Journal
JOURNAL OF MEDICINAL CHEMISTRY
Volume 50, Issue 12, Pages 2916-2920Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jm061455n
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The photoswitchable N-terminal diazo and triazene-dipeptide aldehydes 8a-d, 10a,b, and 17a,b present predominantly as the (E)-isomer, which purportedly binds deep in the S-3 pocket of calpain. All compounds are potent inhibitors of m-calpain, with 8b being the most active (IC50 of 35 nM). The diazo-containing inhibitors 8a, 8c, and 10a were irradiated at 340 nm to give a photostationary state enriched in the (Z)-isomer, and in all cases, these were less active. The most water soluble triazene 17a (IC50 of 90 nM) retards calpain-induced cataract formation in lens culture.
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