36 results about "Penicillium decumbens" patented technology

The invention belongs to the field of microorganism, and particularly relates to a microorganism penicillium strain producing high-activity cellulase. The penicillium strain has a classification name of Penicillium decumbens PD-G3-08, and is preserved in Wuhan University China Center for Type Culture Collection with a preservation number of CCTCC M2011195. The invention also provides an application of the strain in cellulose enzymatic hydrolysis. Through mutation breeding, the penicillium strain producing high-activity cellulase is bred; cellulase crude enzyme liquid is obtained through fermentation of the strain, which has filter paper enzyme activity of up to 10 IU / ml, endoglucanase activity of up to 30 IU / ml, exoglucanase activity of up to 1.5 IU / ml and beta-glucosidase activity of up to 8 IU / ml, respectively being 3 times, 4 times, 4.5 times, and 4 times higher than the activities of an original strain; when the strain is applied to enzymatic hydrolysis of cellulose raw materials, the cellulose conversion rate in 3 days is up to more than 80%, and the cellulase has extremely high activity.

The present invention provides for heterologous expression of beta-glucosidase (BGL) polypeptides encoded by Humicola grisea, Candida wickerhamii, Aspergillus aculeatus, Aspergillus oryzae, Penicillium decumbens, Chaetomium globosum, Neocallimastix frontalis, Debaryomyces hansenii, Kluyveromyces marxianus, or Phytophthora infestans in host cells, such as the yeast Saccharomyces cerevisiae. The expression in such host cells of the corresponding genes, and variants and combinations thereof, result in improved specific activity of the expressed BGL. Thus, such genes and expression systems are useful for efficient and cost-effective consolidated bioprocessing systems.

The invention discloses a compound microorganism live bacteria preparation for degrading papermaking wastewater COD, a preparation method and applications thereof. The preparation contains Penicillium decumbens, Myrothecium Verrucaria, Bacillus massiliensis and a solid fermentation medium. The preparation method comprises the following steps: first, Penicillium decumbens and Myrothecium Verrucaria after inclined plane activation are inoculated in a liquid medium respectively, and cultured at the temperature of 25 DEG C -30 DEG C for 44-52 h to obtain a microorganism bacteria liquid; Bacillus massiliensis after inclined plane activation is inoculated in a liquid medium, and cultured at the temperature of 28 DEG C-37 DEG C for 40-52 h to obtain a microorganism bacteria liquid; second, the microorganism bacteria liquids are mixed uniformly, placed in a solid fermentation medium and fermented and cultured at the temperature of 30 DEG C for 40-80 h, and the processes of drying at the temperature of 40 DEG C-60 DEG C, crushing to 15-50 meshes and sieving are performed. The preparation can degrade papermaking wastewater COD effectively, rapidly and efficiently in applications as a COD-degrading enhancer in the papermaking wastewater treatment process. The preparation can improve wastewater chromaticity and water quality.

The invention relates to a method for preparing a protein feed by mixing straw and straw dilute acid hydrolytic pentose butanol or alcoholic fermentation waste water for solid state fermentation, which comprises the following steps of: mixing the steam-exploded straw or the straw hydrolyzed by dilute acid and the straw dilute acid hydrolytic pentose butanol or alcoholic fermentation waste water in a certain volume to ensure that moisture content is between 70 and 80 percent, after sterilizing, inoculating penicillium decumbens and trametes pubescens to the mixture and performing aerobic solid state fermentation for 4 to 6 days, inoculating candida tropicalis and lactobacillus plantarum and performing anaerobic fermentation for 2 to 3 days, and drying to obtain the protein feed. In the protein feed product prepared by the method, the protein content is between 22 and 27 percent, and the degradation rate of coarse fibers is between 63 and 68 percent. The method can solve the problem of discharging the butanol or alcoholic fermentation waste water; and the waste water and the straw are converted into the protein feed, so that the waste is turned into treasure.

The invention discloses a method for increasing the fermentation yield of epothilone by using the metabolin of competitive microorganism namely rhizopus arrhizus or penicillium decumbens of sorangium cellulosum to induce. The method provided by the invention comprises the following steps of: cultivating the competitive microorganism, and extracting the metabolin of the competitive microorganism; adding the metabolin into a sorangium cellulosum fermentation medium, activating epothilone to produce related regulator genes inside the strain by using the stimulation of the external additive, and further stimulating the synthesis of epothilone. Detection results show that the fermentation yield of epothilone can be increased by 46.3-58.7% as compared with original conditions after the method is used, and the method has important theoretical significance and economic value.

