions between trafficking and ion transport proteins offer a new approach to understanding cellular coordination.
- These findings advance our knowledge of cellular homeostasis in eukaryotes.
- Understanding these mechanisms has implications for cell proliferation, development, pathogenesis, and plant environmental adaptation.
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