PMID: 7540287May 25, 1995Paper

RNA polymerase III promoter and terminator elements affect Alu RNA expression

Nucleic Acids Research
W M ChuC W Schmid

Abstract

Promoter elements derived from the 7SL RNA gene stimulate RNA polymerase III (Pol III) directed Alu transcription in vitro. These elements also stimulate expression of Alus transfected into 293 cells, but transcripts from these same constructs are undetectable in HeLa cells. A terminator resembling the terminator for the 7SL RNA gene has no effect on in vitro Alu template activity, but increases expression in vivo in a position independent manner. Alu transcripts generated from templates with and without this terminator have identical half-lives, indicating that this terminator stimulates expression by increasing template activity. Together, these results show that Alu expression may be regulated at multiple levels and can respond to cis-acting elements. This new found ability to express Alu transcripts by transient transfection provides an opportunity to monitor their post-transcriptional fate. Primary Alu transcripts are not extensively adenylated or deadenylated following transcription, but are short-lived compared to 118 nt scAlu RNA. In addition to Alu RNA, transfected templates encode scAlu RNA, but very high levels of Alu RNA expression does not increase the abundance of scAluRNA. ScAluRNA is not merely a transient RNA d...Continue Reading

Citations

Dec 25, 2003·Gene·Tzu Huey Li, Carl W Schmid
Apr 16, 1996·Proceedings of the National Academy of Sciences of the United States of America·R J Maraia
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