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Title: A two plasmid co-expression system in Escherichia coli for the production of virion-like reverse transcriptase of the human immunodeficiency virus type 1
Authors: Jonckheere, Heidi ×
De Vreese, Karen
Debyser, Zeger
Vandekerckhove, Joel
Balzarini, Jan
Desmyter, Jan
De Clercq, Erik
Anné, Jozef #
Issue Date: Apr-1996
Series Title: Journal of virological methods vol:61 issue:1-2 pages:113-25
Abstract: Many bacterial expression systems have been developed to study the reverse transcriptase (RT) of human immunodeficiency virus type 1 (HIV-1). This enzyme exists in the virions as a heterodimer of a 66 kDa (p66) subunit and a 51 kDa (p51) subunit, originating through proteolytic maturation of the p66 subunit. Most expression systems rely on the processing of p66 by bacterial proteases, this results in a p51 subunit with a non-authentic carboxy-terminus. In contrast, the expression system described produces an RT with an authentic carboxy-terminus. This was achieved by the co-expression of the two subunits of HIV-1 RT, which were each cloned on a different, compatible plasmid in Escherichia coli, and by the use of protease inhibitors during cell lysis. This approach enabled us not only to obtain virion-like RT, as verified by mass spectrometry, but also to monitor the effect of mutations in one or both subunits on the activity of RT and on its sensitivity towards RT inhibitors. The co-expression system described represents a useful method to produce HIV-1 RT, both authentic and mutated, in quantities that allow large-scale studies on the functional organisation of the RT-subunits and the sensitivity of the enzyme to RT inhibitors.
ISSN: 0166-0934
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory of Virology and Chemotherapy (Rega Institute)
Molecular Virology and Gene Therapy
Laboratory of Molecular Bacteriology (Rega Institute)
× corresponding author
# (joint) last author

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