Jump to main content
Jump to site search

Issue 28, 2017
Previous Article Next Article

Silver nanoparticle plasmonic enhanced förster resonance energy transfer (FRET) imaging of protein-specific sialylation on the cell surface

Author affiliations

Abstract

A large amount of proteins are post-translationally modified with a sialic acid terminal oligosaccharide, and sialylation directly affects the function of glycoproteins and adjusts relevant biological processes. Herein, we developed a method for imaging analysis of protein-specific sialylation on the cell surface via silver nanoparticle (AgNPs) plasmonic enhanced Förster resonance energy transfer (FRET). In this strategy, the target monosaccharide was labelled with the FRET acceptor of Cy5 via bioorthogonal chemistry. In addition, aptamer linked AgNPs were combined with the Cy3 fluorophore by DNA hybridization as the FRET donor probe, which could be conjugated to the target glycoprotein based on specific aptamer-protein recognition. The Cy5 fluorescence signal was obtained under the Cy3 excitation wavelength via FRET. Moreover, the FRET fluorescence signal was obviously enhanced owing to the plasmonic effect of AgNPs at an appropriate distance to Cy3 on the cell surface. Hence, the protein-specific sialic acids were detected with high contrast. The results showed that the AgNP plasmonic enhanced FRET method was not only superior to the bare FRET method but also can be used to evaluate the expression of sialoglycoproteins in different cell types under pharmacological treatments. The AgNP plasmonic enhanced FRET method provides a valuable tool in the research of glycan metabolism biological processes, the active site of glycoproteins and drug screening.

Graphical abstract: Silver nanoparticle plasmonic enhanced förster resonance energy transfer (FRET) imaging of protein-specific sialylation on the cell surface

Back to tab navigation

Supplementary files

Article information


Submitted
03 Mar 2017
Accepted
12 Apr 2017
First published
09 May 2017

Nanoscale, 2017,9, 9841-9847
Article type
Paper

Silver nanoparticle plasmonic enhanced förster resonance energy transfer (FRET) imaging of protein-specific sialylation on the cell surface

T. Zhao, T. Li and Y. Liu, Nanoscale, 2017, 9, 9841
DOI: 10.1039/C7NR01562C

Social activity

Search articles by author

Spotlight

Advertisements