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Genomic analysis reveals key aspects of prokaryotic symbiosis in the phototrophic consortium “Chlorochromatium aggregatum”
Liu,Zhenfeng1,7; Müller,Johannes2; Li,Tao1,8; Alvey,Richard M1,9; Vogl,Kajetan1; Frigaard,Niels-Ulrik3; Rockwell,Nathan C4; Boyd,Eric S5; Tomsho,Lynn P1; Schuster,Stephan C1; Henke,Petra2; Rohde,Manfred6; Overmann,J?rg2; Bryant,Donald A1,5
Corresponding AuthorBryant,Donald A(dab14@psu.edu)
2013-11-22
Source PublicationGenome Biology
ISSN1474-760X
Volume14Issue:11
AbstractAbstractBackground‘Chlorochromatium aggregatum’ is a phototrophic consortium, a symbiosis that may represent the highest degree of mutual interdependence between two unrelated bacteria not associated with a eukaryotic host. ‘Chlorochromatium aggregatum’ is a motile, barrel-shaped aggregate formed from a single cell of ‘Candidatus Symbiobacter mobilis”, a polarly flagellated, non-pigmented, heterotrophic bacterium, which is surrounded by approximately 15 epibiont cells of Chlorobium chlorochromatii, a non-motile photolithoautotrophic green sulfur bacterium.ResultsWe analyzed the complete genome sequences of both organisms to understand the basis for this symbiosis. Chl. chlorochromatii has acquired relatively few symbiosis-specific genes; most acquired genes are predicted to modify the cell wall or function in cell-cell adhesion. In striking contrast, ‘Ca. S. mobilis’ appears to have undergone massive gene loss, is probably no longer capable of independent growth, and thus may only reproduce when consortia divide. A detailed model for the energetic and metabolic bases of the dependency of ‘Ca. S. mobilis’ on Chl. chlorochromatii is described.ConclusionsGenomic analyses suggest that three types of interactions lead to a highly sophisticated relationship between these two organisms. Firstly, extensive metabolic exchange, involving carbon, nitrogen, and sulfur sources as well as vitamins, occurs from the epibiont to the central bacterium. Secondly, ‘Ca. S. mobilis’ can sense and move towards light and sulfide, resources that only directly benefit the epibiont. Thirdly, electron cycling mechanisms, particularly those mediated by quinones and potentially involving shared protonmotive force, could provide an important basis for energy exchange in this and other symbiotic relationships.
DOI10.1186/gb-2013-14-11-r127
Language英语
WOS IDBMC:10.1186/gb-2013-14-11-r127
PublisherBioMed Central
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/28553
Collection水生生物分子与细胞生物学研究中心_期刊论文
Corresponding AuthorBryant,Donald A
Affiliation1.The Pennsylvania State University; Department of Biochemistry and Molecular Biology
2.Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH
3.University of Copenhagen; Section for Marine Biology, Department of Biology
4.University of California; Department of Molecular and Cellular Biology
5.Montana State University; Department of Microbiology
6.Helmholtz-Zentrum für Infektionsforschung
7.University of Southern California; Department of Biological Sciences
8.Institute of Hydrobiology, Chinese Academy of Sciences; Algal Genomics Research Group
9.Chaminade University; Department of Biology
Recommended Citation
GB/T 7714
Liu,Zhenfeng,Müller,Johannes,Li,Tao,等. Genomic analysis reveals key aspects of prokaryotic symbiosis in the phototrophic consortium “Chlorochromatium aggregatum”[J]. Genome Biology,2013,14(11).
APA Liu,Zhenfeng.,Müller,Johannes.,Li,Tao.,Alvey,Richard M.,Vogl,Kajetan.,...&Bryant,Donald A.(2013).Genomic analysis reveals key aspects of prokaryotic symbiosis in the phototrophic consortium “Chlorochromatium aggregatum”.Genome Biology,14(11).
MLA Liu,Zhenfeng,et al."Genomic analysis reveals key aspects of prokaryotic symbiosis in the phototrophic consortium “Chlorochromatium aggregatum”".Genome Biology 14.11(2013).
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