Title |
Localization of putative binding sites for cyclic guanosine monophosphate and the anti-cancer drug 5-fluoro-2′-deoxyuridine-5′-monophosphate on ABCC11 in silico models
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Published in |
BMC Molecular and Cell Biology, May 2013
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DOI | 10.1186/1472-6807-13-7 |
Pubmed ID | |
Authors |
Mylène Honorat, Raphaël Terreux, Pierre Falson, Attilio Di Pietro, Charles Dumontet, Lea Payen |
Abstract |
The Multidrug Resistance Protein ABCC11/MRP8 is expressed in physiological barriers and tumor breast tissues in which it secretes various substrates including cGMP (cyclic guanosine monophosphate) and 5FdUMP (5-fluoro-2'-deoxyuridine-5'-monophosphate), the active metabolite of the anticancer drug 5-FluoroUracil (frequently included to anticancer therapy).Previously, we described that ABCC11 high levels are associated to the estrogen receptor (ER) expression level in breast tumors and in cell lines resistant to tamoxifen. Consequently, by lowering the intracellular concentration of anticancer drugs, ABCC11 likely promotes a multidrug resistance (MDR) phenotype and decreases efficiency of anticancer therapy of 5FdUMP. Since no experimental data about binding sites of ABCC11 substrate are available, we decided to in silico localize putative substrate interaction sites of the nucleotide derivatives. Taking advantage of molecular dynamics simulation, we also analysed their evolution under computational physiological conditions and during the time. |
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