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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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Membrane Proteins01:30

Membrane Proteins

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Plasma membranes have integral transmembrane proteins involved in facilitated transport. These proteins are collectively referred to as transport proteins, and they function as either channels for the material or as carriers themselves. Channel proteins have hydrophilic domains exposed to the intracellular and extracellular fluids and a hydrophilic channel through their core that provides a hydrated opening for solutes to pass through the membrane layers. Passage through the channel allows...
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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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Detergent Purification of Membrane Proteins01:18

Detergent Purification of Membrane Proteins

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Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
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GPI Anchoring of Proteins in the ER Membrane01:29

GPI Anchoring of Proteins in the ER Membrane

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GPI-anchoring is a post-translational, reversible protein modification that is ubiquitous in eukaryotes. Such proteins are primarily present on the exoplasmic leaflet of the plasma membrane.
GPI-anchor structure
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Energy Basics02:27

Energy Basics

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Chemical reactions, such as those that occur when you light a match, involve changes in energy as well as matter.
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Reconstitution of Membrane-Tethered Minimal Actin Cortices on Supported Lipid Bilayers
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Membrane-tethered proteins for basic research, imaging, and therapy.

Tian-Lu Cheng1, Steve Roffler

  • 1Faculty of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, Taiwan.

Medicinal Research Reviews
|May 16, 2008
PubMed
Summary
This summary is machine-generated.

Researchers are anchoring proteins to mammalian cell surfaces to create novel therapeutics and diagnostic tools. Optimizing chimeric proteins with specific domains and glycosylation enhances their surface expression and function.

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Cell Biology

Background:

  • Proteins like antibodies and enzymes can be engineered for cell surface display.
  • Cell surface anchoring offers new therapeutic and diagnostic applications.
  • Chimeric proteins can be targeted to mammalian cell surfaces.

Purpose of the Study:

  • To review advancements in designing vectors for cell surface protein display.
  • To highlight the potential of surface-anchored chimeric proteins in various applications.
  • To discuss strategies for enhancing protein expression on cell surfaces.

Main Methods:

  • Designing vectors for chimeric protein targeting and retention.
  • Comparing chimeric protein constructs to identify optimal design features.
  • Investigating the role of cytoplasmic domains and glycosylation in surface expression.

Main Results:

  • Specific cytoplasmic domains and cell-surface glycosylation significantly enhance chimeric protein expression.
  • Surface-anchored proteins show promise in targeted drug delivery and cancer therapy.
  • Applications include in vivo imaging, high-throughput screening, and immune modulation.

Conclusions:

  • Surface-anchored chimeric proteins offer a versatile platform for novel therapeutics and diagnostics.
  • Optimizing protein design is crucial for successful cell surface display and function.
  • This technology holds significant potential for advancing medicine and biotechnology.