Comparison of the promoters of the mouse (APEX) and human (APE) apurinic endonuclease genes

Lynn Harrison, Antony Gian Ascione, Yuichi Takiguchi, David M. Wilson, David J. Chen, Bruce Demple

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We investigated the minimal promoter of APEX, which encodes mouse apurinic DNA repair endonuclease. A 1.85-kb fragment with APEX upstream sequences and ~ 290 bp of the transcribed region linked to a chloramphenicol acetyltransferase (CAT) reporter gene was assayed by transient transfection in NIH-3T3 cells. The minimal APEX promoter was comprised of ~ 190 bp of upstream and ~ 170 bp of transcribed DNA (exon 1 and most of intron 1). This ~ 360-bp region contains two CCAAT boxes and other consensus protein binding sites, but no TATA box. Deletion of the 5'-most CCAAT box decreased activity ~ 5-fold. The second CCAAT box (situated in exon 1) may play an independent role in APEX expression. Transcription start sites have been identified downstream of the second CCAAT box, and DNase I footprinting demonstrated NIH-3T3 nuclear proteins binding this region, including an Sp1 site located between the CCAAT boxes. Electrophoretic mobility-shift assays indicated binding by purified Sp1. Mouse proteins did not bind three myc-like (USF) sites in the APEX promoter, in contrast to the APE promoter. The APEX and APE promoter had similar activity in Hela cells, but in mouse cells, the murine promoter had ~ 5-fold higher activity than did the human promoter. Both the APEX and APE promoters exhibited bidirectional activity in their cognate cells.

Original languageEnglish (US)
Pages (from-to)159-172
Number of pages14
JournalMutation Research - DNA Repair
Volume385
Issue number3
DOIs
StatePublished - Dec 1997

Fingerprint

DNA-(Apurinic or Apyrimidinic Site) Lyase
Protein Binding
Exons
Genes
NIH 3T3 Cells
Electrophoretic mobility
TATA Box
Chloramphenicol O-Acetyltransferase
Endonucleases
Transcription Initiation Site
Deoxyribonuclease I
DNA
Electrophoretic Mobility Shift Assay
Nuclear Proteins
Reporter Genes
HeLa Cells
Human Activities
DNA Repair
Introns
Transfection

Keywords

  • Abasic site
  • Development
  • DNA repair
  • Redox regulation
  • Transcription

ASJC Scopus subject areas

  • Toxicology
  • Genetics
  • Molecular Biology

Cite this

Harrison, L., Ascione, A. G., Takiguchi, Y., Wilson, D. M., Chen, D. J., & Demple, B. (1997). Comparison of the promoters of the mouse (APEX) and human (APE) apurinic endonuclease genes. Mutation Research - DNA Repair, 385(3), 159-172. https://doi.org/10.1016/S0921-8777(97)00053-0

Comparison of the promoters of the mouse (APEX) and human (APE) apurinic endonuclease genes. / Harrison, Lynn; Ascione, Antony Gian; Takiguchi, Yuichi; Wilson, David M.; Chen, David J.; Demple, Bruce.

In: Mutation Research - DNA Repair, Vol. 385, No. 3, 12.1997, p. 159-172.

Research output: Contribution to journalArticle

Harrison, L, Ascione, AG, Takiguchi, Y, Wilson, DM, Chen, DJ & Demple, B 1997, 'Comparison of the promoters of the mouse (APEX) and human (APE) apurinic endonuclease genes', Mutation Research - DNA Repair, vol. 385, no. 3, pp. 159-172. https://doi.org/10.1016/S0921-8777(97)00053-0
Harrison, Lynn ; Ascione, Antony Gian ; Takiguchi, Yuichi ; Wilson, David M. ; Chen, David J. ; Demple, Bruce. / Comparison of the promoters of the mouse (APEX) and human (APE) apurinic endonuclease genes. In: Mutation Research - DNA Repair. 1997 ; Vol. 385, No. 3. pp. 159-172.
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