Method to Determine Protein Concentration in the Protein-Nanoparticle Conjugates Aqueous Solution Using Circular Dichroism Spectroscopy

Shanghao Li, Zhili Peng, Roger Leblanc

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

(Graph Presented). Considerable efforts have been made to synthesize and characterize protein-nanoparticle conjugates (protein-NPs) for their promising applications in bionanotechnology. However, protein concentration determination in the protein-NPs has so far not been reported. In this Letter, we present a simple and nondestructive approach to quantify the protein concentration in the protein-NPs aqueous solution using circular dichroism (CD) spectroscopy. Carbon dots (∼4 nm), gold nanoparticles (∼10 nm), and polyethylene glycol (PEG, molecular weight ∼3000) were either physically mixed or covalently conjugated (not in the case of gold nanoparticles) with proteins (human transferrin, human serum albumin, and ovalbumin). We were able to quantify the protein concentration in the protein-nanoparticle conjugates using a calibration curve from the CD spectra.

Original languageEnglish (US)
Pages (from-to)6455-6459
Number of pages5
JournalAnalytical Chemistry
Volume87
Issue number13
DOIs
StatePublished - Jul 7 2015

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Circular dichroism spectroscopy
Nanoparticles
Proteins
Gold
Ovalbumin
Dichroism
Transferrin
Serum Albumin
Polyethylene glycols
Carbon
Molecular weight
Calibration

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Method to Determine Protein Concentration in the Protein-Nanoparticle Conjugates Aqueous Solution Using Circular Dichroism Spectroscopy. / Li, Shanghao; Peng, Zhili; Leblanc, Roger.

In: Analytical Chemistry, Vol. 87, No. 13, 07.07.2015, p. 6455-6459.

Research output: Contribution to journalArticle

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