3CF8

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

Summary for 3CF8

• Entry DOI: 10.2210/pdb3cf8/pdb
• Related: 2GLL 3CF9 3D04
• Descriptor: (3R)-hydroxymyristoyl-acyl carrier protein dehydratase, CHLORIDE ION, BENZAMIDINE, ... (5 entities in total)
• Functional Keywords: fabz complex, quercetin, cytoplasm, lipid a biosynthesis, lipid synthesis, lyase
• Biological source: Helicobacter pylori
• Cellular location: Cytoplasm : Q5G940
• Total number of polymer chains: 6
• Total formula weight: 110774.82

Authors

Zhang, L.,Wu, D.,Liu, W.,Shen, X.,Jiang, H. (deposition date: 2008-03-03, release date: 2008-12-09, Last modification date: 2024-03-13)

Primary citation

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

Experimental method

X-RAY DIFFRACTION (2.4 Å)