118 results about "Extracellular proteins" patented technology

The invention discloses a medicine combination containing fusion protein for suppressing angiogenesis and application, and particularly relates to a medicine combination containing fusion protein of an extracellular protein domain 2 (Flt-2) of a vascular endothelial growth factor (VEGF) receptor 1, extracellular protein domains 3 and 4 (KDR-3 and 4) of a VEGF receptor 2 and human normal immunoglobulin 1(G1) Fc. The medicine combination can keep the fusion protein stable, has the most outstanding advantage of capability of effectively suppressing fusion protein polymer so as to avoid reduction of purity, and accordingly keeps bioactivity of effective components.

A harmless cancer vaccine is made from cancer cells with extracellular proteins including self-recognition molecular patterns being digested by a proteinase. The cancer vaccine is used to vaccinate an individual to induce immune responses against cancer cells systemically. Cancer cells become harmless when they are digested by Tumorase™. Some proteinases including trypsin cannot kill cancer cells completely and treated cancer cells need to be further processed in order to be harmless and effective. Cancer cells may be from tissue-cultured human or animal cancer cell lines or cancer patients directly. Cancer vaccine vaccinated individuals produce cancer vaccine specific immune responses against cancer cells. Immune response components may be isolated and used to fight against cancer for a cancer patient with a suppressed immune system. Cancer vaccine specific immune components may include cancer vaccine specific polyclonal antibodies, B-cells, T-cells, natural killer cells, monocytes, macrophages and other lymphocytes.

The invention discloses a trichoderma reesei recombinant strain capable of highly producing cellulase and application thereof. Vlbltr which grows an incompatible repression protein gene is transformed into trichoderma reesei Rut-C30, so as to obtain the trichoderma reesei Vib1 (CCMCC No.13578). Compared with the strain Vib1 and the trichoderma reesei Rut-C30, the trichoderma reesei recombinant strain has the advantages that the excretion of extracellular protein and the production of cellulase are obviously improved; compared with the trichoderma reesei Rut-C30, the activity of cellulase in the Vib1 in cellulose and bran culture mediums is increased by about 200%, and reaches 3.3U/ml; the enzyme activities of cellobiohydrolase, endo-cellulase and beta-glucosidase are respectively improved; the excretion amount of the extracellular protein in the Vib1 strain is equal to 2.19 times of the excretion amount of trichoderma reesei Rut-30; proved by the results of hydrolysis reaction of pretreated corn straw, compared with the Rut-30 strain, the output of glucose in the Vib1 strain cellulase hydrolyte is increased by 20%.

The invention provides a high-efficiency soil protein extraction method, comprising the following steps: adding soil in a pre-cooling soil protein extraction buffer solution and blending and oscillating the mixture in a 4 DEG C shaking table over night; performing drawing and filtering of the shaken mixture in a buchner funnel using a crude filter paper; processing the drawing and filtering liquid by macroporous resin (D101), filtering the processed liquid through a 0.22 Mum microporous membrane, the filtered liquid being the extracellular protein mother liquid; processing the cells on the filter membrane by cleaning, crushing, centrifugalizing and vacuum drying to obtain the dried powder, namely intracellular soil protein sediment. The extracellular protein mother liquid is processed by centrifuging, separating and vacuum drying to obtain the intracellular soil protein dried powder; degrading the intracellular soil protein dried powder until the degraded intracellular soil protein dried powder is clearly separated on 10% polyacrylamide gel SDS-PAG electrophoresis, the method has high separation efficiency, microbial yield is 37.5%, which is higher than the yield of the traditional method 0.1-1%, simple operation flow, good SDS-PAGE resolution and good mass spectrum identification effect.

The invention discloses a method for increasing lipase expression through glycosylation modification as well as a mutant enzyme and an application thereof and belongs to the field of enzyme engineering. The N-glycosylation mutation is performed on a leading peptide sequence of rhizopus oryzae lipase, the SAS and/or NT amino acid are/is respectively modified to an N-glycosylation site NGT and/or NLT, the extracellular protein concentrations of the obtained mutant enzyme proROLA, proROLB and proROLAB are increased by 211%, 188% and 233% compared with those of the un-glycosylated proROL, the enzyme activities when culturing in a fermentation tank are respectively 8210 U.mL<-1>, 8457 U.ml<-1> and 9366 U.mL<-1>, and the un-mutated proROL extracellular enzyme activity is almost zero. The rhizopus oryzae lipase provided by the invention has obviously increased lipase enzyme activity and can be used in the fields such as food, chemical engineering and biological energy source.

