@misc{Czarnecka-Verner_Eva_Arabidopsis_2002, author={Czarnecka-Verner, Eva and Gurley, William B.}, volume={58}, number={3}, copyright={Creative Commons Attribution BY-SA 4.0 license}, journal={Biotechnologia, vol.58, 3 (2002)-.}, howpublished={online}, year={2002}, publisher={Committee on Biotechnology PAS}, publisher={Institute of Bioorganic Chemistry PAS}, language={eng}, abstract={A plethora of heat shock transcription factors (HSFs) has been obtainedfrom various plant species (33,45-48,50,51). The Arabidopsis genome sequencingproject provided confirmation of the existence of at least twenty one HSFswhich were classified into three major classes. A, B and C, and numerous subclasses (9). Members of HSF class A displayed differential transcriptional activities in tobacco protoplasts that varied from 15- to 50-fold above the controllevel. This diversity of activity levels may reflect HSF variations regarding theirtranscriptional activation functions- some of the members might be the majorheat inducible HSFs (class A1 HSFs), while others act in an auxiliary capacity asHSF activity boosters (38). Two new class B HSFs showed no transcriptional activation potential. Reporter activities due to endogenous tobacco HSFs were inhibited by a class B HSFs showing high expression levels. This suppression ofendogenous HSFs by class B members provides further evidence that class BHSFs are not transcriptional activators, but are able to trons-attenuate thetranscriptional activity of bona fide activator HSFs (34,41). The transcriptionalcompetency of class C HSFs has not been determined.}, type={Text}, title={Arabidopsis Class A and B HSFs Show a Spectrum of Transcriptional Activity}, URL={http://rcin.org.pl/Content/137866/PDF/POZN271_172992_biotechnologia-2002-no3-verner.pdf}, keywords={biotechnology}, }