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2015 ; 6
(5
): 2802-2805
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English Wikipedia
Molecular glues for manipulating enzymes: trypsin inhibition by
benzamidine-conjugated molecular glues
#MMPMID28706668
Mogaki R
; Okuro K
; Aida T
Chem Sci
2015[May]; 6
(5
): 2802-2805
PMID28706668
show ga
Water-soluble bioadhesive polymers bearing multiple guanidinium ion (Gu(+))
pendants at their side-chain termini (Glue (n) -BA, n = 10 and 29) that were
conjugated with benzamidine (BA) as a trypsin inhibitor were developed. The Glue
(n) -BA molecules are supposed to adhere to oxyanionic regions of the trypsin
surface, even in buffer, via a multivalent Gu(+)/oxyanion salt-bridge
interaction, such that their BA group properly blocks the substrate-binding site.
In fact, Glue(10)-BA and Glue(29)-BA exhibited 35- and 200-fold higher affinities
for trypsin, respectively, than a BA derivative without the glue moiety (TEG-BA).
Most importantly, Glue(10)-BA inhibited the protease activity of trypsin 13-fold
more than TEG-BA. In sharp contrast, (m) Glue(27)-BA, which bears 27 Gu(+) units
along the main chain and has a 5-fold higher affinity than TEG-BA for trypsin,
was inferior even to TEG-BA for trypsin inhibition.