6LDC

Structure of Bifidobacterium dentium beta-glucuronidase complexed with C6-nonyl uronic isofagomine

6LDC の概要

• エントリーDOI: 10.2210/pdb6ldc/pdb
• 分子名称: LacZ1 Beta-galactosidase, (2~{S},3~{S},4~{R},5~{R})-2-nonyl-4,5-bis(oxidanyl)piperidine-3-carboxylic acid (3 entities in total)
• 機能のキーワード: inhibitor, glycosidase, isofagomine, hydrolase
• 由来する生物種: Bifidobacterium dentium (strain ATCC 27534 / DSM 20436 / JCM 1195 / Bd1)
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 299504.17

構造登録者

Lin, H.-Y.,Hsieh, T.-J.,Lin, C.-H. (登録日: 2019-11-20, 公開日: 2021-01-27, 最終更新日: 2023-11-22)

主引用文献

Lin, H.Y.,Chen, C.Y.,Lin, T.C.,Yeh, L.F.,Hsieh, W.C.,Gao, S.,Burnouf, P.A.,Chen, B.M.,Hsieh, T.J.,Dashnyam, P.,Kuo, Y.H.,Tu, Z.,Roffler, S.R.,Lin, C.H.
Entropy-driven binding of gut bacterial beta-glucuronidase inhibitors ameliorates irinotecan-induced toxicity.
Commun Biol, 4:280-280, 2021

PubMed Abstract: Irinotecan inhibits cell proliferation and thus is used for the primary treatment of colorectal cancer. Metabolism of irinotecan involves incorporation of β-glucuronic acid to facilitate excretion. During transit of the glucuronidated product through the gastrointestinal tract, an induced upregulation of gut microbial β-glucuronidase (GUS) activity may cause severe diarrhea and thus force many patients to stop treatment. We herein report the development of uronic isofagomine (UIFG) derivatives that act as general, potent inhibitors of bacterial GUSs, especially those of Escherichia coli and Clostridium perfringens. The best inhibitor, C6-nonyl UIFG, is 23,300-fold more selective for E. coli GUS than for human GUS (K = 0.0045 and 105 μM, respectively). Structural evidence indicated that the loss of coordinated water molecules, with the consequent increase in entropy, contributes to the high affinity and selectivity for bacterial GUSs. The inhibitors also effectively reduced irinotecan-induced diarrhea in mice without damaging intestinal epithelial cells.

PubMed: 33664385
DOI: 10.1038/s42003-021-01815-w

実験手法

X-RAY DIFFRACTION (2.181 Å)