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. 1990 Feb;87(3):1047–1051. doi: 10.1073/pnas.87.3.1047

Molecular and functional characterization of the promoter of ETS2, the human c-ets-2 gene.

G J Mavrothalassitis 1, D K Watson 1, T S Papas 1
PMCID: PMC53407  PMID: 2405393

Abstract

The 5' end of the human c-ets-2 gene, ETS2, was cloned and characterized. The major transcription initiation start sites were identified, and the pertinent sequences surrounding the ETS2 promoter were determined. The promoter region of ETS2 does not possess typical "TATA" and "CAAT" elements. However, this promoter contains several repeat regions, as well as two consensus AP2 binding sites and three putative Sp1 sites. There is also a palindromic region similar to the serum response element of the c-fos gene, located 1400 base pairs (bp) upstream from the first major transcription initiation site. A G + C-rich sequence (GC element) with dyad symmetry can be seen in the ETS2 promoter, immediately following an unusually long (approximately 250-bp) polypurine-polypyrimidine tract. A series of deletion fragments from the putative promoter region were ligated in front of the bacterial chloramphenicol acetyltransferase gene and tested for activity following transfection into HeLa cells. The 5' boundary of the region needed for maximum promoter activity was found to be 159 bp upstream of the major initiation site. This region of 159 bp contains putative binding sites for transcription factors Sp1 and AP2 (one for each), the GC element, one small forward repeat, one inverted repeat, and half of the polypurine-pyrimidine tract. The promoter of ETS2 (within the polypyrimidine tract) serves to illustrate an alternative structure that may be present in genes with "TATA-less" promoters.

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Selected References

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