Lipid Biophysics
Lipid Biophysics - Related Videos
11:43
Concentric Gel System to Study the Biophysical Role of Matrix Microenvironment on 3D Cell Migration
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Cited by 7 •
2015
The mechanical properties and microstructure of the extracellular matrix strongly affect 3D migration of cells. An in vitro method to study the spatiotemporal cell migration behavior in biophysically variable environments, at both population and individual cell levels, is described.
10:52
Gramicidin-based Fluorescence Assay; for Determining Small Molecules Potential for Modifying Lipid Bilayer Properties
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Cited by 34 •
2010
We introduce a fast fluorescence-based assay that monitors the rate of fluorescence quenching as a measure of gramicidin channel activity. The gramicidin channels are used as molecular force transducers to monitor changes in lipid bilayer properties as sensed by bilayer spanning proteins.
15:53
Isolation and Biophysical Study of Fruit Cuticles
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Cited by 16 •
2012
Aerial plant organs are protected by the cuticle, a supramolecular biopolyester-wax assembly. We present protocols to monitor selective removal of epi- and intracuticular waxes from tomato fruit cuticles on molecular and micro scales by solid-state NMR and atomic force microscopy, respectively, and to assess the cross-linking capacity of engineered cuticular biopolyesters.
10:34
Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
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Cited by 3 •
2017
We present a protocol to functionalize glass with nanometric protein patches surrounded by a fluid lipid bilayer. These substrates are compatible with advanced optical microscopy and are expected to serve as platform for cell adhesion and migration studies.
03:38
Structure of Lipids
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2020
Lipids include a diverse group of compounds that are largely nonpolar in nature. This is because they are hydrocarbons that include mostly nonpolar carbon-carbon or carbon-hydrogen bonds. Non-polar molecules are hydrophobic (“water fearing”), or insoluble in water. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of fats. Lipids also provide insulation from the environment for plants and animals. For example, they help keep aquatic birds and...
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Lipid composition links molecular structure to membrane performance. Headgroup chemistry influences interactions, while hydrocarbon-chain length and saturation affect bilayer fluidity and organization. Temperature further shifts these physical properties, which can alter permeability and the tendency of lipids to separate into distinct phases. Controlling these variables therefore helps tune membranes for biological or engineered systems.
Phase separation reveals how chemically different lipid populations organize within a membrane rather than behaving as a uniform layer. Because composition and molecular interactions govern this organization, separated phases can change membrane properties and create distinct physical environments. In bioengineering, examining phase behavior helps connect lipid formulation to the structure and function of membrane-mimetic materials.
Proteins can modify how lipids pack and interact, affecting membrane curvature, mechanics, and dynamics. These changes matter because membrane shape and mechanical behavior are connected to molecular composition and cellular function. Studying lipid-protein interactions therefore helps researchers explain how membranes adopt particular structures and supports the design of engineered interfaces that reproduce selected membrane properties.
Design begins by relating lipid molecular features to the desired physical behavior of the assembly. Researchers can adjust headgroup chemistry, chain length, saturation, temperature, and lipid-protein interactions to influence structure, fluidity, permeability, phase organization, and curvature. This composition-to-property framework supports the engineering of liposomes and lipid nanoparticles for drug delivery and related biomedical applications.
Quantitative analysis connects measurable membrane mechanics and dynamics with the molecular composition that produces them. Rather than considering structure alone, researchers can evaluate how changes in lipid organization influence physical behavior and relate those observations to cellular function. The resulting information can guide refinement of synthetic biological systems and improve the design of membrane-based biomaterials.
In bioengineering, lipid biophysics informs several material and interface designs, including liposomes, lipid nanoparticles, membrane-mimetic interfaces, and biomaterials. These systems support applications in drug delivery, biosensing, and tissue engineering. The field is useful because it provides a way to connect lipid composition and molecular interactions with properties such as permeability, fluidity, mechanics, and curvature.