Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Binding Models of Flavonols to Human Vascular Endothelial Growth Factor Receptor 2

  • Lee, Jee-Young (Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University) ;
  • Jeong, Ki-Woong (Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University) ;
  • Kim, Woong-Hee (Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University) ;
  • Heo, Yong-Seok (Department of Chemistry, Konkuk University) ;
  • Kim, Yang-Mee (Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University)
  • Published : 2009.09.20
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Abstract

Human vascular endothelial growth factor receptor 2 (hVEGFR2) is an important signaling protein involved in angiogenesis and attractive drug target in cancer therapy. It has been reported that flavonols, a class of flavonoids, have anti-angiogenic activity in various cancer cell lines. We performed receptor-oriented pharmacophore based in silico screening for identification of hVEGFR2 inhibitors from flavonol database. By comparing with three X-ray complex structures of hVEGFR2 and its inhibitors, we evaluated the specific interactions between inhibitors and receptors and determined a single pharmacophore map. This map consisted of four features, a hydrogen bonding acceptor (HBA) on Cys917, two hydrogen bonding donors on Glu917 (HBD1) and Glu883 (HBD2), and one hydrophobic interaction (Lipo) with Val846, Ala864, Val897, Val914 and Phe1045 of hVEGFR2. Using this map, we searched a flavonol database including 9 typical flavonols and proposed that five flavonols, kaempferol, quercetin, fisetin, morin, and rhamnetin can be potent inhibitors of hVEGFR2. 3-OH of C-ring and 4’-OH of B-ring of flavonols are the essential features for hVEGFR2 inhibition. This study will be helpful for understanding the mechanism of inhibition of hVEGFR2 by natural products.

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