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• W2115993639 abstract "Non-hydrolyzable d-mannose 6-phosphate analogues in which the phosphate group was replaced by a phosphonomethyl, a dicarboxymethyl, or a carboxymethyl group were synthesized and kinetically evaluated as substrate analogues acting as potential inhibitors of type I phosphomannose isomerases (PMIs) from Saccharomyces cerevisiae and Escherichia coli. While 6-deoxy-6-phosphonomethyl-d-mannose and 6-deoxy-6-carboxymethyl-d-mannose did not inhibit the enzymes significantly, 6-deoxy-6-dicarboxymethyl-d-mannose appeared as a new strong competitive inhibitor of both S. cerevisiae and E. coli PMIs with Km/Ki ratios of 28 and 8, respectively. We thus report the first malonate-based inhibitor of an aldose–ketose isomerase to date. Phosphonomethyl mimics of the 1,2-cis-enediolate high-energy intermediate postulated for the isomerization reaction catalyzed by PMIs were also synthesized but behave as poor inhibitors of PMIs. A polarizable molecular mechanics (SIBFA) study was performed on the complexes of d-mannose 6-phosphate and two of its analogues with PMI from Candida albicans, an enzyme involved in yeast infection homologous to S. cerevisiae and E. coli PMIs. It shows that effective binding to the catalytic site occurs with retention of the Zn(II)-bound water molecule. Thus the binding of the hydroxyl group on C1 of the ligand to Zn(II) should be water-mediated. The kinetic study reported here also suggests the dianionic character of the phosphate surrogate as a likely essential parameter for strong binding of the inhibitor to the enzyme active site." @default.
• W2115993639 created "2016-06-24" @default.
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• W2115993639 date "2009-10-01" @default.
• W2115993639 modified "2023-10-17" @default.
• W2115993639 title "Synthesis and evaluation of non-hydrolyzable d-mannose 6-phosphate surrogates reveal 6-deoxy-6-dicarboxymethyl-d-mannose as a new strong inhibitor of phosphomannose isomerases" @default.
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• W2115993639 doi "https://doi.org/10.1016/j.bmc.2009.09.005" @default.
• W2115993639 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19783448" @default.
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