The invention discloses a protein derived from Trichoderma reesei and application the gene of the protein. The application is the application of the Trfogl to controlling the extracellular protein secretion amount of the Trichoderma reesei, and the Trfogl is the protein shown by an amino acid sequence such as a sequence 2 in a sequence table. According to the invention, a technical base is provided for constructing Trichoderma reesei host bacteria and engineering bacteria with an increased extracellular protein secretion amount.

The present disclosure provides yeast transformed with a nucleic acid molecule (GAT1 ) to reduce nitrogen catabolite repression of asparagine transport/degradation and/or overexpress genes (ASP1 or ASP3) encoding cell- wall or extracellular proteins involved in asparagine degradation and/or genes (AGP1 or GNP1 or GAP1 ) encoding proteins involved in asparagine transport under food preparation/processing conditions. The genetically modified yeast has enhanced ability to reduce acnlamide concentration in foods prepared by heating. Also provided are methods and uses of the transgenic yeast for reducing acnlamide in a food product and food products having reduced acrylamide content prepared using the transgenic yeast.

The invention discloses a method for restoring sticky expansion of aerobic granular sludge. According to the method, by appropriately increasing the concentration of metal ions Ca<2+>, Mg<2+> and Fe<2+> in inlet water of an aerobic granular sludge reactor, the micro-organism flocculation is facilitated on the surface of a compressive cell by virtue of double electrode layers, the secretion of hydrophobic extracellular proteins (PN) is increased, so that the sticky expansion problem of the granular sludge occurring in the long-term operation process can be solved. The granular sludge SVI having the sticky expansion can be reduced to 20 to 40 mL/g, and a stable structure and sedimentation performance of the granular sludge can be restored.

Provided herein is an all-in-one saliva collection apparatus that collects saliva to allow for the filtration of saliva in order to separate saliva components, such as extracellular proteins and nucleic acids that are not present in intact cells, from the intact cells and debris remaining in the extracted sample. The filtered saliva samples can be aliquoted into two fractions for protein and/or nucleic acid analysis. The present invention further describes long term storage at ambient temperatures of filtered salivary nucleic acids, and long term storage at ambient temperatures of filtered salivary proteins added to an ethanol solution. The filtered cell-free saliva samples have diagnostic usefulness.

The invention provides a method for removing endotoxin in protein. The method adopts a sequential combination of chromatography, ultrafiltration and common filtration, and accords with a protein purification process flow. With the method, protein purification is realized while endotoxin is effectively removed, and the properties of protein is not influenced. The method is especially suitable to be used in treating various genetically engineered bacteria expressed intracellular and extracellular proteins. With optimized designs of the conditions of filtering mode, filtering pressure, membrane pore size and the like, operation steps and operation time are simplified, such that production cost is reduced, and processing capacity is improved. With the method provided by the invention, the endotoxin content can be reduced to an animal clinical application standard range, and the properties of the product is not influenced while the endotoxin is removed. The method is suitable for large-scale productions and applications.

The invention provides carborane derivatives and application thereof. The structural formulas of three relative novel carborane derivatives are shown as (1), (2) and (3), and antibacterial medicines used as active ingredients of a medicine have the effects of resisting clinically common pathogenic bacteria (staphylococcus aureus, acinetobacter baumannii, klebsiella pneumonia, and proteus mirabilis), and also have the same-degree effect of resisting multidrug-resistant staphylococcus aureus strains and can inhibit multidrug resistance of the multidrug-resistant staphylococcus aureus strains, wherein a compound (2) can react with medicine-resistant staphylococcus aureus extracellular proteins, so adhesion of bacteria on the surface of an organism is reduced, and the formation of a medicine-resistant strain biological film is inhibited. The toxicity and invasiveness of staphylococcus aureus are reduced, treatment efficiency is improved, an adverse effect caused by using a large amount ofantibiotics is avoided, and a novel compound is provided for finding a novel medicine for resisting medicine resistance bacteria.

A reagent for the detection of an extracellular enzymatically active protein produced by a beta-hemolytic streptococcus bacteria found in a host biological fluid includes a proteinaceous substrate or a cholesterol-containing membrane substrate for the extracellular protein. The substrate is nonspecific within the groups of beta-hemolytic streptococcus bacterium and is in contact with an inert solid matrix. Upon reaction between the streptococcus enzymatically activate protein and the substrate, a color change discernable by an unaided human eye results. Extracellular streptococcus protein found in saliva represents a less invasive source of biological fluid for the determination as to whether a host suffers acute pharyngitis.

The invention relates to inhibitors of the urokinase-type plasminogen activator receptor (uPAR). The generated inhibitors are bivalent uPAR-ligands containing the receptor binding domains of the extracellular protease urokinase-type plasminogen activator (uPA) and of the extracellular matrix protein vitronectin (VN), in different configurations, linked by a scaffold. The present invention also refers to the above molecules for use as a medicament, in particular for treatment of cancer, and for diagnostic purposes.

