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- W1439783595 abstract "Kunitz-type peptides from venomous animals are an important source of lead drug candidates towards human plasmin, a target of protease-associated diseases. However, no Kunitz-type plasmin inhibitor from venomous scorpion has been characterized. Here, we first investigated plasmin inhibiting activities of eight known Kunitz-type scorpion toxins Hg1, BmKTT-1, BmKTT-2, BmKTT-3, LmKTT-1a, LmKTT-1b, LmKTT-1c and BmKPI, and found a new plasmin inhibitor BmKTT-2, a Kunitz-type toxin peptide from the scorpion Buthus martensi karch. Protease inhibitory activity assay showed that BmKTT-2 potently inhibited plasmin with a Ki value of 8.75 ± 2.05 nM. Structure–function relationship studies between BmKTT-2 and plasmin showed that BmKTT-2 is a classical Kunitz-type plasmin inhibitor: Lys13 in BmKTT-2 is the P1 site, and Ala14 in BmKTT-2 is the P1′ site. Interestingly, BmKTT-2 has potent inhibiting activities towards three important digestive serine proteases trypsin, chymotrypsin and elastase, suggesting a good stability for administering oral medications. To the best of our knowledge, BmKTT-2 is the first Kunitz-type human plasmin inhibitor from scorpion venom, providing novel insights into drug developments targeting human plasmin protease." @default.
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- W1439783595 date "2015-11-01" @default.
- W1439783595 modified "2023-10-14" @default.
- W1439783595 title "A new Kunitz-type plasmin inhibitor from scorpion venom" @default.
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- W1439783595 doi "https://doi.org/10.1016/j.toxicon.2015.09.004" @default.
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