| CCA1 alternative splicing as a way of linking the circadian clock to temperature response in Arabidopsis. | |
| | |
MedLine Citation:
|
PMID: 22899064 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Most living organisms on the earth have the circadian clock to synchronize their biochemical processes and physiological activities with environmental changes to optimize their propagation and survival. CIRCADIAN CLOCK-ASSOCIATED1 (CCA1) is one of the core clock components in Arabidopsis. Notably, it is also associated with cold acclimation. However, it is largely unknown how CCA1 activity is modulated by low temperatures. We found that the CCA1 activity is self-regulated by a splice variant CCA1β and the CCA1β production is modulated by low temperatures, linking the circadian clock with cold acclimation. CCA1β competitively inhibits the activities of functional CCA1α and LATE ELONGATED HYPOCOTYL (LHY) transcription factors by forming nonfunctional CCA1α-CCA1β and LHY-CCA1β heterodimers. Consequently, CCA1β-overexpressing plants (35S:CCA1β) exhibit shortened circadian periods as observed in cca1 lhy double mutants. In addition, elongated hypocotyls and petioles and delayed flowering of CCA1α-overexpressing plants (35S:CCA1α) were rescued by coexpression of CCA1β. Interestingly, low temperatures suppress CCA1 alternative splicing and thus derepress the CCA1α activity in inducing cold tolerance. These observations indicate that a cold-responsive self-regulatory circuit of CCA1 plays a role in plant responses to low temperatures. |
| | |
Authors:
|
Mi-Jeong Park; Pil Joon Seo; Chung-Mo Park |
Related Documents
:
|
22917934 - The effect of procyanidine crosslinking on the properties of the electrospun gelatin me... 22905204 - Phlash: a new genetically encoded and ratiometric luminescence sensor of intracellular ph. 22647344 - Micelle to vesicle transitions of n-dodecyl-1, ω-diaminoalkanes: effects of ph, temper... 22280374 - Molecular dynamics simulations reveal specific interactions of post-translational palmi... 15544964 - Adenosine as a signal for ion channel arrest in anoxia-tolerant organisms. 2622904 - Salt or ion bridges in biological systems: a study employing quantum and molecular mech... |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2012-9-01 |
Journal Detail:
|
Title: Plant signaling & behavior Volume: 7 ISSN: 1559-2324 ISO Abbreviation: Plant Signal Behav Publication Date: 2012 Sep |
Date Detail:
|
Created Date: 2012-8-17 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 101291431 Medline TA: Plant Signal Behav Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
Department of Chemistry; Seoul National University; Seoul, Korea. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Eat in or take away? How phosphatidylinositol 4-kinases feed the phospholipase C pathway with substr...
Next Document: RNA decoys: An emerging component of plant regulatory networks?