Related Experiment Video
Updated: Nov 4, 2025
10:14
Recapitulation of an Ion Channel IV Curve Using Frequency Components
Published on: February 8, 2011
13.7K
Memory in Ion Channel Kinetics
M P Silva1, C G Rodrigues2, W A Varanda3
1Department of Animal Morphology and Physiology, Federal Rural University of Pernambuco, Recife, Pernambuco, Brazil.
Acta Biotheoretica
|May 27, 2021
Summary
Ion channel gating, previously thought random, exhibits history-dependent "long memory." This review explores the origin and analysis of this deterministic behavior in ion channel kinetics.
Area of Science:
- Biophysics
- Molecular Biology
- Physiology
Background:
- Ion channels control ion flux across cell membranes, crucial for physiological processes.
- Their gating (opening/closing) was traditionally modeled as a random Markov process.
- Recent evidence suggests ion channel gating exhibits history-dependent long-range correlations.
Purpose of the Study:
- To review the phenomenon of long memory in ion channel kinetics.
- To discuss the potential origins and locations of this memory within ion channels.
- To explore mathematical methods for analyzing long-term correlations in channel gating.
Main Methods:
- Literature review of studies on ion channel gating mechanisms.
- Analysis of theoretical models describing deterministic kinetic processes.
- Discussion of mathematical techniques for detecting and quantifying long-range correlations.
Main Results:
- Ion channel gating is not purely random but displays deterministic, history-dependent behavior.
- The precise origin and structural basis of this 'long memory' remain subjects of ongoing research and debate.
- Various mathematical approaches exist to analyze these complex kinetic properties.
Conclusions:
- The classical random kinetic model for ion channels is insufficient to explain observed long-range correlations.
- Understanding the origin of long memory is key to a comprehensive model of ion channel function.
- Further research is needed to elucidate the mechanisms and implications of deterministic gating.
Keywords:
Detrended fluctuation analysisHurst coefficientIon channelLong-term correlationMemory effectModeling memoryMore Related Videos
Related Concept Videos
01:19The Role of Ion Channels in Neuronal Computation
3.4K
A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
3.4K
01:12Mechanically-gated Ion Channels
7.1K
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
7.1K
01:19Ion Channels
89.5K
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
89.5K
01:24Non-gated Ion Channels
7.6K
Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
7.6K
01:30Ligand-Gated Ion Channel Receptor: Gating Mechanism
3.1K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
3.1K
01:26Voltage-gated Ion Channels
9.3K
Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
9.3K