1. The Effects of Side-Chain Configurations of a Retro-Inverso-Type Inhibitor on the Human T-Cell Leukemia Virus (HTLV)-1 Protease.
- Author
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Awahara C, Oku D, Furuta S, Kobayashi K, Teruya K, Akaji K, and Hattori Y
- Subjects
- Humans, Viral Proteases chemistry, Viral Proteases metabolism, Structure-Activity Relationship, Aspartic Acid Endopeptidases, Protease Inhibitors pharmacology, Protease Inhibitors chemistry, Human T-lymphotropic virus 1 drug effects, Human T-lymphotropic virus 1 enzymology
- Abstract
In this study, the effects of side-chain configurations of D-Ile residues of a retro-inverso (RI)-type inhibitor on the human T-cell leukemia virus type 1 (HTLV-1) protease containing a hydroxyethylamine dipeptide isostere were clarified. Prior to evaluation using the RI-type inhibitor, the effects of side-chain configurations of Ile residues of the substrate peptide on the HTLV-1 protease were examined to estimate the influence of side-chain configurations on enzyme activity. Based on the estimation of the influence of side-chain configurations on protease affinity, the RI-type inhibitors containing a D-allo-Ile residue in the corresponding substrate sequence, instead of a D-Ile residue, were synthesized via 9-fluorenylmethoxycarbonyl-based solid-phase peptide synthesis. Refolded recombinant HTLV-1 protease (1-116, L40I) was used for the simple and short evaluation of the inhibitory activities of the synthesized RI-type inhibitors. The results clearly indicated that mimicking the whole topology, comprising both the main- and side-chain structures of the parent inhibitor, is effective for the design of potent RI-modified protease inhibitors.
- Published
- 2022
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