304 results about "Coat protein" patented technology

Disclosed are nucleic acid vectors which comprise: (a) a transfer nucleotide sequence comprising (i) a plant active promoter, operably linked to (ii) a recombinant tobacco rattle virus (TRV) cDNA (preferably derived from TRV RNA2) which includes at least cis acting elements permitting replication of the cDNA; a subgenomic promoter operably linked to a sequence encoding a TRV coat protein; and a heterologous nucleotide sequence which is foreign to the virus;(b) border sequences which permit the transfer of the transfer nucleotide sequence into a plant genome. Such vectors may be used as expression vectors or for achieving viral induced gene silencing (VIGS) of a target gene, wherein the heterologous nucleotide sequence is a targeting sequence which corresponding to that gene. Example vectors include pTV00 and vectors which are derived from PTV00 and have the characteristics thereof. Also disclosed are associated processes, methods, viruses or viral particle, kits, host cells and plant tissues.

A method for selecting novel proteins such as growth hormone and antibody fragment variants having altered binding properties for their respective receptor molecules is provided. The method comprises fusing a gene encoding a protein of interest to the carboxy terminal domain of the gene III coat protein of the filamentous phage M13. The gene fusion is mutated to form a library of structurally related fusion proteins that are expressed in low quantity on the surface of a phagemid particle. Biological selection and screening are employed to identify novel ligands useful as drug candidates. Disclosed are preferred phagemid expression vectors and selected human growth hormone variants.

The present invention provides trans-complementation systems for expressing gene products in plants. In general, the invention provides systems including a carrier vector and a producer vector, both based on plant viruses. The producer vector is defective for at least one function needed for successful systemic infection of a plant, e.g., replication, cell-to-cell movement, or long distance movement. The carrier vector supplies the missing function in trans. Certain producer vectors lack a functional coat protein coding sequence, in which case the corresponding producer vector supplies coat protein in trans. The invention also provides novel plant viral vectors and methods of use, e.g., to produce polypeptides or active RNAs in plants.

The invention relates to the field of generating helper phages and phage display libraries for the identification of binding molecules. The invention provide chimaeric phages having a coat comprising a protein mixture. The protein mixture comprises a fusion protein having a proteinaceous molecule fused to a functional form of a phage coat protein and a mutant form of the phage coat protein, wherein the mutant form is impaired in binding to a host cell receptor. The invention further provides new phage collections, novel helper phages and methods and means for producing chimaeric phages, infectious phages and helper phages.

Fusion proteins containing a targeting sequence, an exosporium protein, or an exosporium protein fragment that targets the fusion protein to the exosporium of a Bacillus cereus family member are provided. Recombinant Bacillus cereus family members expressing such fusion proteins are also provided. Genetically inactivated Bacillus cereus family members and recombinant Bacillus cereus family members that overexpress exosporium proteins are also provided. Seeds coated with the recombinant Bacillus cereus family members and methods for using the recombinant Bacillus cereus family members (e.g., for stimulating plant growth) are also provided. Various modifiations of the recombinant Bacillus cereus family members that express the fusion proteins are further provided. Fusion proteins comprising a spore coat protein and a protein or peptide of interest, recombinant bacteria that express such fusion proteins, seeds coated with such recombinant bacteria, and methods for using such recombinant bacteria (e.g., for stimulating plant growth) are also provided.

The invention discloses an RT-LAMP (loop-mediated isothermal amplification) rapid detection kit for cucumber green mottle mosaic virus (CGMMV) and a detection method. The method comprises the steps of extracting plant viruses RNA, detecting an RT-LAMP reaction and electrophoresis detection or fluorochrome, and determining whether a plant carries the viruses. An RT-LAMP primer is designed according to a coat protein gene conserved region of CGMMV, and an RT-LAMP technology is adopted to establish a detection technology which can rapidly and sensitively detect the cucurbitaceous plant CGMMV such as cucumbers, watermelons and calabashes with high specificity and an application method thereof in diagnosing disease. The detection method provided by the invention can utilize the rapid extraction RNA and conventional RNA extraction as an RNA template for an RT-LAMP experiment. The method is utilized to rapidly identify a CGMMV plant sample, the targeted quarantine inspection protective measure is adopted, and the loss caused by the disease is reduced.

The invention relates to a polypeptide, in particular to a human papilloma virus coat protein L1 short peptide and relative application. The invention is characterized in that the sequence of the human papilloma virus coat protein L1 short peptide is N-EVNLKEKFSADLDQFPLGRKFLLQAGLKAK-C. The invention can simultaneously induce human papilloma virus coat protein L1 short peptide with immunity reaction on high risk type and low risk type, which can induce and form the antibody for various human papilloma virus (HPV) and coat protein (HPV L1), to check various HPV or HPV L1, while the antibody can be used in biological pharmaceutical engineering, to purify and prepare various HPV or HPV L1.

