Publication details

Interactions of the receiver domain in histidine kinase receptors with the AHP proteins



Year of publication 2009
Type Conference abstract
MU Faculty or unit

Faculty of Science

Description Two-component systems belong to important sensing / response mechanisms in higher plants. AHP proteins interact with histidine kinase receptors as well as with response regulators, and therefore link the signal recognition by membrane sensors with regulation of transcription via nuclear-located transcription factors that mediate plant responses to the environmental stimuli. In our study the interactions of CKI1 receiver domain with all six AHP proteins were analyzed in vivo. Using the yeast two-hybrid system we revealed that CKI1 receiver domain interacts with AHP2, AHP3 and AHP5, but not with AHP1, AHP4 and AHP6. In addition, bimolecular fluorescence complementation analysis (BiFC) was carried out in transiently transformed tobacco leaves and the interaction pattern was confirmed. Combining these two methods for analysis of protein-protein interactions in vivo we gained a rapid insight into the specificity of elements involved in a signalling cascade downstream of CKI1
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