Alpha-amylase inhibitor (IPR000833)

Short name: A-amylase_inhib

Overlapping homologous superfamilies

Family relationships



Alpha-amylase inhibitor inhibits mammalian alpha-amylases specifically, by forming a tight stoichiometric 1:1 complex with alpha-amylase. The inhibitor has no action on plant and microbial alpha amylases.

A crystal structure has been determined for tendamistat, the 74-amino acid inhibitor produced by Streptomyces tendae that targets a wide range of mammalian alpha-amylases [PMID: 14501112]. The binding of tendamistat to alpha-amylase leads to the steric blockage of the active site of the enzyme. The crystal structure of tendamistat revealed an immunoglobulin-like fold that could potentially adopt multiple conformations. Such molecular flexibility could enable an induced-fit type of binding that would both optimise binding and allow broad target specificity.

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

GO:0015066 alpha-amylase inhibitor activity

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.