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Related Concept Videos

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Updated: Dec 26, 2025

Author Spotlight: Direct Synthesis of EM-Visible Gold Nanoparticles in Cells for Protein Localization Analysis with Well-Preserved Ultrastructure
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Protein Immobilization on Gold Nanoparticles: Quantitative Analysis.

Evan Decker1, Chunsheng Bai2, Lauren Nelless1

  • 1Centre for Biomedical Sciences, School of Biological Sciences, Royal Holloway University of London, Egham, Surrey, UK.

Methods in Molecular Biology (Clifton, N.J.)
|March 11, 2020
PubMed
Summary

This study presents a simple method for quantifying protein conjugation to gold nanoparticles (AuNPs). This approach aids in understanding how immobilizing proteins on AuNPs affects their structure and function.

Keywords:
Au nanoparticlesAuNPsCircular dichroismDynamic light scatteringGold nanoparticlesNanoDropProteinProtein AProtein conjugation

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Area of Science:

  • Biochemistry
  • Nanotechnology
  • Materials Science

Background:

  • Conjugating biologically relevant molecules to gold nanoparticles (AuNPs) is crucial for medical and biochemical applications.
  • Protein immobilization on AuNPs can alter protein structure and function, necessitating careful characterization.
  • Existing control methods for protein immobilization studies present challenges in achieving identical reaction conditions.

Purpose of the Study:

  • To develop a straightforward procedure for the quantitative analysis of protein conjugation to AuNPs.
  • To address the challenges in accurately quantifying protein conjugation and removing unconjugated proteins.
  • To provide a reliable method for assessing the impact of AuNP immobilization on protein structure and function.

Main Methods:

  • Utilized fluorescence and circular dichroism measurements to illustrate the principles of the developed procedure.
  • Focused on quantitative analysis of protein conjugation to AuNPs.
  • Emphasized the importance of comprehensive control samples and experimental design.

Main Results:

  • A simple and straightforward procedure for quantitative analysis of protein conjugation to AuNPs was successfully described.
  • The method facilitates accurate quantification of conjugated proteins and removal of unconjugated proteins.
  • Demonstrated the utility of the method using fluorescence and circular dichroism.

Conclusions:

  • The developed procedure offers a reliable approach for quantitative analysis of protein-AuNP conjugation.
  • This method can be adapted for various proteins and analytical techniques.
  • Accurate characterization of protein immobilization on AuNPs is essential for advancing their applications.