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Journal of Experimental Botany, Vol. 53, No. 367, pp. 371-375, February 1, 2002
© 2002 Oxford University Press

Short Communication

Interaction between Arabidopsis heat shock transcription factor 1 and 70 kDa heat shock proteins

Byung-Hoon Kim1 and Fritz Schöffl2

Universität Tübingen, ZMBP–Zentrum für Molekularbiologie der Pflanzen, Allgemeine Genetik, Auf der Morgenstelle 28, D-72076 Tübingen, Germany

Abstract

The activity of the Arabidopsis heat shock transcription factor (HSF) is repressed at normal conditions but activated by cellular stresses. Circumstantial evidence suggests that HSP70 may function as a negative feedback regulator of HSF activity. Here the interaction between HSF and HSP70 is reported using electrophoretic mobility shift and yeast two-hybrid assays. Subdomain mapping indicates an interaction of the activation domain and DNA-binding domain of HSF1 with HSP70.

Key words: Arabidopsis HSF, HSP70, yeast two-hybrid, electrophoretic mobility shift.


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