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Biochim Biophys Acta Gen Subj. 2017 Aug;1861(8):2112-2118. doi: 10.1016/j.bbagen.2017.04.010. Epub 2017 Apr 25.

Biosynthesis-inspired deracemizative production of d-luciferin by combining luciferase and thioesterase.

Author information

1
Department of Chemistry and Bioscience, Graduate School of Science and Engineering, Kagoshima University, Japan.
2
Department of Chemistry and Bioscience, Graduate School of Science and Engineering, Kagoshima University, Japan. Electronic address: kato@sci.kagoshima-u.ac.jp.
3
Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, Japan.
4
Research Institute for Physical Measurement, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Japan. Electronic address: niwa-k@aist.go.jp.

Abstract

Due to the strict enantioselectivity of firefly luciferase, only d-luciferin can be used as a substrate for bioluminescence reactions. Unfortunately, luciferin racemizes easily and accumulation of nonluminous l-luciferin has negative influences on the light emitting reaction. Thus, maintaining the enantiopurity of luciferin in the reaction mixture is one of the most important demands in bioluminescence applications using firefly luciferase. In fireflies, however, l-luciferin is the biosynthetic precursor of d-luciferin, which is produced from the L-form undergoing deracemization. This deracemization consists of three successive reactions: l-enantioselective thioesterification by luciferase, in situ epimerization, and hydrolysis by thioesterase. In this work, we introduce a deracemizative luminescence system inspired by the biosynthetic pathway of d-luciferin using a combination of firefly luciferase from Luciola cruciata (LUC-G) and fatty acyl-CoA thioesterase II from Escherichia coli (TESB). The enzymatic reaction property analysis indicated the importance of the concentration balance between LUC-G and TESB for efficient d-luciferin production and light emission. Using this deracemizative luminescence system, a highly sensitive quantitative analysis method for l-cysteine was constructed. This LUC-G-TESB combination system can improve bioanalysis applications using the firefly bioluminescence reaction by efficient deracemization of D-luciferin.

KEYWORDS:

Acyl-CoA thioesterase, EC 3.1.2.20; Bioluminescence; Biosynthesis; Deracemization; Firefly; Luciferase, EC 1.13.12.7; Luciferin; Thioesterase; α-Methyl-acyl-CoA-racemase, EC 5.1.99.4

PMID:
28454735
DOI:
10.1016/j.bbagen.2017.04.010
[Indexed for MEDLINE]

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