The invention discloses a penicillium deumbens engineered strain containing over-expressed beta-glucosidase, which contains over-expressed beta-glucosidase genes, is named penicillium deumbens Gi31-2 and is preserved in China Center for Type Culture Collection on May 7, 2010 with a preservation number of CCTCC M 2010111. The invention also discloses the application of the strain in production of the beta-glucosidase and degradation of cellulose. The highest activity of the beta-glucosidase of the engineered strain of the invention reaches 3.47 IU / ml and is 2.90 times as high as that of an original host strain, while highest filter paper activity is 3.32 IU / ml and is 1.23 times as high as that of the original host strain. Therefore, the strain is widely applied to the production of the beta-glucosidase.

A comprehensive utilization method of lignocellulose biomass comprises the following steps: (a) performing acid hydrolysis of the lignocellulose biomass, separating to obtain a pentose solution and acid hydrolysis residues; b) performing enzymatic hydrolysis of the acid hydrolysis residues in step (a) by using cellulase, then performing fermentation to produce ethanol, wherein the cellulase is obtained by culturing a strain of penicillium which has a classification name of Penicillium decumbens PD-G3-08, and is preserved in Wuhan University China Center for Type Culture Collection with a preservation number of CCTCC M 2011195; (c) processing the fermentation residues produced in step (b) by using an alkaline solution so as to extract lignin from the fermentation residues; (d) after step (c) is complete, returning to step (b) to perform enzymatic hydrolysis and fermentation by using residues obtained after alkaline solution processing as enzymatic hydrolysis raw materials, and then performing steps (c) and (d). The method realizes the maximum resource utilization of lignocellulose biomass.

The invention relates to a strain of Penicillium decumbens UC086 capable of effectively transforming dehydroepiandrosterone (DHEA) into 1alpha-OH-DHEA, and a culture method thereof and application thereof in transforming steroid medicines, and belongs to the technical field of microorganisms. The strain was preserved in China General Microbiological Culture Collection Center on August 9, 2010 with the collection number of GCMCC NO.4075. The strain has the characteristics that the strain is quickly grown and easy to culture, and can efficiently transform the DHEA into the 1alpha-OH-DHEA; moreover, the product is easy to extract, and the final product has high purity. Through detection, the biological conversion rate of the 1alpha-OH-DHEA is 20 to 50 percent, the product extraction yield is 75 to 80 percent, and the purity of the 1alpha-OH-DHEA product is over 99.5 percent.

The invention relates to a new technical method for increasing the enzyme activity of cellulase. In the fermentation and production process of the cellulase produced from fungal, farnesol is added to increase the enzyme activity of cellulase. By adding farnesol, the filter paper enzyme activity of the Trichoderma reesei cellulase-producing is increased by about 30% and the filter paper enzyme activity of Penicillium decumbens cellulase-producing is increased by about 46%. The method in the invention is simple and practical, the effect of increasing the enzyme activity of cellulase is obvious;and the method can be widely used and can be used in various cellulase-producing industries adopting fungal fermentation.

A comprehensive utilization method of lignocellulose biomass comprises the following steps: (a) performing alkaline hydrolysis of the lignocellulose biomass to extract lignin; (b) performing acid hydrolysis of the residues obtained in the alkaline hydrolysis processing , separating to obtain a pentose solution and acid hydrolysis residues; (c) performing enzymatic hydrolysis of the residues obtained by alkaline hydrolysis processing in step (b) by using cellulase to obtain a solution with a main component of glucose, wherein the cellulase is obtained by culturing a strain of penicillium which has a classification name of Penicillium decumbens PD-G3-08, and is preserved in Wuhan University China Center for Type Culture Collection with a preservation number of CCTCC M 2011195 and a preservation date of June 13, 2011. The method improves the extraction ratio of cellulose enzymatic hydrolysis, and realizes comprehensive utilization of lignocellulose biomass resources.

The invention discloses a penicillium decumbens engineered strain containing over-expressed xylanase, which contains over-expressed penicillium decumbens xylanase I genes, is named penicillium decumbens X8 and is preserved in China Centre for Type Culture Collection on May 7, 2010 with a preservation number of CCTCC M 2010110. The invention also discloses the application of the strain in production of xylanase. The highest activity of the xylanase of the engineered strain of the invention reaches 219.82 IU / ml and is 1.57 times as high as that of an original host strain, which indicates that the strain is widely applied to the production of the xylanase.