Antiproliferative prostaglandins activate heat shock transcription factor.
نویسندگان
چکیده
منابع مشابه
Antiproliferative prostaglandins activate heat shock transcription factor.
Treatment of human K562 erythroleukemia cells with the antiproliferative prostaglandin A1 results in the elevated transcription of two heat shock genes, HSP70 and HSP90. Parallel with increased heat shock gene transcription is the activation of heat shock transcription factor. Heat shock transcription factor levels are induced within 60 min after prostaglandin A1 addition to levels similar to t...
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The activity of the Arabidopsis heat shock transcription factor (HSF) is repressed at normal conditions but activated by cellular stresses. Circumstantial evidence suggests that HSP70 may function as a negative feedback regulator of HSF activity. Here the interaction between HSF and HSP70 is reported using electrophoretic mobility shift and yeast two-hybrid assays. Subdomain mapping indicates a...
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The heat shock transcription factor Hsf1 of the yeast Saccharomyces cerevisiae regulates expression of genes encoding heat shock proteins and a variety of other proteins as well. To better understand the cellular roles of Hsf1, we screened multicopy suppressor genes of a temperature-sensitive hsf1 mutation. The RIM15 gene, encoding a protein kinase that is negatively regulated by the cyclic AMP...
متن کاملThe yeast and mammalian Ras pathways control transcription of heat shock genes independently of heat shock transcription factor.
Yeast strains in which the Ras-cyclic AMP (cAMP) pathway is constitutively active are sensitive to heat shock, whereas mutants in which the activity of this pathway is low are hyperresistant to heat shock. To determine the molecular basis for these differences, we examined the transcriptional induction of heat shock genes in various yeast strains. Activation of heat shock genes was attenuated i...
متن کاملComplex regulation of the yeast heat shock transcription factor.
The yeast heat shock transcription factor (HSF) is regulated by posttranslational modification. Heat and superoxide can induce the conformational change associated with the heat shock response. Interaction between HSF and the chaperone hsp70 is also thought to play a role in HSF regulation. Here, we show that the Ssb1/2p member of the hsp70 family can form a stable, ATP-sensitive complex with H...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1992
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.89.14.6227