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Water self-diffusion behavior in yeast cells studied by pulsed field gradient NMR
Ki-Jeong Suh1, Young-Shick Hong, Vladimir D Skirda
1Graduate School of Biotechnology, Korea University, 1, 5-ka, Anam-dong, Sungbuk-ku, Seoul 136-701, South.Korea
Biophysical Chemistry
|July 2, 2003
Summary
Water diffusion in yeast cells shows restricted movement within intracellular and extracellular spaces. Cell size and permeability change with growth, impacting water transport dynamics.
Area of Science:
- Biophysics
- Cell Biology
Background:
- Water is essential for cellular functions.
- Understanding water transport in cells is crucial for various biological processes.
Purpose of the Study:
- To investigate water self-diffusion behavior in yeast cell suspensions.
- To characterize different water populations and their diffusion properties.
- To determine how yeast cell growth phase affects water diffusion and permeability.
Main Methods:
- Pulsed field gradient nuclear magnetic resonance (PFG-NMR) techniques were employed.
- Self-diffusion coefficients of water were measured.
- Cell size and permeability were analyzed across different growth phases.
Main Results:
- Three distinct water populations were identified: bulk, extracellular, and intracellular.
- Intracellular and extracellular water diffusion were restricted, with characteristic region sizes.
- Yeast cell size increased, while permeability decreased with prolonged incubation time.
- Measured cell permeabilities showed good agreement between two independent methods.
Conclusions:
- Water diffusion in yeast cells is spatially restricted.
- Cellular growth significantly influences water permeability and diffusion characteristics.
- PFG-NMR is a valuable tool for studying water dynamics in biological systems.