Abstract
Based on the results from previously reported molecular modeling analyses of the interactions between the inhibitor microcystin and the serine-threonine protein phosphatases 1 and 2A, we have designed analogues of microcystin LA with structural modifications intended to impart PP1 selectivity. The synthesis of several first generation analogues followed by inhibition assays revealed that all three are PP1-selective, as predicted. Although the observed selectivities are modest, one of the designed analogues is more selective for PP1 than any known small molecule inhibitor.
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Enzyme Inhibitors / chemical synthesis
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Enzyme Inhibitors / chemistry*
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Enzyme Inhibitors / pharmacology*
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Magnetic Resonance Spectroscopy
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Mass Spectrometry
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Microcystins
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Peptides, Cyclic / chemical synthesis
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Peptides, Cyclic / chemistry*
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Peptides, Cyclic / pharmacology*
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Phosphoprotein Phosphatases / antagonists & inhibitors*
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Phosphoprotein Phosphatases / metabolism
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Protein Phosphatase 1
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Spectrophotometry, Infrared
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Substrate Specificity
Substances
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Enzyme Inhibitors
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Microcystins
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Peptides, Cyclic
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cyanoginosin-LA
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Phosphoprotein Phosphatases
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Protein Phosphatase 1