177 results about "Core protein" patented technology

The present invention describes recombinant adenoviral vectors modified by incorporating targeting ligands or label into viral capsid or structural proteins. In one embodiment, single-chain antibody was introduced into the minor capsid proteins pIIIa or pIX so that the adenoviral vector can be targeted to a particular cell type. In another embodiment, there is provided a noninvasive imaging strategy useful for monitoring the replication and spread of conditionally replicative adenoviral vectors. Viral structural proteins such as pIX capsid protein, core proteins mu, V and VII were expressed as fusion protein with a fluorescent label. Once incorporated into the virions, detection of the structural fusion protein label would indicate the localization of the disseminated viral progeny. The detected fluorescent signals also closely correlate with the level of viral replication and progeny production.

The present invention provides modified hepatitis C virus genomic RNA, comprising nucleotide sequences of genomic RNA portions of two or more types of hepatitis C viruses, which comprises a 5′ untranslated region, a core protein coding sequence, an E1 protein coding sequence, a p7 protein coding sequence, an E2 protein coding sequence, an NS2 protein coding sequence, an NS3 protein coding sequence, an NS4A protein coding sequence, an NS4B protein coding sequence, an NS5A protein coding sequence, an NS5B protein coding sequence, and a 3′ untranslated region, and which can be autonomously replicated. In particular, the present invention relates to modified hepatitis C virus genomic RNA, which can be autonomously replicated by substitution of the RNA sequence portion encoding NS3, NS4, NS5A, and NS5B proteins of hepatitis C virus genomic RNA with a partial RNA sequence encoding NS3, NS4, NS5A, and NS5B proteins of a JFH1 strain shown in SEQ ID NO: 1.

The present invention provides particles for the presentation of haptens for the purpose of eliciting an immune response. The amino acid sequences of the monomers which make up the particles are derived from duck hepatitis B virus core protein. The particles may also deliver nucleic acids. The nucleic acids may be delivered for the purpose of enhancing an immune response, or for other purposes such as gene therapy.

The present invention pertains to a method of converting cellulose to glucose by treating a pretreated lignocellulosic substrate with an enzyme mixture comprising cellulase enzyme and endoglucanase core proteins, wherein the endoglucanase core proteins are present in the enzyme mixture at an amount relative to all endoglucanases from about 35 wt. % to about 100 wt. % and wherein the endoglucanase cellulase enzymes are present in the enzyme mixture at an amount relative to the amount of CBH and EG enzymes from about 2 wt. % to about 50 wt. %. The pretreated lignocellulosic substrate is selected from the group consisting of agricultural residues, residues after starch or sugar removal, dedicated ethanol crops, forestry products, and pulp and paper products, or combinations thereof.

The present invention relates to hepatitis virus core proteins and nucleic acids. In particular, the present invention provides compositions and methods comprising recombinant hepatitis virus core proteins or nucleic acids for use in vaccine formulations.

An in vitro method that allows detection of hepatitis C by detecting hepatitis C virus (HCV) core protein and antibodies to HCV core protein (anti-core antibodies) in a single assay is provided. Cross-reactivity is eliminated in the method preferably by utilizing short peptides, each of which has an amino acid sequence that corresponds to an immunodominant region of the native core protein but which does not wholly encompass the epitope bound by the antibodies utilized in the method. The method can be used to detect the presence of HCV in a subject, and/or to determine the suitability of donor blood or blood products for transfusion purposes. Also provided are diagnostic kits for carrying out the method and a process for selecting suitable capture peptides and monoclonal antibodies for use in the combination method.

The invention discloses a nucleic acid aptamer specifically combined with a hepatitis C virus core protein and application thereof. The nucleic acid aptamer is a single stranded DNA shown in a sequence 2 of a sequence table or single stranded DNA containing the nucleic acid aptamer. The nucleic acid aptamer has better affinity with a hepatitis C virus core protein. By using the nucleic acid aptamer disclosed by the invention, the hepatitis C virus core protein in a solution can be captured and can be also detected, and hepatitis C serodiagnosis and blood screening can be realized. Part of thenucleic acid aptamer disclosed by the invention can be used to replace a monoclonal antibody to capture the core protein for hepatitis C detection. The invention has the advantages of high sensitivity, low cost, easiness of preparation and storage, and high application value.