Virion-constrained nanoparticles comprising a shell of virion coat protein(s) surrounding an organic, inorganic and / or organo-metallic non-viral nanoparticle and methods of making and using.

The present invention provides a recombinant adenovirus comprising coat proteins that lack native binding. In particular, the present invention provides a recombinant adenovirus comprising a penton base protein and a fiber protein, wherein the penton base protein and the fiber protein lack native binding. The present invention further provides a recombinant adenovirus comprising (a) a penton base protein that lacks native binding and (b) a nonnative amino acid sequence that binds a cell-surface binding site.

The invention relates to a method for detecting tobacco viruses by a reverse transcriptase loop-mediated isothermal amplification (RT-LAMP) technology, which comprises the steps of tobacco virus total ribonucleic acid (RNA) extraction, RT-LAMP reaction, electrophoresis detection and virus type determination, wherein tobacco viruses are selected from two or more than two kinds of viruses from cucumber mosaic viruses (CMV), potato viruses Y (PVY), tobacco etch viruses (TEV), tobacco mosaic viruses (TMV) and tobacco vein banding mosaic viruses (TVBMV). LAMP primers are designed according to a case protein gene conserved region of the tobacco viruses, and a fast, sensitive and high-specificity method is built for detecting various main tobacco viruses by the one-step RT-LAMP technology. A newmeasure is provided for the fast detection of the tobacco viruses.

The present invention is in the fields of medicine, immunology, virology and molecular biology. The present invention provides a composition comprising a modified virus-like (VLP) particle derived from RNA bacteriophage AP205. The invention also provides a process for producing the aforementioned VLP. The modified VLP disclosed in the present invention is useful in the production of compositions for inducing immune responses for the prevention or treatment of diseases, disorders including infectious diseases, allergies, cancers and drug addiction. Moreover, the modified VLP disclosed in the present invention is, in particular, useful to efficiently induce self-specific immune responses, in particular antibody responses.

The invention discloses an animal pathogen microbial pseudovirion vector and a preparation technology thereof. The gene coding sequences of a maturase protein and a coat protein of an MS2 phage and a cDNA (complementary Deoxyribose Nucleic Acid) sequence which corresponds to a 5' non-coded sequence of a gene regulating element sequence included by a genome part are connected to the downstream of a pTrcHis2A vector promoter, so that a pseudovirion vector is constructed. A 6His purification tag is added between the fifteenth and sixteenth amine acids of the coat protein in the MS2 phage througha gene insertion method, a pseudovirion particle comprising an exogenous gene is expressed into an RNA (Ribonucleic Acid)-protein complex, and the pseudovirion particle is captured with a protein purifying method, so that the complex operating process for preparing the pseudovirion particle can be simplified, and the purification quality of the pseudovirion particle is enhanced simultaneously. The pseudovirion vector is pTrcMS of which the nucleotide sequence is shown as SEQ ID No.1.

The present invention concerns spore display methods. More specifically, the invention concerns display of heterologous molecules, such as peptides and polypeptides, on spores of bacilli, such as, for example, Bacillus thuringiensis (Bt) or Bacillus cereus (BC), using externally exposed spore coat proteins or fragments or variants thereof.

The present invention provides a method for modulating the complement cascade by depleting the plasma of the functional activity of complement proteins and thereby reducing or eliminating complement-mediated cell lysis. The invention provides a method for the therapeutic use of coat proteins and derivatives thereof from the Astroviradae family of viruses in the treatment of complement-mediated cell lysis and peptide mediators of inflammation. The invention provides a method for the therapeutic use of coat proteins and derivatives thereof from the Astroviradae family of viruses in the treatment of complement-mediated diseases. Methods are described herein where complement cascade, triggered by either the classical or alternative complement pathways, is prevented from effecting cell lysis and inflammation due to inhibition or depletion of one or more complement components in the serum following administration of astrovirus coat proteins or derivatives.

An immunopotentiating composition comprising a papaya mosaic virus (PapMV), or a virus-like particle (VLP) derived from PapMV coat protein, which is capable of functioning as an adjuvant and thus potentiating an immune response in an animal is provided. The immunopotentiating composition can further comprise an immunogen, which can be fused or otherwise linked to the VLP, or not linked to the VLP. The immunopotentiating composition is capable of potentiating a humoral and / or a cellular response in the animal and is suitable for use as an adjuvant or vaccine. Methods of potentiating an immune response in an animal comprising administering to the animal an immunopotentiating composition are also provided have application in both human and veterinary medicine.

