11 results about "Pentose phosphate pathway" patented technology

The invention relates to the technical field of synthetic biology, in particular to a squalene high-yield saccharomyces cerevisiae engineering bacterium and a construction method and application thereof.Saccharomyces cerevisiae CEN.PK.2-1D is used as an original strain, pentose phosphate pathway genes ZWF1, GND1, TAL1 and TKL1 and IDP1 genes of TCA circulation are integrated in a genome of the original strain through homologous recombination, and the squalene high-yield saccharomyces cerevisiae engineering bacterium is obtained. Constructing a dual-channel cofactor supply system to improve the intracellular NADPH level and the NADPH / NADP + ratio; according to the saccharomyces cerevisiae genetic engineering strain Sc-Sq04 constructed by the method disclosed by the invention, the yield of squalene obtained by shake flask fermentation reaches 741.08 + / -28.9 mg / L by further integrating all genes of an MVA way, ERG20 and ERG9 genes, and a new thought is provided for transforming saccharomyces cerevisiae to synthesize terpene compounds and promoting industrial application.

The invention provides an application of lurasidone or a pharmaceutically acceptable salt thereof in preparation of a medicine for preventing and / or treating diabetes individual bone injury healing disorder. The hyperglycemia environment causes excessive secretion of lipocalin-2 (LCN2) by activating a phosphopentose pathway of neutrophil, thereby inhibiting osteogenic differentiation of skeletal stem cells. According to the application of the lurasidone or the pharmaceutically acceptable salt thereof in the preparation of the medicine for preventing and / or treating the diabetic individual bone injury healing disorder, in the application provided by the invention, the lurasidone can specifically inhibit the metabolic pathway and the secretion of LCN2, remodel an immune microenvironment beneficial to repair, and promote the healing of the diabetic individual bone injury. The formation of callus under the condition of diabetes mellitus is obviously accelerated and the mineral density of bone is improved.

The present invention relates to a variant microorganism for producing 1,3-propanediol and a 1,3-propanediol production method using same. More specifically, genes of a microorganism are modified and recombined to produce 1,3-propanediol, by improving the citric acid cycle (TCA cycle) and the glycoxylate pathway in a strain having improved pentose phosphate (PP) and Entner-Doudoroff (ED) pathways. Therefore, a high concentration of 1,3-propanediol may be produced by using the variant microorganism according to the present invention.

This invention discloses an engineered bacterial strain for producing xylitol using glucose as the sole carbon source, its construction method, and its applications, belonging to the field of genetic engineering. Using *Escherichia coli* as the starting strain, this invention optimizes the metabolic pathway by knocking out the 2-keto-3-deoxy-6-phosphate glucuronide gene (eda), knocking out the 6-phosphoglucuronide dehydratase gene (edd), and weakening the glucose phosphoisomerase gene (pgi), thus concentrating the carbon flow in the pentose phosphate pathway. Furthermore, it optimizes the metabolic pathway by knocking out or overexpressing endogenous genes such as the ribulokinase gene (araB). Subsequently, the synthesis of xylitol from glucose was experimentally tested by expressing a recombinant expression plasmid containing 2-arabinol dehydrogenase, 4-arabinol dehydrogenase, and xylitol dehydrogenase. This invention, through optimized metabolic pathways, efficiently converts glucose to xylitol without the need for glycerol addition, and significantly increases the yields of both the precursor arabinol and the product xylitol, demonstrating promising production prospects.

This invention relates to mutant microorganisms for producing 1,3-propanediol and a method for producing 1,3-propanediol using the same. Specifically, the invention involves recombining the genes of microorganisms to enhance the TCA cycle and glycoxylate pathway in strains that strengthen the PP pathway (pentose phosphate pathway) and ED pathway (Entner-Doudoroff pathway), thereby enabling the production of 1,3-propanediol. Therefore, high concentrations of 1,3-propanediol can be produced using the mutant microorganisms according to the invention.

This application relates to the fields of bioengineering and fermentation technology, and discloses a genetically engineered *Escherichia coli* strain that synthesizes L-histidine and its preparation method. The engineered strain uses *Escherichia coli* W3110 as the starting strain and is modified... hisG Gene release from feedback inhibition; knockout ushA and nrdD Genes reduce precursor consumption; inactivation slyA Genes reduce energy waste; heterogeneous integration zwf and gnd Genes and replacement pgi The gene promoter redirects carbon flow to the pentose phosphate pathway, enhancing the supply of key precursors PRPP and reducing agent NADPH; introducing courtE Genes promote product efflux. Combined with an optimized fed-batch fermentation process, this invention effectively solves the problems of insufficient precursor supply, uneven energy distribution, and product inhibition through a systems metabolic engineering strategy, increasing L-histidine yield and sugar-acid conversion rate, making it suitable for industrial production.

