SBE13, a newly identified inhibitor of inactive polo-like kinase 1

  • Poster presentation at 5th German Conference on Cheminformatics: 23. CIC-Workshop Goslar, Germany. 8-10 November 2009 Protein kinases are important targets for drug development. The almost identical protein folding of kinases and the common co-substrate ATP leads to the problem of inhibitor selectivity. Type II inhibitors, targeting the inactive conformation of kinases, occupy a hydrophobic pocket with less conserved surrounding amino acids. Human polo-like kinase 1 (Plk1) represents a promising target for approaches to identify new therapeutic agents. Plk1 belongs to a family of highly conserved serine/threonine kinases, and is a key player in mitosis, where it modulates the spindle checkpoint at metaphase/anaphase transition. Plk1 is over-expressed in all today analyzed human tumors of different origin and serves as a negative prognostic marker in cancer patients. The newly identified inhibitor, SBE13, a vanillin derivative, targets Plk1 in its inactive conformation. This leads to selectivity within the Plk family and towards Aurora A. This selectivity can be explained by docking studies of SBE13 into the binding pocket of homology models of Plk1, Plk2 and Plk3 in their inactive conformation. SBE13 showed anti-proliferative effects in cancer cell lines of different origins with EC50 values between 5 microM and 39 microM and induced apoptosis. Increasing concentrations of SBE13 result in increasing amounts of cells in G2/M phase 13 hours after double thymidin block of HeLa cells. The kinase activity of Plk1 was inhibited with an IC50 of 200 pM. Taken together, we could show that carefully designed structure-based virtual screening is well-suited to identify selective type II kinase inhibitors targeting Plk1 as potential anti-cancer therapeutics.

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Author:Sarah Keppner, Ewgenij ProschakORCiDGND, Gisbert SchneiderORCiDGND, Birgit Spänkuch-SchmittGND
Parent Title (English):Journal of Cheminformatics
Publisher:BioMed Central
Place of publication:London
Document Type:Article
Date of Publication (online):2010/05/19
Year of first Publication:2010
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Contributing Corporation:5th German Conference on Cheminformatics: 23. CIC-Workshop Goslar, Germany. 8-10 November 2009
Release Date:2010/05/19
Issue:(Suppl 1):P54
Page Number:1
First Page:1
Last Page:1
© 2010 Sarah et al; licensee BioMed Central Ltd.
Source:Journal of Cheminformatics 2010, 2(Suppl 1):P54 ; doi:10.1186/1758-2946-2-S1-P54 ;
Institutes:Biochemie, Chemie und Pharmazie / Biochemie und Chemie
Biowissenschaften / Biowissenschaften
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie
Sammlung Biologie / Sondersammelgebiets-Volltexte
Licence (German):License LogoDeutsches Urheberrecht