Proteomic analysis of chromoplasts from six crop species reveals insights into chromoplast function and development
文献类型: 外文期刊
第一作者: Wang, Yong-Qiang
作者: Wang, Yong-Qiang;Yuan, Hui;Mazourek, Michael;Li, Li;Yang, Yong;Fei, Zhangjun;Fish, Tara;Thannhauser, Theodore W.;Kochian, Leon V.;Li, Li;Fei, Zhangjun;Wang, Xiaowu
作者机构:
关键词: Carrot;cauliflower;chromoplast;papaya;pepper;proteomics;tomato;watermelon
期刊名称:JOURNAL OF EXPERIMENTAL BOTANY ( 影响因子:6.992; 五年影响因子:7.86 )
ISSN: 0022-0957
年卷期: 2013 年 64 卷 4 期
页码:
收录情况: SCI
摘要: Chromoplasts are unique plastids that accumulate massive amounts of carotenoids. To gain a general and comparative characterization of chromoplast proteins, this study performed proteomic analysis of chromoplasts from six carotenoid-rich crops: watermelon, tomato, carrot, orange cauliflower, red papaya, and red bell pepper. Stromal and membrane proteins of chromoplasts were separated by 1D gel electrophoresis and analysed using nLC-MS/MS. A total of 9532262 proteins from chromoplasts of different crop species were identified. Approximately 60% of the identified proteins were predicted to be plastid localized. Functional classification using MapMan bins revealed large numbers of proteins involved in protein metabolism, transport, amino acid metabolism, lipid metabolism, and redox in chromoplasts from all six species. Seventeen core carotenoid metabolic enzymes were identified. Phytoene synthase, phytoene desaturase, ?-carotene desaturase, 9-cis-epoxycarotenoid dioxygenase, and carotenoid cleavage dioxygenase 1 were found in almost all crops, suggesting relative abundance of them among the carotenoid pathway enzymes. Chromoplasts from different crops contained abundant amounts of ATP synthase and adenine nucleotide translocator, which indicates an important role of ATP production and transport in chromoplast development. Distinctive abundant proteins were observed in chromoplast from different crops, including capsanthin/capsorubin synthase and fibrillins in pepper, superoxide dismutase in watermelon, carrot, and cauliflower, and glutathione-S-transferease in papaya. The comparative analysis of chromoplast proteins among six crop species offers new insights into the general metabolism and function of chromoplasts as well as the uniqueness of chromoplasts in specific crop species. This work provides reference datasets for future experimental study of chromoplast biogenesis, development, and regulation in plants.
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