期刊
JOURNAL OF BIOLOGICAL RHYTHMS
卷 26, 期 2, 页码 91-98出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/0748730410397465
关键词
Arabidopsis; evening element; temperature compensation; SPR; DNA binding; circadian transcription factor; LHY/CCA1; molecular crowding; CK2
资金
- BBSRC
- EPSRC [D019621]
- BBSRC [BB/D019621/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/D019621/1] Funding Source: researchfish
To refine mathematical models of the transcriptional/translational feedback loop in the clockwork of Arabidopsis thaliana, the investigators sought to determine the affinity of the transcription factors LHY, CCA1, and CHE for their cognate DNA target sequences in vitro. Steady-state dissociation constants were observed to lie in the low nanomolar range. Furthermore, the data suggest that the LHY/CCA1 heterodimer binds more tightly than either homodimer and that DNA binding of these complexes is temperature compensated. Finally, it was found that LHY binding to the evening element in vitro is enhanced by both molecular crowding effects and by casein kinase 2-mediated phosphorylation.
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