Abstract
Clostridium ljungdahlii is a representative autotrophic gas-fermenting acetogen capable of converting CO2 and CO into biomass and multiple metabolites. The carbon fixation and conversion based on C. ljungdahlii have great potential for the sustainable production of bulk biochemicals and biofuels using industrial syngas and waste gases. With substantial recent advances in genetic manipulation tools, it has become possible to study and improve the metabolic capability of C. ljungdahlii in gas fermentation. The product scope of C. ljungdahlii has been expanded through the introduction of heterologous production pathways followed by the modification of native metabolic networks. In addition, progress has been made in understanding the physiological and metabolic mechanisms of this anaerobe, contributing to strain designs for expected phenotypes. In this review, we highlight the latest research progresses regarding C. ljungdahlii and discuss the next steps to comprehensively understand and engineer this bacterium for an improved bacterial gas bioconversion platform.
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