The invention belongs to the technical field of microbial fermentation and metabolic engineering, and discloses a recombinant strain for producing succinic acid through co-utilization of glucose and xylose as well as a construction method and application of the recombinant strain. The invention provides a genetically engineered bacterium, and the genetically engineered bacterium can simultaneously utilize and metabolize glucose and xylose by enhancing the activity or gene expression of xylose transporter of pichia kudriavzevii, gene expression involved in a xylose utilization pathway and gene expression involved in a phosphopentose pathway. Experiments prove that the genetically engineered bacterium can improve the co-utilization efficiency of xylose and glucose, has high sugar-acid conversion rate (up to 79.1%), and significantly improves the yield of succinic acid.

The invention discloses escherichia coli capable of producing caffeic acid and application, and belongs to the technical field of biological engineering. According to the invention, a production strain E.coli Tyr10 with high yield of tyrosine shikimic acid is used as a chassis, zwf is knocked out to block a phosphopentose pathway, and tktA, rpe and ppnk are over-expressed to improve the yield of L-tyrosine; meanwhile, the yield of the caffeic acid is increased by heterologous expression of FjTAL and SsaTYR, and further, the yield of the caffeic acid further reaches 211 mg / L by performing protein engineering modification on the SsaTYR; finally, in order to reduce the toxicity of the caffeic acid to cells, the tyrosine ammonia lyase coding gene RtTAL is over-expressed and coded, the yield of the caffeic acid is increased to 471 mg / L, and the yield of the caffeic acid reaches 8.01 g / L when the caffeic acid is finally fermented for 38 h in a fermentation tank. The strain has the industrial application potential of fermentation production of caffeic acid.

The invention discloses a high-yield R-HPPA recombinant beauveria bassiana engineering bacterium, a construction method and application, an NADPH metabolic pathway is enhanced based on a multi-gene synergistic overexpression strategy, and efficient dynamic coupling of cofactor NADPH supply and hydroxylation reaction is realized by systematically regulating and controlling a phosphopentose pathway and a malic enzyme pathway, so that the yield of R-HPPA is increased, and the yield of R-HPPA is increased. According to the present invention, the beauveria bassiana hydroxylation reaction efficiency is improved, the efficient biosynthesis of the R-2-(4-hydroxyphenoxy) propionic acid is achieved, the fermentation process is optimized so as to promote the industrial application, and the new path is provided for breaking through the industrial technology bottleneck of the R-2-(4-hydroxyphenoxy) propionic acid biosynthesis.

The invention relates to the technical field of construction of recombinant bacteria, in particular to riboflavin-producing recombinant corynebacterium glutamicum as well as a construction method and application thereof. According to the construction method of the recombinant corynebacterium glutamicum for producing the riboflavin, a BsriDCAH gene is introduced, a pgi gene is weakened, and a carbon metabolic flow is reguided to a pentose phosphate pathway from a glycolysis pathway, so that the recombinant corynebacterium glutamicum for producing the riboflavin at high yield is obtained.

This invention provides a method for producing allicinol from recombinant *Escherichia coli* using glycerol and glucose as substrates. Using *E. coli* K-12 as the substrate host, a pathway for the synthesis of allicinol from glycerol and glucose is constructed by expressing genes fucA, yqaB, aldO, and rdh, and knocking out the glucose-specific phosphotransferase system IIBC component gene ptsG. Subsequently, genes mzwf, mgnd, alsE, and a6PP are introduced, while genes pfkA, gnd, and edd are knocked out to regulate the flux of the glycolysis and pentose phosphate pathways, thereby directing more carbon sources to the allicinol synthesis pathway. Finally, the formate dehydrogenase gene fdh and the glycerol kinase mutant gene glpK22 are introduced, and the methylglyoxal synthase gene mgsA is knocked out to construct a cofactor NADH cycle system and optimize the allicinol synthesis pathway, thus enabling *E. coli* to efficiently produce allicinol from glycerol and glucose through fermentation.