TAP Family: HSF
Wu (1995): Organisms respond to elevated temperatures and to chemical and physiological stresses by an increase in the synthesis of heat shock proteins. The regulation of heat shock gene expression in eukaryotes is mediated by the conserved heat shock transcription factor (HSF). HSF is present in a latent state under normal conditions; it is activated upon heat stress by induction of trimerization and high-affinity binding to DNA and by exposure of domains for transcriptional activity. Analysis of HSF cDNA clones from many species has defined structural and regulatory regions responsible for the inducible activities. The heat stress signal is thought to be transduced to HSF by changes in the physical environment, in the activity of HSF-modifying enzymes, or by changes in the intracellular level of heat shock proteins.
References:
Baniwal, SK; Bharti, K; Chan, KY; Fauth, M; Ganguli, A; Kotak, S; Mishra, SK; Nover, L; Port, M; Scharf, KD; Tripp, J; Weber, C; Zielinski, D; von Koskull-Döring, P. 2004. Heat stress response in plants: a complex game with chaperones and more than twenty heat stress transcription factors. J. Biosci. 29(4):471-87
Fujita, A; Kikuchi, Y; Kuhara, S; Misumi, Y; Matsumoto, S; Kobayashi, H. 1989. Domains of the SFL1 protein of yeasts are homologous to Myc oncoproteins or yeast heat-shock transcription factor. Gene 85(2):321-8"
Nover, L; Scharf, KD; Gagliardi, D; Vergne, P; Czarnecka-Verner, E; Gurley, WB. 1996. The Hsf world: classification and properties of plant heat stress transcription factors. Cell Stress Chaperones 1(4):215-23"
Wu, C. 1995. Heat shock transcription factors: structure and regulation. Annu. Rev. Cell Dev. Biol. 11:441-69"
