Cloning of a coproporphyrinogen oxidase promoter regulatory element binding protein

Shinichiro Takahashi, Kazumichi Furuyama, Akira Kobayashi, Shigeru Taketani, Hideo Harigae, Masayuki Yamamoto, Kazuhiko Igarashi, Takeshi Sasaki, Norio Hayashi

研究成果: Article査読

13 被引用数 (Scopus)


Coproporphyrinogen oxidase [CPO] gene promoter regulatory element (CPRE) plays an important role in CPO gene regulation. To isolate a CPRE binding protein, we performed Southwestern screening of K562 cDNA expression library using CPRE as a probe and isolated a cDNA clone which encoded a novel protein, Klp1 (K562 cell-derived leucine-zipper-like protein 1). Klp1 mRNA was highly expressed in K562 cells, HeLa cells, and brain as a single transcript (1.4 kb). Gel mobility shift assays revealed that Klp1 specifically binds to CPRE. Computational analysis revealed that Klp1 has a leucine-zipper-like structure, a Leu-X-X-Leu-Leu motif, and a putative nuclear localization signal in the basic amino acid rich region. Transfection of the Klp1 expression vector into THP-1 cells resulted in transcriptional activation of a reporter construct containing CPRE. These results indicate that Klp1 is a DNA sequence-specific transcription factor that regulates gene expression of genes that contain CPRE in their regulatory region. (C) 2000 Academic Press.

ジャーナルBiochemical and biophysical research communications
出版ステータスPublished - 2000 7月 5

ASJC Scopus subject areas

  • 生物理学
  • 生化学
  • 分子生物学
  • 細胞生物学


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