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Related Concept Videos

Asymmetric Lipid Bilayer01:35

Asymmetric Lipid Bilayer

Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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.
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Fluid Mosaic Model01:19

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Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich with the analogy of...
Fluid Mosaic Model01:34

Fluid Mosaic Model

The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.LipidsThe most...
Protein-protein Interfaces02:04

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
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The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
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The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the anterior...

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Biomembrane Fabrication by the Solvent-assisted Lipid Bilayer (SALB) Method
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Biomembrane Fabrication by the Solvent-assisted Lipid Bilayer (SALB) Method

Published on: December 1, 2015

Membrane-substrate interface: phospholipid bilayers at chemically and topographically structured surfaces.

Atul N Parikh1

  • 1Department of Applied Science, University of California-Davis, Davis, California 95616, USA. anparikh@ucdavis.edu

Biointerphases
|April 23, 2010
PubMed
Summary
This summary is machine-generated.

Lipid self-assembly on structured surfaces creates models for lipid bilayers. These platforms enable studies of membrane biophysics and the development of bioanalytical devices.

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Area of Science:

  • Biophysics
  • Materials Science
  • Surface Chemistry

Background:

  • Lipid bilayers are fundamental to cell membranes.
  • Understanding lipid behavior on surfaces is crucial for biomimetic applications.
  • Previous models often lack the complexity of natural membrane environments.

Purpose of the Study:

  • To explore lipid self-assembly on chemically and topographically structured surfaces.
  • To develop novel platforms for studying lipid bilayer properties.
  • To create models for investigating biophysical phenomena and designing bioanalytical devices.

Main Methods:

  • Utilizing surface-assisted fusion, rupture, and spreading of vesicles.
  • Employing hydration-induced spreading of lipids onto patterned surfaces.
  • Investigating photochemically patterned molecular monolayers and topologically patterned surfaces.

Main Results:

  • Chemically structured surfaces induce template-assembly of coexisting lipid phases.
  • A controllable transition region (moat) separates fluid bilayer and monolayer regions.
  • Topologically patterned surfaces allow for the design of complex 3D membrane topographies.

Conclusions:

  • Structured surfaces provide versatile platforms for creating biomimetic lipid structures.
  • These platforms facilitate fundamental biophysical studies and the development of bioanalytical devices.
  • Lipid self-assembly on structured surfaces offers new strategies for synthesizing functional membrane substructures.