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Ultrasensitive Detection of Bovine Serum Albumin on DNA Modified Protein Microcapsules-based Electrodes

Authors :
Dhananjayan Nathiya
Jeyaraj Wilson
Karuppasamy Gurunathan
Gokana Mohana Rani
Chikkili Venkateswara Raju
Vishal Chaudhary
Source :
Journal of The Electrochemical Society. 170:057516
Publication Year :
2023
Publisher :
The Electrochemical Society, 2023.

Abstract

Bovine serum albumin (BSA) emerged as a potential bioprotein in the sensing field. Understanding the interactions of BSA with the analyte biomolecule has not been much reported. Herein, we report the functionally modified BSA (f-BSA) and its consecutive adsorption onto DNA for the ultrasensitive protein sensing. The DNA-modified f-BSA (DNA@f-BSA) composite was further characterized by using scanning electron microscopy, X-ray diffraction and Fourier transform-infrared spectroscopy. Obtained results demonstrated excellent composite formulation due to electrostatic interaction/binding intercalation and provided promising scaffold for protein biosensor. The as-prepared DNA modified f-BSA (DNA@f-BSA) based biocomposite can be used as a selective probe for the detection of BSA by recording square wave voltammetry signals. The sensitivity of the hybrid biosensor significantly improved the BSA detection over a wide concentration range from 1 × 10−20 g ml−1 to 1 × 10−4 g ml−1 with a detection limit of 2.18 × 10−21 g ml−1. Thus, the results have revealed the promising biosensor interactions which pave the way for the sensitive protein detection.

Details

ISSN :
19457111 and 00134651
Volume :
170
Database :
OpenAIRE
Journal :
Journal of The Electrochemical Society
Accession number :
edsair.doi...........25037d02f016ed2de67d1d3d5ffd1e57