Molecular insight and mode of inhibition of α-Glucosidase and α-Amylase by pahangensin A from Alpinia pahangensis RIDL.

Kong Yong Loo, Kok Hoong Leong, Yasodha Sivasothy, Halijah Ibrahim, Khalijah Awang

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7 Citations (Scopus)


The inhibition of carbohydrate-hydrolyzing enzymes in human digestive organs is crucial in controlling blood sugar levels, which is important in treating type 2 diabetes. In the current study, pahangensin A (1), a bis-labdanic diterpene characterized previously in the rhizomes of Alpinia pahangensis Ridl., was identified as an active dual inhibitor for α-amylase (IC50=114.80 μm) and α-glucosidase (IC50=153.87 μm). This is the first report on the dual α-amylase and α-glucosidase inhibitory activities of a bis-labdanic diterpene. The Lineweaver-Burk plots of compound 1 indicate that it is a mixed-type inhibitor with regard to both enzymes. Based on molecular docking studies, compound 1 docked in a non-active site of both enzymes. The dual inhibitory activity of compound 1 makes it a suitable natural alternative in the treatment of type 2 diabetes.

Original languageEnglish
Article numbere1900032
Number of pages8
JournalChemistry & Biodiversity
Issue number6
Publication statusPublished - Jun 2019
Externally publishedYes


  • Alpinia pahangensis
  • bis-labdanic diterpene
  • dual inhibitor
  • pahangensin A
  • α-amylase
  • α-glucosidase

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