JOURNAL OF LIGHT INDUSTRY

CN 41-1437/TS  ISSN 2096-1553

Volume 40 Issue 4
August 2025
Article Contents
HAN Li, DONG Ziqiang, WANG Lijiao, et al. Structural prediction,cloning expression,and functional verification of NtASAT2 from Nicotiana tabacum L.[J]. Journal of Light Industry, 2025, 40(4): 69-76. doi: 10.12187/2025.04.008
Citation: HAN Li, DONG Ziqiang, WANG Lijiao, et al. Structural prediction,cloning expression,and functional verification of NtASAT2 from Nicotiana tabacum L.[J]. Journal of Light Industry, 2025, 40(4): 69-76. doi: 10.12187/2025.04.008 shu

Structural prediction,cloning expression,and functional verification of NtASAT2 from Nicotiana tabacum L.

  • Received Date: 2024-05-10
    Accepted Date: 2024-05-27
  • To obtain active acylsugar acyltransferase NtASAT2 from Nicotiana tabacum L., bioinformatic methods were employed to analyze and predict its sequence and structure. The NtASAT2 gene was cloned, prokaryotically expressed in Escherichia coli BL21(DE3), and subsequently purified. The function of the recombinant protein was characterized through enzymatic catalysis. The results showed that in the secondary structure of NtASAT2, α-helices and random coils accounted for 39.04% and 41.13% of the total structure, respectively. The amino acid sequence of NtASAT2 was highly similar to that of Nicotiana glutinosa NacASAT2. The solubility of NtASAT2 in the recombinant protein expressed in E.coli BL21(DE3) was low, and NtASAT2 exhibited weak binding affinity for the nickel column. Consequently, only a small amount of the target protein was successfully purified. In enzymatic reaction systems supplemented with substrates, NtASAT2 exhibited enzymatic activity and catalyzed the production of sucrose diesters. These findings provided a theoretical basis for the application of NtASAT2 in the enzymatic catalysis of sucrose ester synthesis.
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