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One-channel Cell-attached Patch-clamp Recording
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Modes of glutamate receptor gating
1Department of Biochemistry, School of Medicine and Biomedical Sciences, University at Buffalo, SUNY, Buffalo, NY 14214, USA. popescu@buffalo.edu
The Journal of Physiology
|November 23, 2011
Summary
Modal gating in glutamate receptors, involving slow ion channel transitions, significantly impacts synaptic transmission speed. This review explores evidence and mechanisms of these slow gating events in neuronal communication.
Area of Science:
- Neuroscience
- Biophysics
- Computational Biology
Background:
- Excitatory synaptic currents are crucial for fast neuronal communication.
- Glutamate-activated channels mediate these currents, with their dynamics encoded in channel behavior.
- Early models simplified channel states, but single-molecule studies revealed complex kinetics.
Purpose of the Study:
- To review evidence for modal gating in glutamate receptors.
- To explore hypotheses on the mechanisms of modal shifts.
- To understand the impact of modal gating on synaptic transmission.
Main Methods:
- Review of existing literature on glutamate receptor kinetics.
- Analysis of single-molecule patch-clamp data.
- Examination of mathematical modeling approaches.
Main Results:
- Single-molecule observations reveal complex, multi-timescale transitions in glutamate receptors.
- Modal gating, characterized by slow transitions, is increasingly recognized in glutamate receptors.
- Current research focuses on relating these slow events to receptor structure and physiological control.
Conclusions:
- Modal gating represents a significant factor in the kinetics of glutamate receptors.
- Understanding modal gating mechanisms is key to comprehending synaptic transmission dynamics.
- Further research is needed to elucidate the physiological relevance and control of modal gating.
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