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. 1988 Aug;8(8):3227–3234. doi: 10.1128/mcb.8.8.3227

Presence of transcription regulatory elements within an intron of the virus-inducible murine TIMP gene.

B Coulombe 1, A Ponton 1, L Daigneault 1, B R Williams 1, D Skup 1
PMCID: PMC363554  PMID: 2850484

Abstract

The expression of the gene for the murine tissue inhibitor of metalloproteinases (TIMP) is induced in response to viruses, growth factors, and phorbol esters. In this report we show that the accumulation of TIMP mRNA after Newcastle disease virus induction is caused by transcriptional activation of the gene. Comparison of the sequences of cDNA and genomic clones along with RNase protection and primer extension analyses revealed that the murine TIMP gene possesses multiple cap sites and that the exon 1 consists exclusively of 5'-noncoding sequences. We observed that DNA regions analogous to those found upstream of the virus-inducible interferon genes are present within intron 1 of the TIMP gene. To investigate the possible role of TIMP intron 1 in gene expression, we used a functional assay based on the transfection of plasmids in which the DNA segment to be tested is placed in proximity to a marker gene driven by the heterologous herpes simplex virus thymidine kinase promoter. Our results indicate that TIMP intron 1 contains DNA sequence elements capable of modulating the activity of a heterologous promoter in two different ways: (i) by enhancing constitutive expression and (ii) by conferring virus inducibility. These results suggest that intron 1 may be involved in the transcriptional regulation of TIMP gene expression.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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