Document Detail

The Usf-1 transcription factor is a novel target for the stress-responsive p38 kinase and mediates UV-induced Tyrosinase expression.
MedLine Citation:
PMID:  11532965     Owner:  NLM     Status:  MEDLINE    
The stress-activated signalling cascade leading to phosphorylation of the p38 family of kinases plays a crucial role during development and in the cellular response to a wide variety of stress-inducing agents. Although alterations in gene expression characteristic of the stress response require the regulation of key transcription factors by the p38 family, few downstream targets for this signalling pathway have been identified. By examining the ability of pigment cells to respond to UV irradiation as part of the UV-induced tanning response, we show that while the microphthalmia-associated transcription factor Mitf regulates basal Tyrosinase expression, it is the ubiquitous basic helix-loop-helix-leucine zipper transcription factor Usf-1 that is required for the UV activation of the Tyrosinase promoter. Consistent with this we demonstrate that Usf-1 is phosphorylated and activated by the stress-responsive p38 kinase. The results suggest that activation of Usf-1 by p38 at a wide variety of viral and cellular promoters will provide a link between stimuli as diverse as UV irradiation, glucose, viral infection and pro-inflammatory cytokines, and the changes in gene expression associated with the stress response.
M D Galibert; S Carreira; C R Goding
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The EMBO journal     Volume:  20     ISSN:  0261-4189     ISO Abbreviation:  EMBO J.     Publication Date:  2001 Sep 
Date Detail:
Created Date:  2001-09-04     Completed Date:  2001-10-18     Revised Date:  2013-04-18    
Medline Journal Info:
Nlm Unique ID:  8208664     Medline TA:  EMBO J     Country:  England    
Other Details:
Languages:  eng     Pagination:  5022-31     Citation Subset:  IM    
Eukaryotic Transcription Laboratory, Marie Curie Research Institute, The Chart, Oxted RH8 0TL, UK.
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MeSH Terms
3T3 Cells
COS Cells
Cercopithecus aethiops
Chromatin / physiology
DNA-Binding Proteins*
Gene Expression Regulation, Enzymologic / radiation effects*
Genes, Reporter
Glutathione Transferase / genetics
Helix-Loop-Helix Motifs
Melanocytes / cytology,  metabolism,  radiation effects
Mitogen-Activated Protein Kinases / metabolism*
Monophenol Monooxygenase / genetics*
Promoter Regions, Genetic / radiation effects
Recombinant Fusion Proteins / analysis
Transcription Factors / metabolism*
Tumor Cells, Cultured
Ultraviolet Rays*
Upstream Stimulatory Factors
p38 Mitogen-Activated Protein Kinases
Reg. No./Substance:
0/Chromatin; 0/DNA-Binding Proteins; 0/Recombinant Fusion Proteins; 0/Transcription Factors; 0/USF1 protein, human; 0/Upstream Stimulatory Factors; 0/Usf1 protein, mouse; EC Monooxygenase; EC Transferase; EC Protein Kinases; EC Mitogen-Activated Protein Kinases

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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