The invention provides an extraction separation method for soil intracellular protein, which comprises the following steps: extracting with a sodium citrate extracting solution to remove soil extracellular protein; extracting and dissolving soil intracellular protein with an SDS (Sodium Dodecyl Sulfate) extracting solution, carrying out further extraction on the intracellular protein with Tris-saturated phenol, methanol-ammonium acetate and the like, and carrying out dielectrophoresis separation. The SDS-PAGE (sodium dodecyl sulfate polyacrylamide gel electrophoresis) detection indicates thatstripes and protein points of the extracted soil intracellular protein are clear, and the extraction separation method for soil intracellular protein is provided for the first time in the world.

The invention relates to a sludge dehydration conditioning method based on a protein denaturant, which is characterized by comprising the following steps: uniformly mixing sludge to be conditioned with the protein denaturant, carrying out protein denaturation reaction, adding a protein emulsifying coagulant, and quickly stirring to obtain a sludge conditioning solution; coagulation and aggregationof water-binding extracellular protein in the sludge are further promoted in an assisted manner, and the dispersion water-holding performance of the protein is reduced. Compared with the prior art, the method has the remarkable advantages of low dosage, mild reaction conditions, no toxicity or harm, no influence on the sludge incineration heat value and the like, provides a new technical way forenvironment-friendly sludge dehydration conditioning, and shows wide market application prospects and important social and environmental benefits.

The invention relates to a fluorescent quantitative PCR method for simultaneous detection of an extracellular protein factor EF and a hemolysin gene SLY of SS2 based on SYBR Green dye solubility curve method. According to the invention, two pairs of specific primers are designed and synthesized based on conserved sequences of the SS2 EF and SLY gene disclosed by GenBank, the PCR reaction system and reaction conditions are optimized, and the fluorescent quantitative PCR method for simultaneous detection of an EF and an SLY gene of SS2 based on SYBR Green dye method is established through analysis of an amplification curve and a solubility curve. On such bases, the mol ratio of EF primers and SLY primers are optimized and the amplification efficiency of the two pairs of primers is adjusted,which enables the two product peaks in the solubility curve to be of similar size. Utilization of the established SYBR Green dye solubility curve method enables convenient and simultaneous detection of SS2 EFs and SLY genes.

The invention relates to a siglec-9 targeted embedding antigen receptor T cell and a purpose thereof. Concretely, the invention provides a Siglec-9 extracellular protein, a targeted MUC1 targeted CARand an engineering immune cell. The engineering immune cell can selectively kill tumor cells of malignant tumor from high-expression MUC1.

The invention discloses an extraction method and an application of lactobacillus extracellular protein. The method can be used for obtaining extracellular protein secreted by lactobacillus at a relatively high level and is simple in a preparation process, low in cost and applicable to large-scale production. The method comprises the following steps: inoculating the lactobacillus in an improved tomato juice culture medium and culturing at the temperature of 37 DEG C under an anaerobic condition; scraping off cultured lactobacillus lawn, transferring to a phosphate buffer solution of which the pH value is 7.2-7.4, re-suspending, afterwards shaking, centrifuging to remove thallus and collecting liquid supernatant; desalting by means of dialysis and concentrating to obtain a crude extract solution of the lactobacillus extracellular protein; performing SephadexG-100 dextran gel chromatography on the crude extract solution of the lactobacillus extracellular protein, and collecting a protein solution having a protein peak to obtain purified lactobacillus extracellular protein. Identification on molecular weight of the lactobacillus extracellular protein shows that the molecular weight is 67KD and 37KD. Application tests of two types of lactobacillus acidophilus extracellular protein show that the 67KD and 37KD extracellular protein has different inhibition effects on growth of HT-29 cells.

The invention discloses a signal peptide for promoting protein extracellular expression, and belongs to the technical field of gene engineering and enzyme engineering. According to the invention, bacillus subtilis is used as a host, and the method comprises the following steps: performing synonymous mutation on endogenous signal peptides Ggt, YweA and YolA of bacillus subtilis, selecting monoclones with high and low fluorescence values through high-throughput screening, and after sequencing identification and signal peptide mutation, inoculating variants into a shake flask for fermentation verification, so that a synonymous mutation sequence capable of remarkably improving the extracellular protein quantity is obtained, and the protein expression quantity can be increased while normal protein translation is guaranteed. The synonymous mutation sequences of the Ggt signal peptide, the YweA signal peptide and the YolA signal peptide respectively enable the extracellular enzyme activity tobe improved by 1.45 times, 0.59 times and 1.04 times compared with that of a wild type, so that a new strategy is provided for extracellular high-efficiency expression of enzymes.