Improvement of promoter activity by the introduction of multiple copies of the conserved region III sequence, involved in the efficient expression of Aspergillus oryzae amylase-encoding genes

T. Minetoki, C. Kumagai, K. Gomi, K. Kitamoto, K. Takahashi

研究成果: Article査読

78 被引用数 (Scopus)

抄録

The role of the conserved sequence region III in the promoter regions of the amylase-encoding genes amyB, glaA and agdA of Aspergillus oryzae was examined. Introduction of multiple copies of the region III fragment into the agdA promoter resulted in a significant increase in promoter activity at the transcriptional level. This result suggests that the fragment comprising region III consists of one or more cis-acting sequence(s). Moreover, expression of the agdA gene under the control of the improved agdA promoter resulted in efficient overproduction of α-glucosidase, even in the presence of glucose. Thus, overexpression of genes controlled by the improved promoter incorporating region III is possible. Interestingly, expression of the amyB and glaA genes in the transformant was strongly repressed. This result suggests that the trans-acting regulatory protein(s) that interact with region III are common to these amylase genes and that the titration of regulatory protein(s) reduced the expression of the amyB and glaA genes.

本文言語English
ページ(範囲)459-467
ページ数9
ジャーナルApplied Microbiology and Biotechnology
50
4
DOI
出版ステータスPublished - 1998
外部発表はい

ASJC Scopus subject areas

  • バイオテクノロジー
  • 応用微生物学とバイオテクノロジー

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