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The Phosphorylation of the Heat Shock Factor as a Modulator for the Heat Shock Response

Eugen Czeizler, Vladimir Rogojin, Ion Petre, The Phosphorylation of the Heat Shock Factor as a Modulator for the Heat Shock Response. TUCS Technical Reports 1041, Turku Centre for Computer Science, 2012.

Abstract:

The heat shock response is a well conserved defence mechanism against the accumulation of misfolded proteins due to prolonged elevated heat. The cell responds to heat shock by raising the levels of heat shock proteins hsp, which are responsible for chaperoning protein refolding. The synthesis of hsp is highly regulated at the transcription level by specific heat shock (transcription) factors (hsf). One of the regulation mechanisms is the phosphorylation of hsf's. Experimental evidence shows a connection between the hyperphosphorylation of hsf's and the transactivation of the hsp-encoding genes. In this paper we incorporate several (de)phosphorylation pathways into an existing well validated computational model of the heat shock response. We analyze the quantitative control of each of these pathways over the entire process. For each of these pathways we create detailed computational models which we subject to parameter estimation in order to fit them to existing experimental data. In particular, we find conclusive evidence supporting only one of the analyzed pathways. Also, we corroborate our results with a set of computational models of a more reduced size.

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BibTeX entry:

@TECHREPORT{tCzRoPe12a,
  title = {The Phosphorylation of the Heat Shock Factor as a Modulator for the Heat Shock Response},
  author = {Czeizler, Eugen and Rogojin, Vladimir and Petre, Ion},
  number = {1041},
  series = {TUCS Technical Reports},
  publisher = {Turku Centre for Computer Science},
  year = {2012},
}

Belongs to TUCS Research Unit(s): Computational Biomodeling Laboratory (Combio Lab)

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