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Volume 149, Issue 7

Different roles for the stress-activated protein kinase pathway in the regulation of trehalose metabolism in Free

Abstract

The Wis1p-Sty1p mitogen-activated protein kinase cascade is a major signalling system in the fission yeast for a wide range of stress responses. It is known that trehalose functions as a protective metabolite to counteract deleterious effects of environmental stresses. Herein it is reported that the expression of genes related to trehalose metabolism in , (neutral trehalase) and [trehalose-6-phosphate (T6P) synthase], is partially regulated by the Sty1p kinase under salt-induced osmotic stress and conditions of slight oxidative stress and is fully dependent on this kinase under severe oxidative stress. This control is carried out through transcription factors Atf1p/Pcr1p during osmotic stress and through Pap1p during exposure to low levels of oxidative stress. However, all three transcription factors are needed for gene expression under conditions of extreme oxidative stress. In addition, a role for Sty1p in the modulation of post-transcriptional activation of trehalase mediated by Pka1p/Sck1p kinases, as well as in the activity of T6P synthase under such stressful conditions has been demonstrated. These results reveal a novel dual action of the Wis1p-Sty1p pathway in the regulation of trehalose metabolism in fission yeast.

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Keyword(s): CRE, cAMP response , MAPK, mitogen-activated protein kinase , Pka1p, protein kinase A , SAPK, stress-activated protein kinase , Sck1p, suppressor of loss of cAMP-dependent protein kinase and T6P, trehalose 6-phosphate
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2003-07-01
2024-05-01
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Different roles for the stress-activated protein kinase pathway in the regulation of trehalose metabolism in Schizosaccharomyces pombe
Microbiology 149, 1745 (2003); https://doi.org/10.1099/mic.0.26279-0
/content/journal/micro/10.1099/mic.0.26279-0
/content/journal/micro/10.1099/mic.0.26279-0
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