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Published on: May 4, 2012
Bioorthogonal modular assembly of functionalized nanobodies: A universal SNAP-click strategy for developing multiplex
Cong Liu1, Chen Luo1, Yiyang Zhang1
1Military Medical Sciences Academy, Academy of Military Sciences, Tianjin, 300050, China; Inner Mongolia Key Laboratory for Molecular Regulation of the Cell, School of Life Sciences, Inner Mongolia University, Hohhot, 010051, China.
This study presents a novel bioorthogonal strategy for modifying nanobodies using SNAP-tag and click chemistry. This enhances their use in food safety and biomedical applications, offering improved sensitivity for aflatoxin detection.
Area of Science:
- Biotechnology
- Chemical Biology
- Food Science
Background:
- Nanobodies offer high specificity for molecular recognition.
- Existing methods for nanobody functionalization can be limited in scope and efficiency.
- Sensitive detection of contaminants like Aflatoxin B1 is crucial for food safety.
Purpose of the Study:
- To develop a versatile bioorthogonal modification strategy for nanobodies.
- To engineer novel immunoassay platforms for enhanced sensitivity and applicability.
- To improve the detection limits for Aflatoxin B1 in complex matrices.
Main Methods:
- Utilized SNAP-tag-mediated site-specific conjugation and click chemistry.
- Developed four Aflatoxin B1 immunoassay methods: BA-CLIA, one-step FLIA, Nb-RCA, and Nb-LFIA.
- Employed fusion proteins and functionalized moieties (azide-labeled benzylguanine, alkyne/DBCO derivatives).
Main Results:
- Achieved significantly improved sensitivity compared to traditional ELISA (LODs ranging from 0.0095 to 0.64 ng/mL).
- The Nb-RCA platform demonstrated a 27-fold increase in sensitivity.
- Validated analytical performance in oat and milk samples with high recovery rates.
Conclusions:
- The developed bioorthogonal strategy enables efficient and modular nanobody functionalization.
- This approach offers a practical solution for expanding nanobody applications in various fields.
- The engineered immunoassay platforms show great promise for sensitive food safety monitoring and biomedical uses.
