van der Waals interactions govern C-β-D-glucopyranosyl triazoles’ nM inhibitory potency in human liver glycogen phosphorylase

Anastassia L. Kantsadi, George A. Stravodimos, Efthimios Kyriakis, Demetra S.M. Chatzileontiadou, Theodora G.A. Solovou, Sándor Kun, Éva Bokor, L. Somsák, Demetres D. Leonidas

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

3-(C-Glucopyranosyl)-5aryl-1,2,4-triazoles with an aryl moiety larger than phenyl have been shown to have strong inhibitory potency (Ki values in the range of upper nM) for human liver glycogen phosphorylase (hlGP), a pharmacologically relevant target for diabetes type 2. In this study we investigate in a comparative manner the inhibitory effect of the above triazoles and their respective imidazoles on hlGPa. Kinetic studies show that the imidazole derivatives are 6–8 times more potent than their corresponding triazoles. We also seek to answer how the type of the aryl moiety affects the potency in hlGPa, and by determination of the crystal structure of rmGPb in complex with the triazole derivatives the structural basis of their inhibitory efficacy is also elucidated. Our studies revealed that the van der Waals interactions between the aryl moiety and residues in a hydrophobic pocket within the active site are mainly responsible for the variations in the potency of these inhibitors.

Original languageEnglish
Pages (from-to)57-67
Number of pages11
JournalJournal of Structural Biology
Volume199
Issue number1
DOIs
Publication statusPublished - Jul 1 2017

Fingerprint

Glycogen Phosphorylase
Liver Glycogen
Triazoles
Imidazoles
Type 2 Diabetes Mellitus
Catalytic Domain

Keywords

  • 1,2,4-triazole
  • C-glucopyranosyl derivatives
  • Diabetes type 2
  • Glycogen metabolism
  • Glycogen phosphorylase
  • Imidazole
  • Inhibitor
  • X-ray crystallography

ASJC Scopus subject areas

  • Structural Biology

Cite this

Kantsadi, A. L., Stravodimos, G. A., Kyriakis, E., Chatzileontiadou, D. S. M., Solovou, T. G. A., Kun, S., ... Leonidas, D. D. (2017). van der Waals interactions govern C-β-D-glucopyranosyl triazoles’ nM inhibitory potency in human liver glycogen phosphorylase. Journal of Structural Biology, 199(1), 57-67. https://doi.org/10.1016/j.jsb.2017.05.001

van der Waals interactions govern C-β-D-glucopyranosyl triazoles’ nM inhibitory potency in human liver glycogen phosphorylase. / Kantsadi, Anastassia L.; Stravodimos, George A.; Kyriakis, Efthimios; Chatzileontiadou, Demetra S.M.; Solovou, Theodora G.A.; Kun, Sándor; Bokor, Éva; Somsák, L.; Leonidas, Demetres D.

In: Journal of Structural Biology, Vol. 199, No. 1, 01.07.2017, p. 57-67.

Research output: Contribution to journalArticle

Kantsadi, AL, Stravodimos, GA, Kyriakis, E, Chatzileontiadou, DSM, Solovou, TGA, Kun, S, Bokor, É, Somsák, L & Leonidas, DD 2017, 'van der Waals interactions govern C-β-D-glucopyranosyl triazoles’ nM inhibitory potency in human liver glycogen phosphorylase', Journal of Structural Biology, vol. 199, no. 1, pp. 57-67. https://doi.org/10.1016/j.jsb.2017.05.001
Kantsadi, Anastassia L. ; Stravodimos, George A. ; Kyriakis, Efthimios ; Chatzileontiadou, Demetra S.M. ; Solovou, Theodora G.A. ; Kun, Sándor ; Bokor, Éva ; Somsák, L. ; Leonidas, Demetres D. / van der Waals interactions govern C-β-D-glucopyranosyl triazoles’ nM inhibitory potency in human liver glycogen phosphorylase. In: Journal of Structural Biology. 2017 ; Vol. 199, No. 1. pp. 57-67.
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