Full Sequence Amino Acid Scanning of θ-Defensin RTD-1 Yields a Potent Anthrax Lethal Factor Protease Inhibitor.
Full Sequence Amino Acid Scanning of θ-Defensin RTD-1 Yields a Potent Anthrax Lethal Factor Protease Inhibitor.
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DOI:
10.1021/acs.jmedchem.6b01689
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发表时间:
2017-03-09
影响因子:
7.3
通讯作者:
Camarero JA
中科院分区:
文献类型:
--
作者:
Li Y;Gould A;Aboye T;Bi T;Breindel L;Shekhtman A;Camarero JA
θ-Defensin RTD-1 is a non-competitive inhibitor of anthrax lethal factor (LF) protease (IC50 = 390 ± 20 nM, Ki = 365 ± 20 nM) and a weak inhibitor of other mammalian metalloproteases such as TNFα converting enzyme (TACE) (Ki = 4.45 ± 0.48 μM). Using full sequence amino acid scanning in combination with a highly efficient ‘one-pot’ cyclization-folding approach we obtained an RTD-1 based peptide that was around 10-times more active than wild type RTD-1 in inhibiting LF protease (IC50 = 43 ± 3 nM, Ki = 18 ± 1 nM). The most active peptide was completely symmetrical, rich in Arg and Trp residues, and able to adopt a native RTD-1-like structure. These results show the power of optimized chemical peptide synthesis approaches for the efficient production of libraries of disulfide-rich backbone-cyclized peptides to quickly perform structure-activity relationship studies for optimizing protease inhibitors.
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