Restriction factors are host cell proteins that inhibit retroviral infection. A new study using mutants of human HIV-1 restriction factor SAMHD1 suggests that it inhibits infection through degradation of viral RNA rather than through its dNTPase activity as previously suggested.
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Yang, Z., Greene, W. A new activity for SAMHD1 in HIV restriction. Nat Med 20, 808–809 (2014). https://doi.org/10.1038/nm.3657
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DOI: https://doi.org/10.1038/nm.3657
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