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- W1979179932 abstract "Abstract Staphylococcal nuclease is a Ca2+-activated, extracellular phosphodiesterase which degrades DNA or RNA ot 3′-nucleotides. The enzyme is strongly inhibited by deoxythymidine 3′,5′-diphosphate (pdTp). The high resolution crystal structure of the nuclease-pdTp-Ca2+ complex has facilitated a proposed mechanism of action. However, attempts to test this mechanism in solution have been frustrated by the lack of non-hydrolyzable dinucleotide analogues. Here we report a novel synthesis route for several isoteric phosphonate analogues of pdTpdT. Binding and kinetic experiments show that the phosphonate derivatives competitively inhibit enzymatic activity while stabilizing the protein's tertiary conformation. A description of the active site as seen in the nuclease-dinucleoside phosphate (pcdTpcdT)-Ca2+ complex at 2.0 A resolution is presented." @default.
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- W1979179932 date "1995-02-01" @default.
- W1979179932 modified "2023-09-27" @default.
- W1979179932 title "The binding of dinucleoside phosphonates in the active site of the metallo-enzyme, Staphylococcal nuclease: synthetic, solution and preliminary crystallographic studies" @default.
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- W1979179932 doi "https://doi.org/10.1016/0020-1693(94)04276-2" @default.
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