Related Experiment Video
Updated: Mar 30, 2026
08:21
Real-time In Vivo Recording of Arabidopsis Calcium Signals During Insect Feeding Using a Fluorescent Biosensor
Published on: August 15, 2017
13.6K
Engineering PQQ-glucose dehydrogenase into an allosteric electrochemical Ca(2+) sensor
Zhong Guo1, Wayne A Johnston, Viktor Stein
1Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia. k.alexandrov@uq.edu.au.
Chemical Communications (Cambridge, England)
|November 4, 2015
Summary
Researchers engineered a novel electrochemical biosensor for rapid calcium (Ca2+) measurement in human fluids. This innovation repurposes point-of-care glucometers for clinical calcium monitoring, enhancing diagnostic capabilities.
Area of Science:
- Biotechnology
- Electrochemistry
- Biosensor Technology
Background:
- Electrochemical biosensors typically rely on naturally occurring enzymes.
- Developing selective biosensors for specific analytes remains a key challenge in diagnostics.
Purpose of the Study:
- To engineer a novel electrochemical biosensor for selective calcium (Ca2+) detection.
- To adapt existing point-of-care devices for new diagnostic applications.
Main Methods:
- Genetically modified the PQQ-glucose dehydrogenase enzyme by inserting a calmodulin domain.
- Integrated the engineered enzyme into an electrochemical sensing platform.
- Adapted a commercially available glucometer for Ca2+ measurement.
Main Results:
- The developed biosensor demonstrated high selectivity for Ca2+.
- Rapid and accurate measurement of Ca2+ concentrations in human biological fluids was achieved.
- A standard glucometer was successfully repurposed into a Ca2+ monitor.
Conclusions:
- Enzyme engineering offers a viable strategy for creating highly specific electrochemical biosensors.
- This approach facilitates the development of point-of-care diagnostic tools for various analytes.
- Compatibility with existing amperometric detectors promises rapid clinical translation.
