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Related Concept Videos

Detergent Purification of Membrane Proteins01:18

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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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Related Experiment Video

Updated: Aug 12, 2025

Preparation, Purification, and Use of Fatty Acid-containing Liposomes
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Preparation, Purification, and Use of Fatty Acid-containing Liposomes

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Evaluating methods to create protein functionalized catanionic vesicles.

Paul Zayka1, Brendan Parr1, Hannah Robichaud1

  • 1Chemistry Department, Saint Anselm College, Manchester, NH 03102, USA. mhurley@anselm.edu.

Soft Matter
|February 1, 2023
PubMed
Summary
This summary is machine-generated.

Catanionic surfactant vesicles (SVs) were functionalized with acid phosphatase, demonstrating potential for drug delivery and vaccine platforms. Protein attachment was confirmed, with 15% activity retained, highlighting SVs

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Surface Chemistry

Background:

  • Catanionic surfactant vesicles (SVs) show promise for biomedical applications like drug delivery and vaccine development.
  • Protein functionalization of SV surfaces is crucial for realizing these applications.

Purpose of the Study:

  • To investigate methods for attaching proteins to the surface of sodium dodecylbenzenesulfonate (SDBS) and cetyltrimethylammonium tosylate (CTAT) vesicles.
  • To assess the functionality and characteristics of protein-conjugated SVs.

Main Methods:

  • Wheat germ acid phosphatase was used as a model protein for conjugation to SVs enriched with a Triton X-100 derivative.
  • Enzymatic activity was measured using an acid phosphatase assay.
  • Dynamic Light Scattering (DLS) and zeta potential measurements were employed to characterize vesicle size and surface charge.

Main Results:

  • Acid phosphatase was successfully conjugated to the vesicle surface.
  • Approximately 15% of the attached acid phosphatase retained enzymatic activity, though the assay was affected by vesicle presence.
  • DLS and zeta potential measurements showed functionalized vesicles had an average diameter of 175 ± 85 nm and zeta potential of -61 ± 5 mV.

Conclusions:

  • Protein functionalization of SVs is a viable strategy for developing advanced biomedical technologies.
  • Antibodies or spike proteins could be utilized for targeted drug delivery or novel vaccine platforms, respectively.