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Published on: January 26, 2024
A low-temperature digital microfluidic system used for protein-protein interaction detection
Jienan Shen1,2,3, Jiaqi Liao2, Huiying Liu4
1Center for Bionic Sensing and Intelligence, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, Guangdong, P. R. China. hui.yang@siat.ac.cn.
A novel low-temperature digital microfluidic (LTDMF) system accelerates protein-protein interaction (PPI) detection. This LTDMF-PPI-Box reduces detection time to 1.5 hours and enhances protein stability, aiding PPI network development.
Area of Science:
- Biochemistry
- Molecular Biology
- Biotechnology
Background:
- Protein-protein interactions (PPIs) are crucial for biological processes and disease development.
- Traditional PPI detection methods suffer from limitations like protein degradation, long assay times, complexity, poor automation, and high costs.
- Developing efficient and rapid PPI detection methods is essential for advancing PPI network construction.
Purpose of the Study:
- To develop a rapid, lossless, and efficient protein-protein interaction detection system.
- To overcome the limitations of traditional PPI detection methods.
- To accelerate the establishment of comprehensive protein-protein interaction networks.
Main Methods:
- Development of a low-temperature digital microfluidic (LTDMF) system-based PPI detection box (LTDMF-PPI-Box).
- Integration of a PMMA shell, LTDMF-PPI chip, and a temperature control system with a thermoelectric cooler (TEC).
- Programmatic control of droplet movement for automated sample handling and reduced reaction times.
Main Results:
- Reduced PPI detection time from tens of hours to 1.5 hours.
- Achieved up to 90% protein protection at an operating temperature of 4 °C.
- Demonstrated the system's feasibility using the RILP and Rab26 protein interaction, relevant to insulin secretion.
Conclusions:
- The LTDMF-PPI-Box offers a rapid, efficient, and protein-preserving method for PPI detection.
- The automated nature of LTDMF technology supports high-throughput screening of interacting proteins.
- This system is poised to significantly accelerate the construction and expansion of protein-protein interaction networks.
