Abstract:
:4'-Ethynyl-2-fluoro-2'-deoxyadenosine (EFdA/MK-8591), a nucleoside reverse transcriptase inhibitor (NRTI) under clinical trials, is a potent and promising long-acting anti-HIV type 1 (HIV-1) agent. EFdA and its derivatives possess a modified 4'-moiety and potently inhibit the replication of a wide spectrum of HIV-1 strains resistant to existing NRTIs. Here, we report that EFdA and NRTIs with a 4'-ethynyl- or 4'-cyano-moiety exerted activity against HIV-1 with an M184V mutation and multiple NRTI-resistant HIV-1s, whereas NRTIs with other moieties (e.g., 4'-methyl) did not show this activity. Structural analysis indicated that EFdA and 4'-ethynyl-NRTIs (but not other 4'-modified NRTIs), formed strong van der Waals interactions with critical amino acid residues of reverse transcriptase. Such interactions were maintained even in the presence of a broad resistance-endowing M184V substitution, thus potently inhibiting drug-resistant HIV-1 strains. These findings also explain the mechanism for the potency of EFdA and provide insights for further design of anti-HIV-1 therapeutics.
journal_name
Cell Chem Bioljournal_title
Cell chemical biologyauthors
Takamatsu Y,Das D,Kohgo S,Hayashi H,Delino NS,Sarafianos SG,Mitsuya H,Maeda Kdoi
10.1016/j.chembiol.2018.07.014subject
Has Abstractpub_date
2018-10-18 00:00:00pages
1268-1278.e3issue
10eissn
2451-9456issn
2451-9448pii
S2451-9456(18)30266-6journal_volume
25pub_type
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