8ORP

Crystal structure of Drosophila melanogaster alpha-amylase in complex with the inhibitor acarbose

8ORP の概要

• エントリーDOI: 10.2210/pdb8orp/pdb
• 関連するPDBエントリー: 8OR6
• 分子名称: Alpha-amylase A, 4,6-dideoxy-4-{[(1S,2S,3S,4R,5R)-2,3,4-trihydroxy-5-(hydroxymethyl)cyclohexyl]amino}-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-beta-D-glucopyranose, 4,6-dideoxy-4-{[(1S,2S,3S,4R,5R)-2,3,4-trihydroxy-5-(hydroxymethyl)cyclohexyl]amino}-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose, ... (7 entities in total)
• 機能のキーワード: alpha-amylase, alpha-1, 4-glucan-4-glucanohydrolase, beta- alpha-eight barrel, adaptation, hydrolase, inhibitor, acarbose
• 由来する生物種: Drosophila melanogaster (fruit fly)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 112640.84

構造登録者

Aghajari, N.,Haser, R. (登録日: 2023-04-16, 公開日: 2023-08-16, 最終更新日: 2025-10-01)

主引用文献

Rhimi, M.,Da Lage, J.L.,Haser, R.,Feller, G.,Aghajari, N.
Structural and Functional Characterization of Drosophila melanogaster alpha-Amylase.
Molecules, 28:-, 2023

PubMed Abstract: Insects rely on carbohydrates such as starch and glycogen as an energy supply for growth of larvae and for longevity. In this sense α-amylases have essential roles under extreme conditions, e.g., during nutritional or temperature stress, thereby contributing to survival of the insect. This makes them interesting targets for combating insect pests. α-amylase, DMA, which belongs to the glycoside hydrolase family 13, sub family 15, has been studied from an evolutionary, biochemical, and structural point of view. Our studies revealed that the DMA enzyme is active over a broad temperature and pH range, which is in agreement with the fluctuating environmental changes with which the insect is confronted. Crystal structures disclosed a new nearly fully solvated metal ion, only coordinated to the protein via Gln263. This residue is only conserved in the subgroup of and may thus contribute to the enzyme adaptive response to large temperature variations. Studies of the effect of plant inhibitors and the pseudo-tetrasaccharide inhibitor acarbose on DMA activity, allowed us to underline the important role of the so-called flexible loop on activity/inhibition, but also to suggest that the inhibition modes of the wheat inhibitors WI-1 and WI-3 on DMA, are likely different.

PubMed: 37513201
DOI: 10.3390/molecules28145327

実験手法

X-RAY DIFFRACTION (2 Å)