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Mechanisms of Membrane Domain Formation

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.
Another mechanism for membrane domain formation involves membrane proteins interacting with...

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Related Experiment Video

Updated: Sep 6, 2025

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Published on: December 15, 2015

Multicomponent Copolymer Planar Membranes with Nanoscale Domain Separation.

Maryame Bina¹, Agata Krywko-Cendrowska¹, Davy Daubian¹

¹Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, Basel 4058, Switzerland.

|June 30, 2022

Summary

This summary is machine-generated.

Synthetic planar membranes with nanoscale domains were created using block copolymers. This overcomes limitations of lipid-based membranes, enabling advanced artificial cell technologies and biomimetic surface development.

Keywords:

Self-assembled membranes amphiphilic block copolymers biomimicry domain formation phase separation surface functionalization

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Last Updated: Sep 6, 2025

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Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film

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Published on: July 10, 2016

Area of Science:

Materials Science
Polymer Chemistry
Biotechnology

Background:

Domain separation is vital for cellular functions and artificial cell technologies.
Current lipid-based membranes face stability issues, limiting applications.
Block copolymers offer a synthetic alternative for stable, phase-separating membranes.

Purpose of the Study:

To develop fully synthetic planar membranes that undergo nanoscale phase separation.
To explore the use of amphiphilic diblock copolymers for creating textured surfaces.
To overcome the stability limitations of lipid-based membranes in artificial cell applications.

Main Methods:

Fabrication of mono- and bilayer membranes using two specific amphiphilic diblock copolymers (PEO45-b-PEHOx20 and PMOXA10-b-PDMS25).
Mixing copolymers at various concentrations to induce phase separation.
Utilizing the molar ratio of copolymers and solid support characteristics to control nanoscale domain formation.

Main Results:

Achieved nanoscale phase separation in synthetic planar membranes, forming distinct domains within a continuous phase.
Demonstrated that copolymer molar ratios and solid support type are key parameters for inducing and controlling phase separation.
Successfully tailored domain size and surface morphology through adjustments in copolymer ratios and transfer conditions.

Conclusions:

Introduced a novel approach for creating synthetic planar membranes with controlled nanoscale phase separation.
The developed membranes offer enhanced stability compared to lipid-based systems.
This work paves the way for advanced biomimetic planar membranes with tunable nanopatterned surfaces for technological applications.