3CF8

Crystal structure of (3R)-Hydroxyacyl-Acyl Carrier Protein Dehydratase (FabZ) from Helicobacter pylori in complex with quercetin

3CF8 の概要

• エントリーDOI: 10.2210/pdb3cf8/pdb
• 関連するPDBエントリー: 2GLL 3CF9 3D04
• 分子名称: (3R)-hydroxymyristoyl-acyl carrier protein dehydratase, CHLORIDE ION, BENZAMIDINE, ... (5 entities in total)
• 機能のキーワード: fabz complex, quercetin, cytoplasm, lipid a biosynthesis, lipid synthesis, lyase
• 由来する生物種: Helicobacter pylori
• 細胞内の位置: Cytoplasm : Q5G940
• タンパク質・核酸の鎖数: 6
• 化学式量合計: 110774.82

構造登録者

Zhang, L.,Wu, D.,Liu, W.,Shen, X.,Jiang, H. (登録日: 2008-03-03, 公開日: 2008-12-09, 最終更新日: 2024-03-13)

主引用文献

Zhang, L.,Kong, Y.,Wu, D.,Zhang, H.,Wu, J.,Chen, J.,Ding, J.,Hu, L.,Jiang, H.,Shen, X.
Three flavonoids targeting the beta-hydroxyacyl-acyl carrier protein dehydratase from Helicobacter pylori: crystal structure characterization with enzymatic inhibition assay
Protein Sci., 17:1971-1978, 2008

PubMed Abstract: Flavonoids are the major functional components of many herbal and insect preparations and demonstrate varied pharmacological functions including antibacterial activity. Here by enzymatic assay and crystal structure analysis, we studied the inhibition of three flavonoids (quercetin, apigenin, and (S)-sakuranetin) against the beta-hydroxyacyl-acyl carrier protein dehydratase from Helicobacter pylori (HpFabZ). These three flavonoids are all competitive inhibitors against HpFabZ by either binding to the entrance of substrate tunnel B (binding model A) or plugging into the tunnel C near the catalytic residues (binding model B) mainly by hydrophobic interaction and hydrogen-bond pattern. Surrounded by hydrophobic residues of HpFabZ at both positions of models A and B, the methoxy group at C-7 of (S)-sakuranetin seems to play an important role for the inhibitor's binding to HpFabZ, partly responsible for the higher inhibitory activity of (S)-sakuranetin than those of quercetin and apigenin against HpFabZ (IC(50) in microM: (S)-sakuranetin, 2.0 +/- 0.1; quercetin: 39.3 +/- 2.7; apigenin, 11.0 +/- 2.5). Our work is expected to supply useful information for understanding the potential antibacterial mechanism of flavonoids.

PubMed: 18780820
DOI: 10.1110/ps.036186.108

実験手法

X-RAY DIFFRACTION (2.4 Å)