Roślinne czynniki szoku cieplnego

• Authors: Karol Stawski , Anna Goc

Title variants

EN

Plant heat stress factors.

• Languages of publication: PL EN

Abstracts

PL

Transkrypcyjne czynniki szoku cieplnego (Hsf) są niezbędne dla wszystkich organizmów eukariotycznych do przetrwania w warunkach silnego stresu. Są odpowiedzialne za transkrypcyjną regulację genów kodujących białka chaperonowe oraz inne białka powiązane ze stresem. W porównaniu do czterech Hsf kręgowców, roślinne Hsf są bardzo liczne i mogą mieć nawet 25 członków. Wykazują one wysoki stopień specjalizacji w stosunku do rodzaju stresu jak również różnych programów rozwojowych. Pomimo pewnych wysoce zachowywanych cech, różnice w strukturze roślinnych Hsf pozwoliły na wyróżnieni trzech podstawowych klas (klasa A, B i C). W przeciwieństwie do aktywatorowej klasy A, klasy C i B o porównywalnej liczbie członków nie posiadają oczywistej funkcji. U roślin transkrypcyjna regulacja genów zależnych od Hsf jest kontrolowana przez pośrednią lub bezpośrednią kooperację pomiędzy różnymi czynnikami Hsf, jak również w wyniku interakcji z białkami czperonowymi. Wciąż jednak sieć wzajemnych zależności pomiędzy poszczególnymi Hsf jest mało zrozumiała. Z całą pewność Hsf funkcjonują jako część składowa szlaków transdukcji sygnałów aktywowanych w stresie środowiskowym jak i w trakcie rozwoju.

EN

Heat shock factors (Hsf) are essential for all eukaryotic organisms to survive under exposures to acute stress. They are transcriptional regulators of genes encoding molecular chaperones and other stress proteins. Compared with other eukaryotes, e.g. vertebrates with 4 members of the Hsf family, the plant Hsf family shows a large multiplicity, with more than 20 members. The plant Hsf family shows a strong diversification of expression pattern not only in response to stress, but also during various developmental programs. Despite many conserved features plant Hsf are allocated based on structural characteristics into three major classes (class A, B and C). In contrast to class A, a considerable number of Hsf assigned to classes B and C heave no evident function as transcription activators. Transcriptional regulation of Hsf dependent genes in plants is controlled by direct and indirect cooperation between distinct Hsf members and by interaction with chaperones. However our understanding of the function of plant Hsf network is far from complete. Certainly, they can functions as part of different signal transduction pathways operating in response to environmental stress and during development.

• Journal: Kosmos
• Year: 2012
• Volume: 61
• Issue: 4
• Pages: 625-634

Dates

published

2012

Contributors

author

Karol Stawski

• Zakład Genetyki Wydział Biologii i Ochrony Środowiska Uniwersytet Mikołaja Kopernika Lwowska 1, 87-100 Toruń, Polska

author

Anna Goc

• Zakład Genetyki Wydział Biologii i Ochrony Środowiska Uniwersytet Mikołaja Kopernika Lwowska 1, 87-100 Toruń, Polska

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