The p69/71 2-5A synthetase promoter contains multiple regulatory elements required for interferon-α-induced expression

被引:22
作者
Wang, Q
Floyd-Smith, G [1 ]
机构
[1] Arizona State Univ, Dept Zool, Tempe, AZ 85287 USA
[2] Arizona State Univ, Dept Biol, Mol & Cellular Biol Program, Tempe, AZ 85287 USA
关键词
D O I
10.1089/dna.1997.16.1385
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The p69/71 2-5A synthetase is an interferon-inducible enzyme that polymerizes ATP to form 2'-5'-linked oligoadenylates when activated by double-stranded RNA, A genomic clone was isolated that contained 12.5 kb of the 5'-flanking region and the first exon of the p69/71 2-5A synthetase gene, The major transcriptional start site was mapped to an A residue located 84 bp upstream of the translational start site within a sequence that matches both a consensus ISRE and an Inr element. Sequencing of the region 972 bp upstream of the translation start site revealed 4 imperfect direct repeats of 70 to 80 bp that contain several putative regulatory elements, This region does not have a TATA or CAAT box but does contain two IRF-1-like elements, an Ets-1 motif, an AP-1 site, an Spl binding site, an NF-kappa B-binding site, and a palindrome containing two overlapping NF-IL-6 consensus motifs in opposite orientation, The region -480 to -850 bp contains PuF, UBP-1, and PEA 3 motifs and another NF-IL-6 motif adjacent to an E2A-binding site, The 5'-flanking sequence binds proteins in DNase I foot printing assays and is a functional interferon-inducible promoter that requires multiple elements for maximal constitutive and interferon-inducible expression.
引用
收藏
页码:1385 / 1394
页数:10
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