2. Academic Validation
  3. Enzymatic properties and immobilization of a thermostable prenyltransferase from Aspergillus fumigatiaffinis for the production of prenylated naringenin

Enzymatic properties and immobilization of a thermostable prenyltransferase from Aspergillus fumigatiaffinis for the production of prenylated naringenin

  • Bioorg Chem. 2024 Feb 8:145:107183. doi: 10.1016/j.bioorg.2024.107183.
Wenbo Li 1,  Xin Yan 1,  Wenli Xia 1,  Linguo Zhao 2,  Jianjun Pei 3
Affiliations

Affiliations

  • 1 Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Nanjing 210037, China.
  • 2 Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Nanjing 210037, China. Electronic address: njfu2302@163.com.
  • 3 Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Nanjing 210037, China. Electronic address: peijj2000@sina.com.cn.
PMID: 38340474 DOI: 10.1016/j.bioorg.2024.107183
Abstract

Prenyltransferases catalyze the synthesis of prenylated Flavonoids, providing these with greater lipid solubility, biological activity, and availability. In this study, a thermostable prenyltransferase (AfPT) from Aspergillus fumigatiaffinis was cloned and expressed in Escherichia coli. By optimizing induction conditions, the expression level of AfPT reached 39.3 mU/mL, which was approximately 200 % of that before optimization. Additionally, we determined the enzymatic properties of AfPT. Subsequently, AfPT was immobilized on carboxymethyl cellulose magnetic nanoparticles (CMN) at a maximum load of 0.6 mg/mg. Optimal activity of CMN-AfPT was achieved at pH 8.0 and 55 °C. Thermostability assays showed that the residual activity of CMN-AfPT was greater than 50 % after incubation at 55 °C for 4 h. Km and Vmax of CMN-AfPT for naringenin were 0.082 mM and 5.57 nmol/min/mg, respectively. The Kcat/Km ratio of CMN-AfPT was higher than that of AfPT. Residual prenyltransferase activity of CMN-AfPT remained higher than 70 % even after 30 days of storage. Further, CMN-AfPT retained 68 % of its original activity after 10 cycles of reuse. Compared with free AfPT, CMN-AfPT showed higher catalytic efficiency, thermostability, metal ion tolerance, substrate affinity, storage stability, and reusability. Our study presents a thermostable prenyltransferase and its immobilized form for the production of prenylated Flavonoids in vitro.

Keywords

CMN; Immobilization; In vitro transformation; Prenylated flavonoids; Prenyltransferase.

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