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Biochemical, inhibition and inhibitor resistance studies of xenotropic murine leukemia virus-related virus reverse transcriptase.

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  • معلومة اضافية
    • المصدر:
      Publisher: Oxford University Press Country of Publication: England NLM ID: 0411011 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1362-4962 (Electronic) Linking ISSN: 03051048 NLM ISO Abbreviation: Nucleic Acids Res Subsets: MEDLINE
    • بيانات النشر:
      Publication: 1992- : Oxford : Oxford University Press
      Original Publication: London, Information Retrieval ltd.
    • الموضوع:
    • نبذة مختصرة :
      We report key mechanistic differences between the reverse transcriptases (RT) of human immunodeficiency virus type-1 (HIV-1) and of xenotropic murine leukemia virus-related virus (XMRV), a gammaretrovirus that can infect human cells. Steady and pre-steady state kinetics demonstrated that XMRV RT is significantly less efficient in DNA synthesis and in unblocking chain-terminated primers. Surface plasmon resonance experiments showed that the gammaretroviral enzyme has a remarkably higher dissociation rate (k(off)) from DNA, which also results in lower processivity than HIV-1 RT. Transient kinetics of mismatch incorporation revealed that XMRV RT has higher fidelity than HIV-1 RT. We identified RNA aptamers that potently inhibit XMRV, but not HIV-1 RT. XMRV RT is highly susceptible to some nucleoside RT inhibitors, including Translocation Deficient RT inhibitors, but not to non-nucleoside RT inhibitors. We demonstrated that XMRV RT mutants K103R and Q190M, which are equivalent to HIV-1 mutants that are resistant to tenofovir (K65R) and AZT (Q151M), are also resistant to the respective drugs, suggesting that XMRV can acquire resistance to these compounds through the decreased incorporation mechanism reported in HIV-1.
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    • Grant Information:
      AI079801 United States AI NIAID NIH HHS; AI076119 United States AI NIAID NIH HHS; R01 AI073098 United States AI NIAID NIH HHS; R25 GM056901 United States GM NIGMS NIH HHS; Canada CAPMC CIHR; AI094715 United States AI NIAID NIH HHS; AI074389 United States AI NIAID NIH HHS
    • الرقم المعرف:
      0 (Aptamers, Nucleotide)
      0 (Nucleotides)
      0 (Organophosphonates)
      0 (Reverse Transcriptase Inhibitors)
      4B9XT59T7S (Zidovudine)
      9007-49-2 (DNA)
      99YXE507IL (Tenofovir)
      EC 2.7.7.- (reverse transcriptase, Human immunodeficiency virus 1)
      EC 2.7.7.49 (HIV Reverse Transcriptase)
      EC 2.7.7.49 (RNA-Directed DNA Polymerase)
      EC 3.2.1.23 (beta-Galactosidase)
      JAC85A2161 (Adenine)
    • الموضوع:
      Date Created: 20110913 Date Completed: 20120227 Latest Revision: 20211020
    • الموضوع:
      20231215
    • الرقم المعرف:
      PMC3245923
    • الرقم المعرف:
      10.1093/nar/gkr694
    • الرقم المعرف:
      21908397