Abstract
Abstract The biogenesis and assembly of photosynthetic multisubunit protein complexes is assisted by a series of nucleus-encoded auxiliary protein factors. In this study, we characterize the dac mutant of Arabidopsis (Arabidopsis thaliana), which shows a severe defect in the accumulation of the cytochrome b 6/f complex, and provide evidence suggesting that the efficiency of cytochrome b 6/f complex assembly is affected in the mutant. DAC is a thylakoid membrane protein with two predicted transmembrane domains that is conserved from cyanobacteria to vascular plants. Yeast (Saccharomyces cerevisiae) two-hybrid and coimmunoprecipitation analyses revealed a specific interaction between DAC and PetD, a subunit of the cytochrome b 6/f complex. However, DAC was found not to be an intrinsic component of the cytochrome b 6/f complex. In vivo chloroplast protein labeling experiments showed that the labeling rates of the PetD and cytochrome f proteins were greatly reduced, whereas that of the cytochrome b 6 protein remained normal in the dac mutant. DAC appears to be a novel factor involved in the assembly/stabilization of the cytochrome b 6/f complex, possibly through interaction with the PetD protein.
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Dates
Type | When |
---|---|
Created | 12 years, 10 months ago (Oct. 5, 2012, 11:07 p.m.) |
Deposited | 4 years, 4 months ago (April 19, 2021, 10:18 p.m.) |
Indexed | 1 month ago (July 19, 2025, 11:24 p.m.) |
Issued | 12 years, 10 months ago (Oct. 5, 2012) |
Published | 12 years, 10 months ago (Oct. 5, 2012) |
Published Online | 12 years, 10 months ago (Oct. 5, 2012) |
Published Print | 12 years, 8 months ago (Dec. 5, 2012) |
@article{Xiao_2012, title={DAC Is Involved in the Accumulation of the Cytochrome b 6/f Complex in Arabidopsis }, volume={160}, ISSN={1532-2548}, url={http://dx.doi.org/10.1104/pp.112.204891}, DOI={10.1104/pp.112.204891}, number={4}, journal={Plant Physiology}, publisher={Oxford University Press (OUP)}, author={Xiao, Jianwei and Li, Jing and Ouyang, Min and Yun, Tao and He, Baoye and Ji, Daili and Ma, Jinfang and Chi, Wei and Lu, Congming and Zhang, Lixin}, year={2012}, month=oct, pages={1911–1922} }