CML10, a variant of calmodulin, modulates ascorbic acid synthesis
- Authors
- Cho, Kwang-Moon; Ha Thi Kim Nguyen; Kim, Soo Youn; Shin, Jin Seok; Cho, Dong Hwa; Hong, Seung Beom; Shin, Jeong Sheop; Ok, Sung Han
- Issue Date
- 1월-2016
- Publisher
- WILEY
- Keywords
- abiotic stress; Arabidopsis thaliana; ascorbic acid (AsA); calcium signaling; calmodulin (CaM); calmodulin-like (CML); phosphomannomutase (PMM)
- Citation
- NEW PHYTOLOGIST, v.209, no.2, pp.664 - 678
- Indexed
- SCIE
SCOPUS
- Journal Title
- NEW PHYTOLOGIST
- Volume
- 209
- Number
- 2
- Start Page
- 664
- End Page
- 678
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/89890
- DOI
- 10.1111/nph.13612
- ISSN
- 0028-646X
- Abstract
- Calmodulins (CaMs) regulate numerous Ca2+-mediated cellular processes in plants by interacting with their respective downstream effectors. Due to the limited number of CaMs, other calcium sensors modulate the regulation of Ca2+-mediated cellular processes that are not managed by CaMs. Of 50 CaM-like (CML) proteins identified in Arabidopsis thaliana, we characterized the function of CML10. Yeast two-hybrid screening revealed phosphomannomutase (PMM) as a putative interaction partner of CML10. In vitro and in vivo interaction assays were performed to analyze the interaction mechanisms of CML10 and PMM. PMM activity and the phenotypes of cml10 knock-down mutants were studied to elucidate the role(s) of the CML10-PMM interaction. PMM interacted specifically with CML10 in the presence of Ca2+ through its multiple interaction motifs. This interaction promoted the activity of PMM. The phenotypes of cml10 knock-down mutants were more sensitive to stress conditions than wild-type plants, corresponding with the fact that PMM is an enzyme which modulates the biosynthesis of ascorbic acid, an antioxidant. The results of this research demonstrate that a calcium sensor, CML10, which is an evolutionary variant of CaM, modulates the stress responses in Arabidopsis by regulating ascorbic acid production.
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Collections - College of Life Sciences and Biotechnology > Division of Life Sciences > 1. Journal Articles
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