Protein conducting channels-mechanisms, structures and applications
Francesco Bonardi1, Nico Nouwen, Ben L Feringa
1Zernike Institute for Advanced Materials, Nijenborgh 7, AG Groningen, The Netherlands.
Molecular Biosystems
|January 20, 2012
Summary
Bionanotechnology advances protein applications in devices. Researchers explore membrane protein channels for macromolecule transport, enabling sensory devices and controlled molecular release for advanced applications.
Area of Science:
- Bionanotechnology
- Biophysics
- Molecular Biology
Background:
- The application of proteins in devices is a key development in bionanotechnology.
- Proteins, particularly membrane channels, can be modified for controlled function.
- These channels facilitate macromolecule transport across lipid bilayers.
Purpose of the Study:
- To discuss the structure and function of three distinct channel proteins.
- To compare the mechanisms of macromolecule passage mediated by these proteins.
- To provide an overview of technological advancements in using these proteins in controllable devices.
Main Methods:
- Comparative analysis of channel protein structures and functions.
- Review of existing literature on protein modification and device integration.
- Exploration of different mechanisms for macromolecule transport.
Main Results:
- Identified three channel proteins with unique mechanisms for macromolecule transport.
- Detailed the structure-function relationships enabling controlled passage.
- Highlighted the potential of these proteins as sensory devices and molecular nanovalves.
Conclusions:
- Membrane protein channels offer versatile platforms for bionanotechnological applications.
- Technological advances enable the development of human-controllable devices using these proteins.
- Further research can optimize protein-based devices for detection and controlled release.
Related Concept Videos
01:12Mechanically-gated Ion Channels
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...
01:12Mechanically-gated Ion Channels
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...
01:26Voltage-gated Ion Channels
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 types of...
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 types of...
01:26Voltage-gated Ion Channels
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 types of...
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 types of...
01:24Non-gated Ion Channels
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.
01:24Non-gated Ion Channels
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.