Purification of a protein-based α-glucosidase inhibitor from Aspergillus niger VTCC 031

Thanh Tuan Tran, Nhat Linh Nguyen, Thi Trung Nguyen, Thi Mai Anh Dao, Duy Nam Pham, Minh Duc Luu, Thi Tuyen Do
Author affiliations

Authors

  • Thanh Tuan Tran \(^1\) Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Nghia Do, Hanoi, Vietnam
  • Nhat Linh Nguyen \(^3\) Institute of Biology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Nghia Do, Hanoi, Vietnam https://orcid.org/0009-0002-7643-1694
  • Thi Trung Nguyen \(^1\) Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Nghia Do, Hanoi, Vietnam
  • Thi Mai Anh Dao \(^4\) Department of Biochemistry, Hanoi University of Pharmacy, 13-15 Le Thanh Tong, Phan Chu Trinh, Hanoi, Vietnam
  • Duy Nam Pham Vietnam-Russia tropical center, 63 Nguyen Van Huyen, Hanoi, Vietnam
  • Minh Duc Luu \(^3\) Institute of Biology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Nghia Do, Hanoi, Vietnam
  • Thi Tuyen Do \(^1\) Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Nghia Do, Hanoi, Vietnam
    \(^3\) Institute of Biology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Nghia Do, Hanoi, Vietnam
    https://orcid.org/0000-0002-8048-5794

DOI:

https://doi.org/10.15625/vjbt-22393

Keywords:

Aspergillus niger VTCC 031, α-glucosidase inhibitor, chromatography.

Abstract

Alpha-glucosidase inhibitors, such as acarbose, voglibose, and miglitol, constitute a prevalent class of pharmaceuticals employed in the clinical management of diabetes. These inhibitors originate mostly from microorganisms, including Aspergillus sp., Bacillus sp., and Actinoplanes sp., representing a promising natural resource for identifying α-glucosidase inhibitors (AGIs) that offer enhanced therapeutic efficacy with reduced adverse effects. Aspergillus sp. is a fungus that has a rich array of secondary metabolites and produces several AGIs. In this work, the A. niger VTCC 031 demonstrated the capacity to manufacture compounds with significant α-glucosidase inhibitory activity, achieving a rate of 67.24%. The aqueous phase, obtained after ethyl acetate extraction, was purified using a Sephadex G100 column followed by a 30 kDa cut-off column, resulting in the purification of the α-glucosidase inhibitor characterized by low molecular weight protein properties. The SDS-PAGE chromatogram indicates that the active ingredient had a molecular weight of 14 kDa, with α-glucosidase inhibitory activity of 80.2% and a recovery efficiency of 0.02%. This study provides the scientific foundation for ongoing research into optimal conditions for the extraction and purification of the α-glucosidase inhibitor derived from the A. niger strain, a metabolically active fungus found in Vietnam.

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Published

10-03-2026

How to Cite

Tran, T. T., Nguyen, N. L., Nguyen, T. T., Dao, T. M. A., Pham, D. N., Luu, M. D., & Do, T. T. (2026). Purification of a protein-based α-glucosidase inhibitor from Aspergillus niger VTCC 031. Vietnam Journal of Biotechnology, 24(1), 133–146. https://doi.org/10.15625/vjbt-22393

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