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HXT5 expression is under control of STRE and HAP elements in the HXT5 promoter.
Yeast. 2004 Jul 15; 21(9):747-57.Y

Abstract

Hexose transporter (Hxt) proteins transport glucose across the plasma membrane in the yeast Saccharomyces cerevisiae. Recently, we have shown that expression of HXT5 is regulated by the growth rate of the cells. Because gene expression is regulated by binding of specific transcription factors to regulatory elements in the promoters of genes, the presence of putative regulatory elements in the promoter of HXT5 was determined by computer-assisted analysis. This revealed the presence of two putative stress-responsive elements (STREs), one putative post-diauxic shift (PDS) element and two putative Hap2/3/4/5p (HAP) complex binding elements. The involvement of these elements was studied by using mutations in a HXT5 promoter-LacZ fusion construct. Growth during various conditions that result in low growth rates of yeast cells revealed that the STRE most proximal to the translation initiation site seemed to be involved in particular in regulation of HXT5 expression during growth at decreased growth rates. In addition, the HAP elements seemed to be required during growth on non-fermentable carbon sources. The PDS element and, to a lesser extent, the other STRE showed particular involvement in regulation of HXT5 expression during growth on ethanol. Finally, it was shown that the PKA pathway, which is known to be involved in expression of STRE-regulated genes, was also involved in regulation of HXT5 expression. A possible mechanism by which expression of HXT5 could be regulated by the transcriptional regulatory elements in the promoter is discussed.

Authors+Show Affiliations

Department of Molecular Cell Biology and the Institute of Biomembranes, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15282798

Citation

Verwaal, René, et al. "HXT5 Expression Is Under Control of STRE and HAP Elements in the HXT5 Promoter." Yeast (Chichester, England), vol. 21, no. 9, 2004, pp. 747-57.
Verwaal R, Arako M, Kapur R, et al. HXT5 expression is under control of STRE and HAP elements in the HXT5 promoter. Yeast. 2004;21(9):747-57.
Verwaal, R., Arako, M., Kapur, R., Verkleij, A. J., Verrips, C. T., & Boonstra, J. (2004). HXT5 expression is under control of STRE and HAP elements in the HXT5 promoter. Yeast (Chichester, England), 21(9), 747-57.
Verwaal R, et al. HXT5 Expression Is Under Control of STRE and HAP Elements in the HXT5 Promoter. Yeast. 2004 Jul 15;21(9):747-57. PubMed PMID: 15282798.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - HXT5 expression is under control of STRE and HAP elements in the HXT5 promoter. AU - Verwaal,René, AU - Arako,Megumi, AU - Kapur,Rick, AU - Verkleij,Arie J, AU - Verrips,C Theo, AU - Boonstra,Johannes, PY - 2004/7/30/pubmed PY - 2004/9/21/medline PY - 2004/7/30/entrez SP - 747 EP - 57 JF - Yeast (Chichester, England) JO - Yeast VL - 21 IS - 9 N2 - Hexose transporter (Hxt) proteins transport glucose across the plasma membrane in the yeast Saccharomyces cerevisiae. Recently, we have shown that expression of HXT5 is regulated by the growth rate of the cells. Because gene expression is regulated by binding of specific transcription factors to regulatory elements in the promoters of genes, the presence of putative regulatory elements in the promoter of HXT5 was determined by computer-assisted analysis. This revealed the presence of two putative stress-responsive elements (STREs), one putative post-diauxic shift (PDS) element and two putative Hap2/3/4/5p (HAP) complex binding elements. The involvement of these elements was studied by using mutations in a HXT5 promoter-LacZ fusion construct. Growth during various conditions that result in low growth rates of yeast cells revealed that the STRE most proximal to the translation initiation site seemed to be involved in particular in regulation of HXT5 expression during growth at decreased growth rates. In addition, the HAP elements seemed to be required during growth on non-fermentable carbon sources. The PDS element and, to a lesser extent, the other STRE showed particular involvement in regulation of HXT5 expression during growth on ethanol. Finally, it was shown that the PKA pathway, which is known to be involved in expression of STRE-regulated genes, was also involved in regulation of HXT5 expression. A possible mechanism by which expression of HXT5 could be regulated by the transcriptional regulatory elements in the promoter is discussed. SN - 0749-503X UR - https://www.unboundmedicine.com/medline/citation/15282798/HXT5_expression_is_under_control_of_STRE_and_HAP_elements_in_the_HXT5_promoter_ DB - PRIME DP - Unbound Medicine ER -