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Transcriptional Control of Genes Involved in Yeast Phospholipid Biosynthesis
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  • Transcriptional Control of Genes Involved in Yeast Phospholipid Biosynthesis
  • Transcriptional Control of Genes Involved in Yeast Phospholipid Biosynthesis
저자명
Wimalarathna. Roshini,Tsai. Chen-Han,Shen. Chang-Hui
간행물명
The journal of microbiology
권/호정보
2011년|49권 2호|pp.265-273 (9 pages)
발행정보
한국미생물학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

Phospholipid biosynthetic genes encode enzymes responsible for phospholipid biosynthesis. They are coordinately regulated by the availability of phospholipid precursors through the inositol-sensitive upstream activating sequence ($UAS_{INO}$). However, not all phospholipid genes are $UAS_{INO}$-containing genes and not all $UAS_{INO}$-containing genes have the same response to the phospholipid precursors. Therefore, the transcriptional regulation of phospholipid genes in response to the availability of phospholipid precursors is still unclear. Here, 22 out of 47 phospholipid biosynthetic genes were identified as $UAS_{INO}$-containing genes, including EKI1, EPT1, INM1, IPK2, KCS1, PAH1, and PIK1 which have never been reported before. We also showed, using qRTPCR technique, that 12 $UAS_{INO}$-containing genes are down-regulated by 100 ${mu}M$ inositol in the wild type cells and up-regulated by 100 ${mu}M$ inositol in the $ino2{Delta}$ cells. Therefore, it is possible that these genes are transcriptionally regulated by the $UAS_{INO}$ through the negative response of Ino2p to inositol. One other $UAS_{INO}$-containing gene might be regulated by the positive response of Ino2p to 100 ${mu}M$ inositol. Surprisingly, we found 9 $UAS_{INO}$-containing genes are not dependent on the response of Ino2p to 100 ${mu}M$ inositol, indicating that they may be regulated by other pathway. Furthermore, we identified 9 and 3 non-$UAS_{INO}$-containing genes that are possibly regulated by the negative and positive response of Ino2p to 100 ${mu}M$ inositol, respectively. Therefore, these observations provide insight into the understanding of the co-regulated phospholipid biosynthetic genes expression.