A method for modifying structural gene sequences to enhance the expression of the protein product is disclosed. Also disclosed are novel structural genes which encode insecticidal proteins of B.t.k. HD-1, B.t.k. HD-73, B.t. tenebrionis, B.t. entomocidus, 2 protein of B.t.k. HD-1, and the coat protein of potato leaf roll virus.

The invention provides a kit for detecting chlamydia trachomatis (CT). The kit comprises a nucleic acid releaser and a PCR (Polymerase Chain Reaction) solution, wherein the nucleic acid releaser comprises 0.01-0.5mM / L of surfactin, 20-300mM / L of potassium chloride, 0.01-2% of sodium dodecyl sulfate and 0.05-1% of ethanol; and the PCR solution comprises a forward primer and a reverse primer which are used for amplifying targeted polynucleotide, and a probe for detecting the targeted polynucleotide. A method of releasing nucleic acid by using the nucleic acid releaser in the kit provided by the invention is not obviously different from a boiling method in the detection result, and a violent protein denaturant adopted for the nucleic acid extraction in the method provided by the invention quickly breaks a coat protein structure of a pathogen to release pathogen nucleic acid, so the release and extraction of DNA (Deoxyribonucleic Acid) can be realized without heating; besides, the sensitivity of the provided kit for detecting the CT can be 400 copies / ml, the linearity region of the detection is 400-4.00E+10 copies / ml; and moreover, CT-DNA in an unknown sample such as genital secretions can be quickly and precisely detected by using the kit, so a reliable experiment basis is provided for diagnosing CT infection.

The invention disclose a dot- ELISA (dot Enzyme-Linked Immunosorbent Assay) method and tissue printing ELISA method for detecting the presence of the tomato yellow leaf curl virus in a plant as well as a reagent kit and an application thereof. A monoclonal antibody prepared for tomato yellow leaf curl virus coat protein is utilized to build the dotenzyme-Linked immunosorbent assay (dot-ELISA) method and the tissue printing ELISA method with optimal proportions, and the rapid-detection reagent kit is developed. The dot- ELISA (dot Enzyme-Linked Immunosorbent Assay) method and tissue printing ELISA method for detecting the presence of the tomato yellow leaf curl virus in a plant as well as the reagent kit and the application thereof are suitable for such solanaceae plants as tomato, capsicum, eggplant, tobacco, night shade and jimson weed; the situation of the presence of tomato yellow leaf curl virus in field vegetable samples is examined to detect the incidence of the virus disease and evaluate the occurrence and distribution and the prevalence trend of the tomato yellow leaf curl virus under the field condition; and the detection method has high sensitivity and good specificity, needs short time, is low in cost, and provides a technical support for rapid and large-scale detection of tomato yellow leaf curl virus.

The invention relates to a Qbeta-2aa phage virus-like particle protein which is prepared according to a method comprising the following steps of: (1) mutating a Qbeta phage CP (coat protein) gene terminator codon into a strong terminator codon TAA from TGA and then cloning the strong terminator codon into a protokaryon expression vector pET28a(+) to obtain a coding CP plasmid pETQB-CP; (2) inserting the nucleotides AAGCTT of coding lysine and leucine at the coding immunodominance determining region position in a Qbeta phage CP extension protein gene, i.e. between the 72th codon and the 73th codon of the Qbeta phage CP extension protein gene, and mutating the CP gene terminator codon into GGA from TGA and then cloning the GGA into a protokaryon expression vector PGEX4T-2 to obtain a codingA1 protein plasmid pGEXQbeta-A1; (3) jointly converting the mutated coding Qbeta phage CP plasmid and the A1 protein plasmid into escherichia coli, and inducing and then expressing to obtain the virus-like particle protein Qbeta-2aa; and (4) coupling a short peptide antigen to Qbeta-2aa phage virus-like particles by using a iso-bifunctional cross-linking agent.

The present invention is the preparation process and application of one monoclonal antibody. The monoclonal antibody of the present invention is monoclonal antibody of Staphylococcus aureus coat protein. The preparation process includes immunizing Balb / C mouse with sterilized Staphylococcus aureus, fusing the spleen cell and Sp2 / 0 myelomatosis cell, and screening and cloning to obtain myelomatosis strain secreting Staphylococcus aureus resisting monoclonal antibody and the monoclonal antibody. The monoclonal antibody of the present invention is used in preparing ELISA kit or detecting colloidal gold kit.

