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Updated: Jul 17, 2026
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In vivo Dual Substrate Bioluminescent Imaging
Published on: October 11, 2011
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Biochemical Analysis Leads to Improved Orthogonal Bioluminescent Tools
Sierra J Williams1, Jordan A Gewing-Mullins2, Whitney K Lieberman2
1Department of Chemistry, University of California, Irvine, 1120 Natural Science II, Irvine, CA 92697, USA.
Chembiochem : a European Journal of Chemical Biology
|January 2, 2023
Summary
Engineered bioluminescent probes, Cashew and Pecan luciferases, show improved selectivity and stability for enhanced cellular imaging. This work advances understanding of structure-function relationships for better bioluminescent tools.
Area of Science:
- Biochemistry
- Molecular Biology
- Biotechnology
Background:
- Engineered luciferase-luciferin pairs enable multiplexed cellular imaging.
- Understanding the structure-function relationship of bioluminescent probes is crucial for developing improved pairs.
Purpose of the Study:
- To biochemically assess and optimize the Cashew/d-luc and Pecan/4'-BrLuc bioluminescent pairs.
- To elucidate the origin of selectivity in engineered luciferases.
Main Methods:
- Site-directed mutagenesis of Cashew and Pecan luciferases.
- Biochemical assays to determine substrate selectivity and thermal stability.
- Rational design for protein engineering.
Main Results:
- Identified key residues in Cashew and Pecan luciferases responsible for selectivity and thermal stability.
- Rational addition of beneficial residues significantly enhanced enzyme stability.
- Improved Cashew and Pecan luciferases exhibit >100-fold selectivity for their substrates and high thermal stability.
Conclusions:
- Mechanistic insight is vital for improving bioluminescent probe performance.
- The enhanced Cashew and Pecan enzymes are suitable for multicomponent imaging applications.
- This study provides significantly improved bioluminescent tools for biological research.
