Membrane Ring Formation
Membrane Ring Formation - Related Videos
08:23
Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film
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Cited by 4 •
2016
We demonstrate a storable, transportable lipid bilayer formation system. A lipid bilayer membrane can be formed within 1 hr with over 80% success rate when a frozen membrane precursor is brought to ambient temperature. This system will reduce laborious processes and expertise associated with ion channels.
06:58
Quantification of Membrane Ruffle Formation Using Scanning Electron Microscopy
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2025
This video demonstrates sample preparation, fixation, and imaging of a macrophage cell that displays membrane ruffles using scanning electron microscopy, SEM. Detailed information about membrane morphology and organization is crucial for understanding the physiological condition of the cells.
00:59
Mechanisms of Membrane Domain Formation
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2023
Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains. Another mechanism for membrane domain formation involves membrane proteins interacting with cytoskeletal...
08:05
Visualizing Membrane Ruffle Formation using Scanning Electron Microscopy
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Cited by 3 •
2021
Macropinocytosis is a highly conserved endocytic process initiated by the formation of F-actin-rich sheet-like membrane projections, also known as membrane ruffles. Increased rate of macropinocytotic solute internalization has been implicated in various pathological conditions. This protocol presents a method to quantify membrane ruffle formation in vitro using scanning electron microscopy.
20:21
Use of a Robot for High-throughput Crystallization of Membrane Proteins in Lipidic Mesophases
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Cited by 47 •
2012
Herein is described a robotic approach to high-throughput crystallization of membrane proteins in lipidic mesophases for use in structure determination using macromolecular X-ray crystallography. Three robots capable of handling the viscous and sticky protein-laden mesophase integral to the method are introduced.
FAQs
Complement components assemble in an ordered sequence on a susceptible pathogen or target-cell membrane. This progression concentrates the relevant proteins into a circular complex rather than a random surface deposit, allowing the structure to become a transmembrane pore. The sequence is therefore important because it links molecular recruitment with the final loss of membrane barrier function.
A completed pore disrupts the membrane’s barrier properties by creating a passage through the lipid bilayer. That structural change can compromise the target cell and contribute to lysis, although the relationship between pore architecture and lysis remains an important subject of investigation. Examining both features helps distinguish assembly from its damaging outcome.
Pathogens may avoid or limit the consequences of complement attack by resisting the assembly process or reducing the damage caused by the resulting pore. Studying these resistance mechanisms clarifies why some microbial membranes remain intact despite innate immune activity. It also connects membrane-level defenses with broader differences in infection outcomes.
Imaging approaches can show where complement complexes assemble and whether they organize into ring-shaped structures in the membrane. They can also provide evidence of membrane remodeling associated with complex formation. These observations help investigators relate the visible organization of the complex to changes in membrane integrity and to the eventual extent of target-cell damage.
Biochemical approaches complement imaging by examining the components that participate in complex assembly and the sequence in which they accumulate. Used alongside structural observations, they can help connect component recruitment with pore formation and membrane disruption. This combined strategy is useful for separating the molecular steps of assembly from the later consequences for the target cell.
The process provides a framework for studying how innate immunity damages bacterial membranes, how pathogens withstand complement-mediated attack, and why membrane disruption produces different infection outcomes. Researchers can compare complex structure, membrane remodeling, and cell lysis to determine how the organization of a pore influences the effectiveness of host defense.