The phosphorylation of the heat shock factor as a modulator for the heat shock response (bibtex)
by Czeizler, Eugen, Rogojin, Vladimir and Petre, Ion
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 phos\-pho\-ry\-lation of $\hsf$'s. Experimental evidence shows a connection between the hyper-phos\-pho\-ry\-lation of $\hsf$'s and the transactivation of the $\hsp$-encoding genes. In this paper we incorporate several (de)phos\-pho\-ry\-lation 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.
Reference:
The phosphorylation of the heat shock factor as a modulator for the heat shock response (Czeizler, Eugen, Rogojin, Vladimir and Petre, Ion), In IEEE/ACM Transactions on Computational Biology and Bioinformatics, IEEE/ACM, volume 9, 2012.
Bibtex Entry:
@Article{j671,
author    = {Czeizler, Eugen AND Rogojin, Vladimir AND Petre, Ion},
title     = {The phosphorylation of the heat shock factor as a modulator for the heat shock response},
journal   = {IEEE/ACM Transactions on Computational Biology and Bioinformatics},
year      = {2012},
volume    = {9},
number    = {5},
pages     = {1326-1337},
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 phos\-pho\-ry\-lation of $\hsf$'s. Experimental evidence shows a connection between the hyper-phos\-pho\-ry\-lation of $\hsf$'s and the transactivation of the $\hsp$-encoding genes. In this paper we incorporate several (de)phos\-pho\-ry\-lation 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. },
keywords  = {Modeling, heat shock response, protein phosphorylation, pathway identification},
pdf       = {pdfs/TCBB paper v6_2012-04-13-15-16.pdf},
publisher = {IEEE/ACM},
}