2005年
cAMP-responsive element in TATA-less core promoter is essential for haploid-specific gene expression in mouse testis
NUCLEIC ACIDS RESEARCH
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- 巻
- 33
- 号
- 10
- 開始ページ
- 3401
- 終了ページ
- 3411
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1093/nar/gki652
- 出版者・発行元
- OXFORD UNIV PRESS
Promoters, including neither TATA box nor initiator, have been frequently found in testicular germ cellspecific genes in mice. These investigations imply that unique forms of the polymerase II transcription initiation machinery play a role in selective activation of germ cell-specific gene expression programs during spermatogenesis. However, there is little information about testis-specific core promoters, because useful germ cell culture system is not available. In this study, we characterize the regulatory region of the haploid-specific Oxct2b gene in detail by using in vivo transient transfection assay in combination with a transgenic approach, with electrophoretic mobility shift and chromatin immunoprecipitation assays. Expression studies using mutant constructs demonstrate that a 34 bp region, which extends from -49 to -16, acts as a core promoter in an orientation-dependent manner. This promoter region includes the cAMP-responsive element (CRE)-like sequence TGACGCAG, but contains no other motifs, such as a TATA box or initiator. The CRE-like element is indispensable for the core promoter activity, but not for activator in testicular germ cells, through the binding of a testis-specific CRE modulator transcription factor. These results indicate the presence of alternative transcriptional initiation machinery for cell-type-specific gene expression in testicular germ cells.
- リンク情報
- ID情報
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- DOI : 10.1093/nar/gki652
- ISSN : 0305-1048
- PubMed ID : 15951513
- Web of Science ID : WOS:000230649600033