摘要:
The present disclosure relates to host cells containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports cellodextrin into the cell. The present disclosure further relates to methods of increasing transport of cellodextrin into a cell, methods of increasing growth of a cell on a medium containing cellodextrin, methods of co-fermenting cellulose-derived and hemicellulose-derived sugars, and methods of making hydrocarbons or hydrocarbon derivatives by providing a host cell containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports cellodextrin into the cell. The present disclosure relates to host cells containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports a pentose into the cell, methods of increasing transport of a pentose into a cell, methods of increasing growth of a cell on a medium containing pentose sugars, and methods of making hydrocarbons or hydrocarbon derivatives by providing a host cell containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports a pentose into the cell.
摘要:
The present disclosure relates to host cells containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports cellodextrin into the cell. The present disclosure further relates to methods of increasing transport of cellodextrin into a cell, methods of increasing growth of a cell on a medium containing cellodextrin, methods of co-fermenting cellulose-derived and hemicellulose-derived sugars, and methods of making hydrocarbons or hydrocarbon derivatives by providing a host cell containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports cellodextrin into the cell. The present disclosure relates to host cells containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports a pentose into the cell, methods of increasing transport of a pentose into a cell, methods of increasing growth of a cell on a medium containing pentose sugars, and methods of making hydrocarbons or hydrocarbon derivatives by providing a host cell containing a recombinant polynucleotide encoding a polypeptide where the polypeptide transports a pentose into the cell.
摘要:
The present disclosure provides compositions and methods for the fermentation of cellodextrins and β-D-glucose. Host cells and recombinant polypeptides having glucose mutarotase activity are provided. Additionally, methods for improving cell growth, production of chemicals, and consumption of cellodextrins and β-D-glucose during fermentation of mixtures containing cellodextrins and β-D-glucose are provided.
摘要:
The present disclosure relates to the production of highly efficient heterologous pathways in host cells by identifying favorable enzyme and/or promoter combinations. In particular the present disclosure provides methods for assembly and selection of multi-step xylose and arabinose/xylose utilization pathways from a library of fungal enzymes. The present disclosure further provides compositions containing favorable enzyme combinations, as well as recombinant yeast expressing such combinations, and methods of use for bioconversion of pentose sugars. Also provided are compositions and methods involving favorable expression patterns identified by utilization of combinations of promoters of varying strengths. Provided herein are methods for assembly and selection of multi-step xylose, arabinose/xylose, and cellobiose utilization pathways from a library of promoters of varying strengths. The present disclosure further provides compositions containing heterologous enzyme-coding polynucleotides under the control of favorable promoters, as well as recombinant yeast expressing such enzymes, and methods of their use for bioconversion of pentose and/or hexose sugars.
摘要:
The present invention relates to a method for tightly temporally controlling the biological activity of a protein of interest in a vertebrate, upon induction of the activity of a fusion protein comprising said protein of interest and an ERM polypeptide containing a mutated ligand binding domain of the human oestrogen receptor α, with a synthetic ligand that does not interfere with oestrogen signalling. In particular, the present invention concerns a method for generating tightly temporally-controlled targeted somatic mutations in a vertebrate, preferably a mouse, by inducing the activity of a fusion protein comprising a site-specific recombinase protein and an ERM polypeptide, with a synthetic ligand devoid of oestrogenic and anti-oestrogenic activities.
摘要:
The present invention provides a universal peptide-binding scaffold. This scaffold is used to bind a target. The target can be a peptide or peptides of interest (for example, peptides associated with a disease state) or can represent the entire proteome. The target can be either protein fragments prepared by enzymatic digestion of the entire proteome or N- or C-terminal short sequences exposed by chemical denaturation of the entire proteome (unfolded proteins). The universal peptide-binding scaffold can be tailored to specifically bind a target using the methods described herein.
摘要:
A new xylose reductase encoding gene from Neurspora crassa was heterologously expressed in E. coli as a His-tag fusion protein and subsequently purified in high yield. This xylose reductase was shown to have a high turnover rate and catalytic efficiency, high stability at room temperature, broad pH profile, and a preference of NADPH over NADH. This enzyme is utilized in production of xylitol and other sugar alcohols such as sorbitol and also in the metabolic enhancement of organisms used for fermentation of plant biomass into ethanol.
摘要:
Phosphite dehydrogenase mutant enzymes were generated that provide relaxed cofactor specificity and increased thermostability over the wild type enzyme. The mutant enzymes are useful for nicotinamide cofactor regeneration.
摘要:
Materials and methods are described to produce xylitol from a mixture of hemicellulosic sugars by several routes. Examples include either as a direct co-product of a biorefinery or ethanol facility, or as a stand-alone product produced from an agricultural or forestry biomass feedstock including using, e.g. ethanol waste streams.
摘要:
Engineered mutant xylose reductases demonstrate higher preference to xylose than arabinose. Amino acid mutations were engineered in to native xylose reductase from Neurospora crassa. Mutant xylose reductases are useful in the production of xylitol and ethanol.