CREB and Sp1 regulate the human CD2AP gene promoter activity in renal tubular epithelial cells

Chao Lu, Wei Ren, Xing Ming Su, Jie Qing Chen, Sheng Hua Wu, Xi Rong Guo, Song Ming Huang, Long Hua Chen, Guo Ping Zhou

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The human CD2-associated protein (CD2AP) is involved in several molecular signaling pathways and is an important factor responsible for nephrotic syndrome. Here we report the identification of the transcription start point and promoter region of the human CD2AP gene in renal tubular epithelial cells. With luciferase assays and deletion analysis, we found that the region between -558 and -1 bp ahead of the transcription start point is indispensable for the promoter activity of the human CD2AP gene. A CREB site and two Sp1 sites were essential for maintaining the basal transcriptional activity of the human CD2AP promoter. Overexpression of phosphorylated CREB and Sp1 transactivated the human CD2AP promoter, whereas small interfering RNA-mediated blockage of CREB and Sp1 genes expressions inhibited markedly its activity. These findings provide the first analysis of the human CD2AP gene promoter and demonstrate that not only CREB but also Sp1 plays a critical role in regulating basal CD2AP promoter activity in renal tubular epithelial cells.

Original languageEnglish
Pages (from-to)143-149
Number of pages7
JournalArchives of Biochemistry and Biophysics
Volume474
Issue number1
DOIs
StatePublished - Jun 1 2008

Keywords

  • cAMP-responsive element-binding protein(CREB)
  • CD2-associated protein (CD2AP)
  • Promoter regulation
  • Stimulating protein 1 (Sp1)
  • Transcriptional factor

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