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    Biochem Biophys Res Commun. 1990 Sep 14;171(2):589-95.

    Characterization of the human immunodeficiency virus type-1 reverse transcriptase enzyme produced in yeast.

    Bathurst IC, Moen LK, Lujan MA, Gibson HL, Feucht PH, Pichuantes S, Craik CS, Santi DV, Barr PJ.

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    Chiron Corporation, Emeryville, California 94608.

    Abstract

    The reverse transcriptase (RT) of human immunodeficiency virus type-1 (HIV-1) is comprised of two subunits of approximately 66kD and 51kD. We have defined the carboxyl terminus of the 51kD molecule using the 66kD RT and HIV-1 protease (PR) expressed in yeast. Precise constructs encoding the 66kD and 51kD molecules were expressed individually, in yeast, at high levels. The purified recombinant subunits were shown to associate into heterodimers that retained both RT and RNase H activities. Only the 66kD molecule could associate into homodimers. Such homodimers retained approximately 80% of the RT activity of the heterodimers. Our data demonstrates that the 51/66kD heterodimer, analogous to that found in vivo, can be reconstituted in vitro and is more efficient in both RT and RNase H activity than the homodimer.

    PMID:
    1698361
    [PubMed - indexed for MEDLINE]

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