An engineered yeast strain capable of efficient fermentation of xylose to ethanol, and methods of making and using the strain, are provided

An engineered yeast strain capable of efficient fermentation of xylose to ethanol, and methods of making and using the strain, are provided

The present invention relates to novel nucleic acid sequences encoding bacterial xylose isomerases that upon transformation of a eukaryotic microbial host cell, such as yeast, to confer to the host cell the ability of isomerising xylose to xylulose. The nucleic acid sequences encode xylose isomerases that originate from bacteria such as Eubacterium sp., Clostridium cellulosi and others. The invention further relates to fermentation processes wherein the transformed host cells ferment a xylose-containing medium to produce ethanol or other fermentation products.

The present invention relates to novel nucleic acid sequences encoding bacterial xylose isomerases that upon transformation of a eukaryotic microbial host cell, such as yeast, to confer to the host cell the ability of isomerising xylose to xylulose. The nucleic acid sequences encode xylose isomerases that originate from bacteria such as Eubacterium sp., Clostridium cellulosi and others. The invention further relates to fermentation processes wherein the transformed host cells ferment a xylose-containing medium to produce ethanol or other fermentation products.

The present invention relates to a recombinant microorganism which is capable of simultaneously fermenting at least two sugars in a lignocellulosic saccharified liquid, and also capable of generating diol.

The present invention relates to a recombinant microorganism which is capable of simultaneously fermenting at least two sugars in a lignocellulosic saccharified liquid, and also capable of generating diol.

The present disclosure relates to a non-naturally occurring microorganism that includes an endogenous genetic deletion that eliminates the expression of at least a pyruvate kinase, where the genetically modified prokaryotic microorganism is capable of producing 3-deoxy-D-arabino-heptulosonate-7-phosphate.

A nanoparticle (for example, quantum dot) serves as a substrate for immobilizing enzymes involved in consecutive reactions as a cascade. This results in a significant increase in the rate of catalysis as well as final product yield compared to non-immobilized enzymes.

A nanoparticle (for example, quantum dot) serves as a substrate for immobilizing enzymes involved in consecutive reactions as a cascade. This results in a significant increase in the rate of catalysis as well as final product yield compared to non-immobilized enzymes.

The present invention provides for a Pseudomonas cell is able to grow in a medium with xylose or galactose as a sole carbon source with a growth rate of equal to or higher than 0.10 h.sup.−1. The present invention provides for methods and compositions relating to an engineered Pseudomonas putida KT2440 utilizing a non-native carbon source, such as galactose or xylose or both.