Emergent cooperation in microbial metabolism.
TL;DR: A new type of synthetic genetic interaction, synthetic mutualism in trans (SMIT), is reported, in which certain pairs of auxotrophic Escherichia coli mutants complement one another's growth by cross‐feeding essential metabolites.
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Abstract: Mixed microbial communities exhibit emergent biochemical properties not found in clonal monocultures. We report a new type of synthetic genetic interaction, synthetic mutualism in trans (SMIT), in which certain pairs of auxotrophic Escherichia coli mutants complement one another's growth by cross-feeding essential metabolites. We find significant metabolic synergy in 17% of 1035 such pairs tested, with SMIT partners identified throughout the metabolic network. Cooperative phenotypes show more growth on average by aiding the proliferation of their conjugate partner, thereby expanding the source of their own essential metabolites. We construct a quantitative, predictive, framework for describing SMIT interactions as governed by stoichiometric models of the metabolic networks of the interacting strains.
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References
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Minoru Kanehisa,Susumu Goto +1 more
TL;DR: The Kyoto Encyclopedia of Genes and Genomes (KEGG) as discussed by the authors is a knowledge base for systematic analysis of gene functions in terms of the networks of genes and molecules.
Construction of Escherichia coli K-12 in-frame, single-gene knockout mutants: the Keio collection.
Tomoya Baba,Takeshi Ara,Miki Hasegawa,Yuki Takai,Yoshiko Okumura,Miki Baba,Kirill A. Datsenko,Masaru Tomita,Barry L. Wanner,Hirotada Mori,Hirotada Mori +10 more
TL;DR: These mutants—the ‘Keio collection’—provide a new resource not only for systematic analyses of unknown gene functions and gene regulatory networks but also for genome‐wide testing of mutational effects in a common strain background, E. coli K‐12 BW25113.
Five Rules for the Evolution of Cooperation
TL;DR: Five mechanisms for the evolution of cooperation are discussed: kin selection, direct reciprocity, indirect reciprocities, network reciprocation, group selection, and group selection.
Social semantics: altruism, cooperation, mutualism, strong reciprocity and group selection.
TL;DR: The aim here is to address issues of semantic confusion that have arisen with research on the problem of cooperation, and to emphasize the need to distinguish between proximate (mechanism) and ultimate (survival value) explanations of behaviours.
A genome-scale metabolic reconstruction for Escherichia coli K-12 MG1655 that accounts for 1260 ORFs and thermodynamic information.
Adam M. Feist,Christopher S. Henry,Jennifer L. Reed,Markus Krummenacker,Andrew R. Joyce,Peter D. Karp,Linda J. Broadbelt,Vassily Hatzimanikatis,Bernhard O. Palsson +8 more
TL;DR: An updated genome‐scale reconstruction of the metabolic network in Escherichia coli K‐12 MG1655 with increased scope and computational capability is presented, expected to broaden the spectrum of both basic biology and applied systems biology studies of E. coli metabolism.
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