Lignocellulose-derived fuels and chemicals are vital to breaking the world's dependence on fossil fuels.Though plant biomass is notoriously resistant to deconstruction,lignocellulolytic thermophiles are especially...Lignocellulose-derived fuels and chemicals are vital to breaking the world's dependence on fossil fuels.Though plant biomass is notoriously resistant to deconstruction,lignocellulolytic thermophiles are especially adept at degrading its constituent polysaccharides into mono-and oligo-saccharides for catabolism.And many thermo-philes,whether lignocellulolytic or not,can be engineered to ferment lignocellulose-derived sugars into valuable fuels and chemicals as part of consolidated bioprocesses.Although the past twenty years have seen major ad-vances in the genetic and metabolic engineering of individual thermophiles,the strategy of co-culturing ther-mophilic strains as part of synthetic communities has not been well established.Synthetic communities unlock synergistic interactions that outperform monocultures,thereby enhancing product titers,rates,and yields.While limited genetic tools once hindered the development of synthetic thermophilic communities,recent advances now offer robust systems for engineering these industrially relevant organisms.Here,we propose that this expanded genetic malleability enables engineering of 1)transport specialization to reduce substrate competition between strains and 2)division of labor strategies whereby one strain focuses on lignocellulose deconstruction while another strain dedicates metabolic burden for product synthesis.We draw on examples of engineered thermo-philes like Clostridium thermocellum,Thermoanaerobacter saccharolyticum,and Anaerocellum bescii to illustrate how these mechanisms have been applied in thermophilic co-cultures.In brief,this perspective outlines design prin-ciples to construct effective thermophilic communities for lignocellulose bioprocessing.展开更多
基金supported by the High Meadows Environmental Institute at Princeton University through the generous support of the William Clay Ford,Jr'79 and Lisa Vanderzee Ford'82 Graduate Fellowship Fund to H.T.by a Roberto Rocca Graduate Fellowship from Techint Group to H.T.,and a grant from the Energy Research Fund administered by the Andlinger Center for Energy and the Environment at Princeton University to J.M.C.
文摘Lignocellulose-derived fuels and chemicals are vital to breaking the world's dependence on fossil fuels.Though plant biomass is notoriously resistant to deconstruction,lignocellulolytic thermophiles are especially adept at degrading its constituent polysaccharides into mono-and oligo-saccharides for catabolism.And many thermo-philes,whether lignocellulolytic or not,can be engineered to ferment lignocellulose-derived sugars into valuable fuels and chemicals as part of consolidated bioprocesses.Although the past twenty years have seen major ad-vances in the genetic and metabolic engineering of individual thermophiles,the strategy of co-culturing ther-mophilic strains as part of synthetic communities has not been well established.Synthetic communities unlock synergistic interactions that outperform monocultures,thereby enhancing product titers,rates,and yields.While limited genetic tools once hindered the development of synthetic thermophilic communities,recent advances now offer robust systems for engineering these industrially relevant organisms.Here,we propose that this expanded genetic malleability enables engineering of 1)transport specialization to reduce substrate competition between strains and 2)division of labor strategies whereby one strain focuses on lignocellulose deconstruction while another strain dedicates metabolic burden for product synthesis.We draw on examples of engineered thermo-philes like Clostridium thermocellum,Thermoanaerobacter saccharolyticum,and Anaerocellum bescii to illustrate how these mechanisms have been applied in thermophilic co-cultures.In brief,this perspective outlines design prin-ciples to construct effective thermophilic communities for lignocellulose bioprocessing.
