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Related Concept Videos

Introduction to Membrane Proteins01:16

Introduction to Membrane Proteins

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The cell membrane, or plasma membrane, is an ever-changing landscape. It is described as a fluid mosaic where various macromolecules are embedded in the phospholipid bilayer. Among the macromolecules are proteins. The protein content varies across cell types. For example, mitochondrial inner membranes contain ~76% protein content, while myelin contains ~18% protein content. Individual cells contain many types of membrane proteins—red blood cells contain over 50—and different cell...
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Protein Diffusion in the Membrane01:24

Protein Diffusion in the Membrane

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Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
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Fluid Mosaic Model01:19

Fluid Mosaic Model

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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...
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Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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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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Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

2.1K
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
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Single-pass Transmembrane Proteins01:25

Single-pass Transmembrane Proteins

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Integral membrane proteins are tightly associated with the cell membrane and play a crucial role in cell communication, signaling, adhesion, and transport of the molecules. Some integral membrane proteins are present only in the membrane monolayer. For example, the enzyme fatty acid amide hydrolase is present in the cytoplasmic side of the membrane monolayer. In contrast, another type of integral membrane protein, also known as a transmembrane protein, spans across the membrane. Transmembrane...
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Updated: Jul 12, 2025

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
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Exploring the World of Membrane Proteins: Techniques and Methods for Understanding Structure, Function, and Dynamics.

Imad Boulos1, Joy Jabbour1, Serena Khoury1

  • 1Faculty of Medicine and Medical Sciences, University of Balamand, Tripoli P.O. Box 100, Lebanon.

Molecules (Basel, Switzerland)
|October 28, 2023
PubMed
Summary

This review explores computational and experimental methods for studying eukaryotic membrane proteins. Understanding their structure and function is crucial for cell biology, with artificial intelligence offering new insights.

Keywords:
X-ray crystallographyartificial intelligenceatomic force microscopycomputational techniquescryo-electron microscopyelectrophoresismembrane proteinsnuclear magnetic resonance

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Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
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Crystallizing Membrane Proteins for Structure Determination using Lipidic Mesophases
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Area of Science:

  • Molecular Biology
  • Biophysics
  • Cell Biology

Background:

  • Membrane proteins are vital in eukaryotic cells, categorized as intrinsic or extrinsic.
  • Integral membrane proteins are stabilized by hydrophobic interactions within the lipid bilayer.
  • A significant portion of the human genome encodes proteins essential for cellular functions.

Purpose of the Study:

  • To review diverse computational and experimental methods for membrane protein research.
  • To highlight the importance of understanding membrane protein structure-function relationships.
  • To emphasize the role of artificial intelligence in advancing membrane protein studies.

Main Methods:

  • Electrophoresis
  • X-ray crystallography
  • Cryogenic electron microscopy (cryo-EM)
  • Nuclear magnetic resonance (NMR) spectroscopy
  • Biophysical techniques
  • Computational modeling
  • Artificial intelligence (AI)

Main Results:

  • These methods enhance understanding of membrane protein structure and function.
  • The integration of AI with experimental data promises deeper biological insights.
  • Multidisciplinary approaches are essential for unraveling membrane protein complexity.

Conclusions:

  • Understanding membrane protein functions is critical for eukaryotic cell biology.
  • A comprehensive review of current methodologies is presented.
  • Future advancements rely on integrating diverse experimental and computational strategies, including AI.