MutS protein-based fiber optic particle plasmon resonance biosensor for detecting single nucleotide polymorphisms

A new biosensing method is presented to detect gene mutation by integrating the MutS protein from bacteria with a fiber optic particle plasmon resonance (FOPPR) sensing system. In this method, the MutS protein is conjugated with gold nanoparticles (AuNPs) deposited on an optical fiber core surface....

Full description

Saved in:
Bibliographic Details
Published in:Analytical and bioanalytical chemistry 2021-05, Vol.413 (12), p.3329-3337
Main Authors: Ngo, Loan Thi, Wang, Wei-Kai, Tseng, Yen-Ta, Chang, Ting-Chou, Kuo, Pao-Lin, Chau, Lai-Kwan, Huang, Tze-Ta
Format: Article
Language:English
Subjects:
Analysis
Analytical Chemistry
Biochemistry
Biological properties
Biological samples
Biosensors
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Deoxyribonucleic acid
DNA
Fiber optics
Food Science
Gold
Identification and classification
Kinetics
Laboratory Medicine
Light intensity
Luminous intensity
Methods
Microfluidics
Monitoring/Environmental Analysis
Mutation
MutS protein
Nanoparticles
Nucleotides
Optical fibers
Point mutation
Proteins
Research Paper
Resonance
Single nucleotide polymorphisms
Single-nucleotide polymorphism
Surface plasmon resonance sensors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A new biosensing method is presented to detect gene mutation by integrating the MutS protein from bacteria with a fiber optic particle plasmon resonance (FOPPR) sensing system. In this method, the MutS protein is conjugated with gold nanoparticles (AuNPs) deposited on an optical fiber core surface. The target double-stranded DNA containing an A and C mismatched base pair in a sample can be captured by the MutS protein, causing increased absorption of green light launching into the fiber and hence a decrease in transmitted light intensity through the fiber. As the signal change is enhanced through consecutive total internal reflections along the fiber, the limit of detection for an AC mismatch heteroduplex DNA can be as low as 0.49 nM. Because a microfluidic chip is used to contain the optical fiber, the narrow channel width allows an analysis time as short as 15 min. Furthermore, the label-free and real-time nature of the FOPPR sensing system enables determination of binding affinity and kinetics between MutS and single-base mismatched DNA. The method has been validated using a heterozygous PCR sample from a patient to determine the allelic fraction. The obtained allelic fraction of 0.474 reasonably agrees with the expected allelic fraction of 0.5. Therefore, the MutS-functionalized FOPPR sensor may potentially provide a convenient quantitative tool to detect single nucleotide polymorphisms in biological samples with a short analysis time at the point-of-care sites. Graphical abstract
ISSN:1618-2642
1618-2650
DOI:10.1007/s00216-021-03271-1