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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F13%3A10190506%21RIV14-MSM-11310___
rdf:type
n4:Vysledek skos:Concept
dcterms:description
Heat shock proteins 70 (Hsp70s) belong to the key molecular chaperones. They are expressed constitutively to keep the nascent protein in appropriate form before getting the native conformation or during transport to the relevant compartment. The expression of Hsp70s is induced by elevated temperature due to the capacity to refold partially denaturated or denaturated proteins. Hsp70s could also assist in elimination of damaged proteins by proteolysis using ubiquitin-proteasome system. Furthermore, other types of stress such as cold, drought, heavy metals, free radicals, and UV light are associated with synthesis of Hsp70s. A number of recently published studies show that just in condition of stress Hsp70s can acquire specific functions. For example, Hsp70s participate in photosynthesis; the chloroplastic Hsp70 is involved in protection of PS II against photoinhibition, in the assembly of new PS II complex, and de novo synthesis of D1, crucial protein of PS II. In some model systems plant-stressor expression of Hsp70 was suggested as key factor in induction of plant tolerance. Hsp70 is also involved in stabilization of metabolically important enzymes and in re-establishing of protein homeostasis. Hsp70 together with Hsp90 are involved in ABA signalling pathways, therefore can affect stomata closure. The expression of Hsp70s is regulated by heat shock factors (HSF) that function as transcription factors or through pathways that lead to up-regulation of Hsp70. Changes in the membrane fluidity, changes in Ca2+ levels cause activation of Ca2+ dependent protein kinases and MAP kinase cascades and up-regulation of HSF. Moreover, the transcription of other thermotolerance and stress responsible gene is affected by HSFs. With regard to existence of multigene family of Hsp70, high number of HSF and complex network of metabolic pathways involved in these proteins the role of individual Hsp70 in the cell under stress conditions is still interesting topic, which is worth studying Heat shock proteins 70 (Hsp70s) belong to the key molecular chaperones. They are expressed constitutively to keep the nascent protein in appropriate form before getting the native conformation or during transport to the relevant compartment. The expression of Hsp70s is induced by elevated temperature due to the capacity to refold partially denaturated or denaturated proteins. Hsp70s could also assist in elimination of damaged proteins by proteolysis using ubiquitin-proteasome system. Furthermore, other types of stress such as cold, drought, heavy metals, free radicals, and UV light are associated with synthesis of Hsp70s. A number of recently published studies show that just in condition of stress Hsp70s can acquire specific functions. For example, Hsp70s participate in photosynthesis; the chloroplastic Hsp70 is involved in protection of PS II against photoinhibition, in the assembly of new PS II complex, and de novo synthesis of D1, crucial protein of PS II. In some model systems plant-stressor expression of Hsp70 was suggested as key factor in induction of plant tolerance. Hsp70 is also involved in stabilization of metabolically important enzymes and in re-establishing of protein homeostasis. Hsp70 together with Hsp90 are involved in ABA signalling pathways, therefore can affect stomata closure. The expression of Hsp70s is regulated by heat shock factors (HSF) that function as transcription factors or through pathways that lead to up-regulation of Hsp70. Changes in the membrane fluidity, changes in Ca2+ levels cause activation of Ca2+ dependent protein kinases and MAP kinase cascades and up-regulation of HSF. Moreover, the transcription of other thermotolerance and stress responsible gene is affected by HSFs. With regard to existence of multigene family of Hsp70, high number of HSF and complex network of metabolic pathways involved in these proteins the role of individual Hsp70 in the cell under stress conditions is still interesting topic, which is worth studying
dcterms:title
Roles of Hsp70 in Plant Abiotic Stress Roles of Hsp70 in Plant Abiotic Stress
skos:prefLabel
Roles of Hsp70 in Plant Abiotic Stress Roles of Hsp70 in Plant Abiotic Stress
skos:notation
RIV/00216208:11310/13:10190506!RIV14-MSM-11310___
n4:predkladatel
n12:orjk%3A11310
n3:aktivita
n15:I
n3:aktivity
I
n3:dodaniDat
n14:2014
n3:domaciTvurceVysledku
n16:2266105 n16:2245272
n3:druhVysledku
n18:C
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
103429
n3:idVysledku
RIV/00216208:11310/13:10190506
n3:jazykVysledku
n20:eng
n3:klicovaSlova
tolerance; protein homeostasis; Hsp70; plant stress
n3:klicoveSlovo
n5:tolerance n5:Hsp70 n5:protein%20homeostasis n5:plant%20stress
n3:kontrolniKodProRIV
[DC2FABEA41B2]
n3:mistoVydani
Boca Raton, Florida, US
n3:nazevEdiceCisloSvazku
Neuveden
n3:nazevZdroje
Molecular Approaches in Plant Abiotic Stress
n3:obor
n11:CE
n3:pocetDomacichTvurcuVysledku
2
n3:pocetStranKnihy
430
n3:pocetTvurcuVysledku
2
n3:rokUplatneniVysledku
n14:2013
n3:tvurceVysledku
Ryšlavá, Helena Doubnerová, Veronika
s:numberOfPages
23
n9:hasPublisher
CRC Press (Taylor and Francis Group)
n19:isbn
978-1-4665-8893-6
n6:organizacniJednotka
11310