6533b824fe1ef96bd1280a8c
RESEARCH PRODUCT
Sea urchin HSF activity in vitro and in transgenic embryos.
Giovanni SpinelliGiovanni GiudiceD. CascinoGabriella SconzoRosalia SirchiaRaffaella MelfiFabiana Geracisubject
Embryo NonmammalianHot TemperatureSea UrchinTranscription FactorTransgeneRecombinant Fusion ProteinsMolecular Sequence DataBiophysicsTransfectionBiochemistryAnimals Genetically ModifiedTranscription (biology)Genes Reporterbiology.animalHeat shock proteinAnimalsHSP70 Heat-Shock ProteinsCell NucleuPromoter Regions GeneticMolecular BiologySea urchinTranscription factorHeat-Shock ProteinsCell NucleusHSP70 Heat-Shock ProteinReporter genebiologyBase SequenceAnimalTemperatureHeat-Shock ProteinPromoterCell BiologyGastrulabeta-GalactosidaseMolecular biologyCell biologyHsp70BiophysicSea UrchinsRecombinant Fusion ProteinTranscription Factorsdescription
Evidence is provided for the presence at the physiological temperature of 20 degrees C of a heat shock transcriptor factor, HSF, in the nuclei of P.lividus embryos. This HSF is able to specifically bind in vitro the heat shock element, HSE, of the promoter of the hsp70 gene i.v., as suggested by DNA-protein binding reactions and DNAse I protection assays. Upon heat-shock, at the temperature of 31 degrees C, its ability to bind the HSE units becomes much higher. The HSF activated by heat-shock drives in vivo the transcription of the beta-galactosidase reporter gene in transgenic sea urchin gastrulae. An ATF-like transcription factor, widely described in other organisms but not at all in sea urchins, is also present in the nuclear extracts and is able to bind the consensus individuated in the hsp70 i.v. gene promoter.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-12-06 | Biochemical and biophysical research communications |