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Investigation of Multivalent Interactions Between Conjugate of Quantum Dots With c-Myc Peptide Tag and the anti-c-Myc Antibody by Capillary Electrophoresis With Fluorescence Detection

Investigation of Multivalent Interactions Between Conjugate of Quantum Dots With c-Myc Peptide Tag and the anti-c-Myc Antibody by Capillary Electrophoresis With Fluorescence Detection

Jianhao Wang, Li Yang, Li Liu, Hao Wu, Jianpeng Wang, Pengju Jiang, Xiyuan Jiang, Lin Qiu

J Sep Sci. 2016 Dec;39(23):4653-4659.

PMID: 27696714

Abstract:

Herein, we report an assay for detecting the binding of a multivalent peptide and antibody within a capillary with the use of fluorescence coupled capillary electrophoresis. Quantum dots and a c-Myc tag containing peptide EQKLISEEDLG4 H6 were injected sequentially and formed a multivalent quantum dot-EQKLISEEDLG4 H6 assembly within the capillary. The efficiency of the quantum dot-peptide self-assembly was affected by the peptide/quantum dot molar ratio, sampling time, and interval time. Finally, the binding of the monoclonal anti-c-Myc antibody and the multivalent quantum dot-EQKLISEEDLG4 H6 ligand was studied using an in-capillary assay. The microscopic dissociation constant for the self-assembly of monoclonal anti-c-Myc antibody and quantum dot-EQKLISEEDLG4 H6 was determined to be 14.1 μM with a stoichiometry of the peptide-antibody complex of 1.7 determined after fitting this to the Hill equation. This method can be further extended to detect a wide range of biomolecule-biomolecule binding interactions.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
IAR42411497	c-Myc Peptide			Price

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