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Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 ACS+Med+Chem+Lett 2012 ; 3 (3): 193-7 Nephropedia Template TP
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BACE1 Inhibitor Peptides: Can an Infinitely Small kcat Value Turn the Substrate of an Enzyme into Its Inhibitor? #MMPMID24900449
Hamada Y; Ishiura S; Kiso Y
ACS Med Chem Lett 2012[Mar]; 3 (3): 193-7 PMID24900449show ga
Recently, we reported substrate-based pentapeptidic ?-secretase (BACE1) inhibitors with a hydroxymethylcarbonyl isostere as a substrate transition-state mimic. These inhibitors showed potent BACE1 inhibitory activity in enzyme and cell assays, with KMI-429 showing in vivo inhibition of A? production. We also designed and synthesized nonpeptidic and small-sized BACE1 inhibitors using ?in-silico conformational structure-based design?. By studying the structure?activity relationship of these inhibitors, we found that the ??? interaction of an inhibitor with the BACE1-Arg235 side chain played a key role in the inhibition of BACE1. We speculated that a peptide capable of binding to the BACE1-Arg235 side chain via the ??? interaction might exhibit BACE1 inhibitory activity. Hence, we designed and synthesized a series of peptides that were modified at the P2 position and found that some of these peptides exhibited a potent BACE1 inhibitory activity despite their structural similarity to the BACE1 substrate.