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Nucleic Acids Research, 1991, Vol. 19, No. 25 7231-7234
© 1991

Foreword

Expression from herpesvirus promoters does not relieve the intron requirement for cytoplasmic accumulation of human ß-globin mRNA

Xian-ming Yu+, Gregory W. Gelembiuk, Chung-Yu Wang§, Wang-Shick Ryu{dagger} and Janet E. Mertz*

McArdle Laboratory for Cancer Research, University of Wisconsin Madison, WI 53706, USA

*To whom correspondences should be addressed

Expression plasmids were constructed in which the human ß-globin gene or a variant of it precisely iacklng its two intmns was tmnscriM from its own promoter, the herpes simplex virus type 1 thymidine kinase (HSV-tk) promoter, or the immediate early promoter of human cytomegalovirus (CMV-IE). Forty two hours after transfection of these plasrnids into monkey kidney cells, nuclear and cytoplasmic RNA were isolated. Quentitative S1 nuclease mapping and primer extension analysis were us& to deternine the relative abundances, cellular locations, and leader sizes of the accumulated ß-globin RNAs. Whereas transcripts of all of the intmn-containing genes accumulated in the cytoplasm to high levels, transcripts of their cDNA vadents were neither stably maintained in the nucleus nor accumulated in the cytoplasm, irrespective of the promoter from which transcdption was driven. We conclude that the intron requirement for cytoplasmic accumuitition of ß-globin RNA can not be circumvented by synthesis from either the promoter of the intronless WSV-tk gene or the CMV-IE promoter.

+Shanghai Indtute of Biochemistry. Academia Sinica, Shangha, China

§Present address: Howard Hughes Medical Institute, University of Michigan, Medical Center, Ann Arbor, MI

{dagger}Present address: Fox Chase Cancer Center. Instimte for Cancer Research, Philadelphia, PA, USA


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