In one embodiment, this invention is directed to a protein containing composition for coating a food product, comprising; a liquid batter protein material comprising a liquid and a soy protein material wherein the weight ratio of liquid to soy protein material is from about 3-20 to 1; and a soy fiber material; wherein the food product coating has a non-fiber carbohydrate content of not more than 5 grams non-fiber carbohydrate per serving. In a second embodiment, the composition further comprises a pre-dust protein material in addition to the liquid batter protein material and the soy fiber material. In a third embodiment, the composition comprises a liquid batter protein material comprising a liquid and a soy protein material wherein the weight ratio of liquid to soy protein material is from about 3-20 to 1; a breading protein material containing at least 50% soy protein by weight on a moisture free basis; and a soy fiber material; wherein the food product coating has a non-fiber carbohydrate content of not more than 5 grams non-fiber carbohydrate per serving. In a fourth embodiment, the composition further comprises a pre-dust protein material in addition to the liquid batter protein material, the breading protein material and the soy fiber material wherein the pre-dust protein material contains at least 50% soy protein by weight on a moisture free basis. In a fifth embodiment, the composition comprises a liquid clear coat protein material in addition to the liquid batter protein material, the breading protein material, the pre-dust protein material and the soy fiber material. The liquid clear coat protein material comprises a liquid and a soy protein material wherein the weight ratio of liquid to soy protein material is from about 3-40 to 1.

The invention provides a nano antibody of clostridium difficile glutamate dehydrogenase, and an encoding sequence, a screening method and the application thereof and belongs to the technical field ofimmunology. The invention provides an amino sequence of the nano antibody of clostridium difficile glutamate dehydrogenase. By using a phage display technology, a sequence with a constant region specific gene is inserted into a vector of a phage encoding coat protein, after recombination expression, an exogenous gene expression product is fused with the phage encoding coat protein and demonstratedon the surface of phage to form a phage demonstration library, phage monocloning of the nano antibody is expressed through screening, and the nano antibody is prepared through sequencing. Phage-ELLSAidentification shows that the phage that the nano antibody is expressed on the surface can be specifically combined with clostridium difficile glutamate dehydrogenase antigen and has a good developing property, the result shows that the nano antibody has a good combination property with glutamate dehydrogenase, therefore, the nano antibody can be adopted to replace a common antibody applied to aclostridium difficile immunodetection kit.

The invention provides a pseudoviral particle containing a hepatitis e virus (HEV) RNA (Ribose Nucleic Acid) fragment and a preparation method thereof. The pseudoviral particle is an RNA-protein complex formed by coating hepatitis e virus RNA by an MS2 bacteriophage coat protein, and the RNA-protein complex is spherical. The preparation method comprises the steps of designing and artificially synthesizing a primer to obtain a target gene MS2 through a PCR (Polymerase Chain Reaction) method, connecting the target gene MS2 to a plasmid pET (polyethylene glycol terephthalate)-28b(+) to obtain a recombinant plasmid pET-28b / MS2 / HEV, guiding the recombinant plasmid into escherichia coli for prokaryotic expression, and settling a virus-like particle by adopting a polyethylene glycol method, wherein the virus-like particle is the pseudoviral particle containing the hepatitis e virus RNA fragment. The pseudoviral particle provided by the invention can be used as a standard substance and a quality control product of general HEV gene I-IV type RT-PCR (Reverse Transcription-Polymerase Chain Reaction) detection, and has the characteristics no infectivity, safety, reliability, high stability and resistance to ribonuclease.

The invention relates to a narcissus latent virus detection kit and its detecting method that are special for narcissus latent virus detection. The kit comprises: an upstream primer, a downstream primer, an RT Buffer, an RNA enzyme inhibitor, a reverse transcriptase, dNTPs, a PCR Buffer, Mgcl2, Taq DNA polymerase, a positive control, a negative control and RNase-free ddH2O. In the invention, specific primers are designed according to a coat protein CP gene sequence of the narcissus latent virus, which is detected by a reverse transcription-polymerase chain reaction (RT-PCR) technology. With the obvious advantages of rapidity, accuracy, sensitivity, strong operability and simple kit preparation method, the kit and method of the invention are not only suitable for ports of China to conduct rapid detection on the narcissus latent virus of entry and exit narcissus, and also can be used for narcissus latent virus detection and diagnosis, epidemic surveillance as well as early warning and prediction, thus having broad application prospects.

The present invention relates to an isolated protein or polypeptide corresponding to a coat protein or polypeptide of a grapevine leafroll virus. The encoding DNA molecule either alone in isolated form or in an expression system, a host cell, or a transgenic grape plant is also disclosed. Another aspect of the present invention relates to a method of imparting grapevine leafroll resistance to grape plants by transforming them with the DNA molecule of the present invention. A method for imparting tristeza virus resistance in citrus plants using the DNA molecule of the present invention is also disclosed.