Abstract
We have developed a method for nuclear export signal trapping (NEST) to isolate functional Rev clones from various types of libraries such as libraries of Rev mutants. The expression libraries are cotransfected into COS cells together with a novel Rev-dependent immunoselectable CD28 expression plasmid, pCMV128-CD28. CD28-positive cells are recovered by FACS or by immune precipitation with magnetic beads, and the low-molecular-weight extra chromosomal DNA is recovered, amplified for Rev-containing DNA by PCR and recloned into expression plasmids. The resulting clones are enriched for functional Rev clones. These can be recovered efficiently after several repetitive NEST cycles. This technique may be usefully applied to study various regions of Rev, such as the RNA binding domain and the nuclear export signal, or effector domain and potentially to the isolation of cellular factors with nuclear export capabilities.
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References
Aruffo A, Seed B. Molecular cloning of a CD28 cDNA by a high-efficiency COS cell expression system. Proc Natl Acad Sci USA 84:8573–8577;1987.
Bray M, Prasad S, Dubay JW, Hunter E, Jeang KT, Rekosh D, Hammarskjold ML. A small element from the Mason-Pfizer monkey virus genome makes human immunodeficiency virus type 1 expression and replication Rev-independent. Proc Natl Acad Sci USA 91:1256–1260;1994.
Dayton AI. The Rev axis of HIV-1 and its associated host cofactors: A viral window onto the workings of eukaryotic post-transcriptional RNA processing. J Biomed Sci 3:69–77;1996.
Hirt B. Selective extraction of polyoma DNA from infected mouse cell cultures. J Mol Biol 26:365–369;1967.
Hope TJ, McDonald D, Huang XJ, Low J, Parslow TG. Mutational analysis of human immunodeficiency virus type 1 Rev mutant without nucleolar dysfunction as a candidate for potential AIDS therapy. J Virol 64:5360–5366;1990.
Martini JF, Villares SM, Nagano M, Delahaye-Zervas Eymard B, Kelly PA, Postel-Vinay MC. Quantitative analysis by polymerase chain reaction of growth hormone receptor gene expression in human liver and muscle. Endocrinology 136:1355–1360;1995.
Zhang MJ, Dayton AI. Two secondary structures of RRE of HIV-1? J Acquir Immune Defic Syndr Hum Retrovirol 13:403–407;1996.
Zolotukhin AS, Valentin A, Pavlakis GN, Felber BK. Continuous propagation of RRE(-) and Rev(-)RRE(-) human immunodeficiency virus type 1 molecular clones containing a cisacting element of simian retrovirus type 1 in human peripheral blood lymphocytes. J Virol 68:7944–7952;1994.
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Zhang, M.J., Dayton, A.I. Development of a nuclear export signal trapping method for isolating genes with HIV rev activity. J Biomed Sci 4, 289–294 (1997). https://doi.org/10.1007/BF02258352
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DOI: https://doi.org/10.1007/BF02258352