HSP70 and heat shock factor 1 cooperate to repress Ras-induced transcriptional activation of the c-fos gene
AUTOR(ES)
He, Haiying
FONTE
Cell Stress Society International
RESUMO
Heat shock protein 70 (HSP70) is a molecular chaperone involved in protein folding and resistance to the deleterious effects of stress. Here we show that HSP70 suppresses transcription of c-fos, an early response gene that is a key component of the ubiquitous AP-1 transcription factor complex. HSP70 repressed Ras-induced c-fos transcription only in the presence of functional heat shock factor1 (HSF1). This suggests that HSP70 functions as a corepressor with HSF1 to inhibit c-fos gene transcription. Therefore, besides its known function in the stress response, HSP70 also has the property of a corepressor and combines with HSF1 to antagonize Fos expression and may thus impact multiple aspects of cell regulation.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=312869Documentos Relacionados
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