This paper is the first report on the highly active bacterial
urease inhibitors belonging to the organophosphinate class of
compounds. The computer aided design using crystal structures
of Bacillus pasteurii urease allowed the development of the
novel inhibitors and proved very successful. Combination of
structural features of urease inactivators described so far, namely
phosphoramidates, hydroxamic dipeptides, and sulfur compounds,
and computational and experimental verification of this
approach led to structure 24 exhibiting Ki ) 170 nM against B.
pasteurii and 450 nM against P. Vulgaris enzymes. Thus, it ranks
among the most potent small molecular weight inhibitors of
bacterial ureases. Moreover, studied compounds are characterized
by the presence of a chemically inert C-P bond, assuring
their stability in physiological conditions. Several well-known
examples of successful applications of biologically active
phosphonates and phosphinates (glyphosate, phosphinothricin,
aledronate, phosphomycin) indicate high potential of this group
of compounds. Moreover, proposed scaffold of urease inhibitor
offers the possibility of convenient further modifications and
extensions that could give rise to structures with improved
inhibitory activity or/and selectivity toward enzymes of chosen
origin.
This paper is the first report on the highly active bacterial
urease inhibitors belonging to the organophosphinate class of
compounds. The computer aided design using crystal structures
of Bacillus pasteurii urease allowed the development of the
novel inhibitors and proved very successful. Combination of
structural features of urease inactivators described so far, namely
phosphoramidates, hydroxamic dipeptides, and sulfur compounds,
and computational and experimental verification of this
approach led to structure 24 exhibiting Ki ) 170 nM against B.
pasteurii and 450 nM against P. Vulgaris enzymes. Thus, it ranks
among the most potent small molecular weight inhibitors of
bacterial ureases. Moreover, studied compounds are characterized
by the presence of a chemically inert C-P bond, assuring
their stability in physiological conditions. Several well-known
examples of successful applications of biologically active
phosphonates and phosphinates (glyphosate, phosphinothricin,
aledronate, phosphomycin) indicate high potential of this group
of compounds. Moreover, proposed scaffold of urease inhibitor
offers the possibility of convenient further modifications and
extensions that could give rise to structures with improved
inhibitory activity or/and selectivity toward enzymes of chosen
origin.
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