Related Experiment Video
Updated: Jul 12, 2025
Genetic and Biochemical Approaches for In Vivo and In Vitro Assessment of Protein Oligomerization: The Ryanodine Receptor Case Study
Published on: July 27, 2016
Streamlining the Detection of Human Thyroid Receptor Ligand Interactions with XL1-Blue Cell-Free Protein Synthesis
J Porter Hunt1, Tyler J Free1, Jackelyn Galiardi2
1Department of Chemical Engineering, Brigham Young University, Provo, UT 84602, USA.
Abstract:
Thyroid receptor signaling controls major physiological processes and disrupted signaling can cause severe disorders that negatively impact human life. Consequently, methods to detect thyroid receptor ligands are of great toxicologic and pharmacologic importance. Previously, we reported thyroid receptor ligand detection with cell-free protein synthesis of a chimeric fusion protein composed of the human thyroid receptor beta (hTRβ) receptor activator and a β-lactamase reporter. Here, we report a 60% reduction in sensing cost by reengineering the chimeric fusion protein biosensor to include a reporter system composed of either the full-length beta galactosidase (β-gal), the alpha fragment of β-gal (β-gal-α), or a split alpha fragment of the β-gal (split β-gal-α). These biosensor constructs are deployed using E. coli XL1-Blue cell extract to (1) avoid the β-gal background activity abundant in BL21 cell extract and (2) facilitate β-gal complementation reporter activity to detect human thyroid receptor ligands. These results constitute a promising platform for high throughput screening and potentially the portable detection of human thyroid receptor ligands.
Insights
Researchers developed a cheaper, faster biosensor for detecting thyroid receptor ligands. This new system uses engineered beta-galactosidase reporters for improved accuracy and potential for portable screening of thyroid disorders.
Area of Science:
- Biochemistry
- Molecular Biology
- Toxicology
Background:
- Thyroid receptor signaling is crucial for physiological processes.
- Disrupted signaling leads to severe human disorders.
- Detecting thyroid receptor ligands is vital for toxicology and pharmacology.
Purpose of the Study:
- To reduce the cost of detecting thyroid receptor ligands.
- To develop an improved biosensor for human thyroid receptor ligands.
- To create a platform for high-throughput and portable ligand detection.
Main Methods:
- Reengineered a chimeric fusion protein biosensor with beta-galactosidase (β-gal) reporter systems.
- Utilized E. coli XL1-Blue cell extract to avoid background activity and facilitate β-gal complementation.
- Tested full-length β-gal, β-gal-α, and split β-gal-α reporter systems.
Main Results:
- Achieved a 60% reduction in sensing cost.
- Successfully detected human thyroid receptor ligands using the engineered biosensors.
- Demonstrated the utility of E. coli XL1-Blue extract for enhanced reporter activity.
Conclusions:
- The reengineered biosensor offers a cost-effective method for thyroid receptor ligand detection.
- This platform shows promise for high-throughput screening of potential drugs and environmental toxins.
- The system could be adapted for portable detection of thyroid receptor ligands.
More Related Videos
06:01Extracellular Protein Microarray Technology for High Throughput Detection of Low Affinity Receptor-Ligand Interactions
Published on: January 7, 2019
08:27Detection of Human Leukocyte Antigen Biomarkers in Breast Cancer Utilizing Label-free Biosensor Technology
Published on: March 24, 2015
