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A proteomic atlas of the legume Medicago truncatula and its nitrogen-fixing endosymbiont Sinorhizobium meliloti
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A proteomic atlas of the legume Medicago truncatula and its nitrogen-fixing endosymbiont Sinorhizobium meliloti
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Journal Article
A proteomic atlas of the legume Medicago truncatula and its nitrogen-fixing endosymbiont Sinorhizobium meliloti
2016
Overview
A proteomic atlas of a model legume and its rhizobial symbiont provides a resource for understanding symbiotic nitrogen fixation.
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.
Publisher
Nature Publishing Group US,Nature Publishing Group
Subject
/ 82/58
/ 82/80
/ 82/81
/ Alfalfa
/ Bacteria
/ Bacterial Proteins - metabolism
/ Biomedical Engineering/Biotechnology
/ Legumes
/ Medicago truncatula - metabolism
/ Medicago truncatula - microbiology
/ Methods
/ Nitrogen Fixation - physiology
/ Nitrogen-fixing microorganisms
/ Peptides
/ resource
