Applied Biological Chemistry (Dec 2023)

Heterologous expression in E. coli and functional characterization of the tomato CPR enzymes

  • Won Choi,
  • Seo Young Park,
  • Hyun Min Kim,
  • Thanh Dat Mai,
  • Ju Hui Do,
  • Hye Min Jang,
  • Hyeon Bae Hwang,
  • Eun Gyeong Song,
  • Jae Sung Shim,
  • Young Hee Joung

DOI
https://doi.org/10.1186/s13765-023-00850-x
Journal volume & issue
Vol. 66, no. 1
pp. 1 – 10

Abstract

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Abstract NADPH-cytochrome P450 reductase (CPR) is a key enzyme transferring electrons to cytochrome P450. In tomatoes (Solanum lycopersicum), two CPR genes, SlCPR1 and SlCPR2, were identified. In all the tested tomato tissues, SlCPR2 showed higher expression levels than SlCPR1. SlCPR2 expression increased significantly with jasmonic acid treatment. No significant changes were observed with salicylic acid or drought stress treatment. The cDNA of SlCPRs were expressed in Escherichia coli without any amino acid modification. And the heterologously expressed SlCPR enzymes were reacted with several protein and chemical substrates. SlCPR2 was more active than SlCPR1. Both SlCPR1 and SlCPR2 exhibited strong activity across a pH range of 6.0 to 9.0, with peak activity at pH 8.0. The study opens possibilities for CPR control, biocatalyst development, and exploring oxidase enzyme functions.

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