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Related Concept Videos

Mechanisms of Membrane-bending01:15

Mechanisms of Membrane-bending

The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
Fluid Mosaic Model01:19

Fluid Mosaic Model

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...
Mechanical Protein Functions01:58

Mechanical Protein Functions

Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force. 
Membrane Fluidity01:23

Membrane Fluidity

Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.Fatty acids tails of phospholipids can be either saturated or...
Membrane Fluidity01:26

Membrane Fluidity

Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is a relatively...

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Updated: Jul 17, 2026

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions
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Published on: May 27, 2021

Multi-body Fluctuation-Induced Forces Between Membrane Proteins: Insights from Mesoscale Simulations.

Adrià Bravo Vidal1, Weria Pezeshkian1

  • 1Niels Bohr International Academy, Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, 2100 Copenhagen, Denmark.

Biophysical Journal
|July 16, 2026
PubMed
Summary

Membrane proteins organize through indirect interactions, driven by the membrane’s shape fluctuations. Suppressing these fluctuations effectively attracts proteins, influencing cellular processes and nanoparticle design.

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Last Updated: Jul 17, 2026

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions
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Published on: May 27, 2021

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Published on: September 1, 2023

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08:10

Molecular Spring Constant Analysis by Biomembrane Force Probe Spectroscopy

Published on: November 20, 2021

Area of Science:

  • Biophysics
  • Cell Biology
  • Computational Biology

Background:

  • Protein organization is crucial for cellular functions like signal transduction and adhesion.
  • While direct protein binding drives clustering, indirect membrane-mediated forces are also significant.
  • Thermal shape fluctuations of membranes can induce protein clustering without direct binding.

Purpose of the Study:

  • To investigate the role of fluctuation-induced interactions in the lateral organization of membrane proteins.
  • To understand how membrane properties and protein characteristics influence protein clustering.
  • To explore the implications for membrane shape remodeling and nanoparticle design.

Main Methods:

  • Mesoscale simulations using dynamically triangulated surfaces.
  • Parameterization based on local membrane rigidification and curvature induction.
  • Analysis across various protein concentrations, membrane tensions, and geometries (planar and spherical).

Main Results:

  • Local membrane rigidification by proteins drives non-random organization and segregation above a critical threshold.
  • This threshold is sensitive to the degree of rigidification induced by proteins.
  • Membrane tension has a minor effect on organization away from the threshold but is significant near it.
  • Stiffer proteins nucleate clustering of softer proteins in mixed systems.
  • Protein-induced curvature and fluctuation-mediated clustering can remodel membrane shape.

Conclusions:

  • Suppression of membrane-shape fluctuations by proteins generates effective attractive forces, driving protein reorganization.
  • These findings have broad implications for understanding cellular processes and designing membrane-associated nanoparticles.
  • The study provides a comprehensive characterization of fluctuation-induced interactions in membrane protein organization.