截形苜蓿
草木犀根瘤菌
根瘤菌
中华根瘤菌属
生物
固氮
共生
莲藕
根瘤
苜蓿
根瘤菌
豆类
莲花
植物
细菌
生物化学
基因
遗传学
作者
Harald Marx,Catherine E. Minogue,Dhileepkumar Jayaraman,Alicia Richards,Nicholas W. Kwiecien,Alireza Fotuhi Siahpirani,Shanmugam Rajasekar,Jun Maeda,Kevin Garcia,Angel R. Del Valle-Echevarria,Jeremy D. Volkening,Michael S. Westphall,Sushmita Roy,Michael R. Sussman,Jean‐Michel Ané,Joshua J. Coon
摘要
Legumes are essential components of agricultural systems because they enrich the soil in nitrogen and require little environmentally deleterious fertilizers. A complex symbiotic association between legumes and nitrogen-fixing soil bacteria called rhizobia culminates in the development of root nodules, where rhizobia fix atmospheric nitrogen and transfer it to their plant host. Here we describe a quantitative proteomic atlas of the model legume Medicago truncatula and its rhizobial symbiont Sinorhizobium meliloti, which includes more than 23,000 proteins, 20,000 phosphorylation sites, and 700 lysine acetylation sites. Our analysis provides insight into mechanisms regulating symbiosis. We identify a calmodulin-binding protein as a key regulator in the host and assign putative roles and targets to host factors (bioactive peptides) that control gene expression in the symbiont. Further mining of this proteomic resource may enable engineering of crops and their microbial partners to increase agricultural productivity and sustainability.
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