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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 ACS+Med+Chem+Lett
2012 ; 3
(3
): 193-7
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BACE1 Inhibitor Peptides: Can an Infinitely Small k cat 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
PMID24900449
show 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.