Electrostatically Controlled Quantum Dot Monofunctionalization for Interrogating the Dynamics of Protein Complexes in Living Cells

Autor(en): You, Changjiang 
Wilmes, Stephan
Richter, Christian P.
Beutel, Oliver
Lisse, Domenik
Piehler, Jacob 
Stichwörter: Biochemistry & Molecular Biology; FUNCTIONALIZATION; HISTIDINE-TAGGED PROTEINS; I INTERFERON RECEPTOR; LIVE CELLS; MICROSCOPY; NANOPARTICLES; ORGANIZATION; PLASMA-MEMBRANE; SIGNAL-TRANSDUCTION; SINGLE-MOLECULE TRACKING
Erscheinungsdatum: 2013
Herausgeber: AMER CHEMICAL SOC
Journal: ACS CHEMICAL BIOLOGY
Volumen: 8
Ausgabe: 2
Startseite: 320
Seitenende: 326
Zusammenfassung: 
Quantum dots (QD) are powerful labels for probing diffusion and interaction dynamics of proteins on the single molecule level in living cells. Protein cross-linking due to multifunctional QD strongly affects these properties. This becomes particularly critical when labeling interaction partners with QDs for interrogating the dynamics of complexes. We have here implemented a generic method for QD monofunctionalization based on electrostatic repulsion of a highly negatively charged peptide carrier. On the basis of this method, monobiotinylated QDs were prepared with high yield as confirmed by single molecule assays. These QDs were successfully employed for probing the assembly and diffusion dynamics of binary and ternary cytokine-receptor complexes on the surface of living cells by dual color single QD tracking. Thus, sequential and dynamic recruitment of the type I interferon receptor subunits by the ligand could be observed.
ISSN: 15548929
DOI: 10.1021/cb300543t

Show full item record

Page view(s)

3
Last Week
0
Last month
0
checked on Mar 2, 2024

Google ScholarTM

Check

Altmetric