The invention relates to application of DNA (Deoxyribonucleic Acid)-PKcs in preparation of a medicine for influencing dihydrofolate reductase (DHFR) gene amplification and changing the drug resistance of tumor cells on MTX (Methotrexate) and belongs to biological medicines. The application comprises the following steps: establishing an MTX drug-resistant cell evolution model, selecting low-concentration drug-resistant (HSRs) and high-concentration drug-resistant (DMs) cells as research objects, detecting the gene amplification degree and form in the parent cells and drug-resistant cells, the DNA damage conditions and DNA-PKcs expression conditions, establishing clone which stably interferes the DNA-PKcs in the MTX drug-resistant cells aiming at the core protein DNA-PKcs in the NHEJ path, and detecting the amplification degree and form of DHFR genes in stable interference clone, the cell growth and apoptosis and change of the drug resistance.

A protein is described. The protein comprises a lipid globule targeting sequence linked to a protein of interest (POI) wherein the targeting sequence comprises a hepatitis C virus (HCV) core protein or fragment or homologue thereof.

The invention relates to a recombinant HBV (Hepatitis B Virus) vector for expressing specific HBVshRNA (Hepatitis B Virus Short Hairpin Ribonucleic Acid) as well as a construction method and application of the vector. The recombinant HBV vector is formed by deleting 2111st-2643rd bases, 187th-680th bases or 1060th-1500th bases from an LJ196 vector, and replacing shRNA transcription structure units of the deleted sequences at the deleted sequence deleting positions. The preparation method is simple; RCDNA (Relaxed Circular Deoxyribonucleic Acid) can be efficiently synthesized using Core protein and Pol protein of wild-type hepatitis B virus genome by adopting the recombinant HBV vector, and the synthesis efficiency is higher than that of the wild-type hepatitis B virus genome DNA, the RCDNA synthesis can compete with the duplication of the wild-type hepatitis B virus, simultaneously, the shRNA can be efficiently expressed by utilizing the characteristics of high synthesis efficiency of the recombinant HBV vector, and then the DNA duplication and HBsAg synthesis of the hepatitis B virus can be disturbed. The vector can be applied to preparation a medicine for disturbing the DNA duplication of the hepatitis B virus genome, and a new idea for treating the chronic hepatitis B virus infection is provided.

The present invention relates to hepatitis virus core proteins and nucleic acids. In particular, the present invention provides compositions and methods comprising recombinant hepatitis virus core proteins or nucleic acids for use in vaccine formulations.

The invention discloses fusion protein of divisive ranilla luciferase and HBC (hepatitis B core). The fusion protein is obtained by joint connection of 1 to 229 amino acids of the N-terminal of the ranilla luciferase and core protein of hepatitis B virus (HBV), or obtained by joint connection of 229 to 311 amino acids of the N-terminal of the ranilla luciferase and the core protein of the HBV, the sequence of the amino acids is as shown in SEQ (sequence) ID (identity) No: 1 and No: 3 respectively, and nucleotide sequence encoding the two fusion protein is as shown in SEQ ID No: 2 and No: 4 respectively. The invention further discloses a carrier containing the nucleotide sequence as is shown in the SEQ ID No: 2 and No: 4. and discloses an application about whether the fusion protein as is shown in the SEQ ID No: 1 or the No: 3 is formed or not in indication of core protein dimers of the HBV. An importation foundation is laid for establishing cell models for drug screening in formation of the anti-HBC dimers.

The invention discloses a nucleic acid aptamer of an affinity viral hepatitis C core protein and an application of the nucleic acid aptamer. The nucleic acid aptamer is the following (a) or (b): (a) single-stranded DNA represented by sequence 2 in a sequence table; (b) single-stranded DNA containing the nucleic acid aptamer described in (a). Due to the adoption of the nucleic acid aptamer disclosed by the invention, the viral hepatitis C core protein in a solution can be captured and the viral hepatitis C core protein in a solution can also be detected, which are conductive to hepatitis C serology diagnosis and blood screening. By virtue of the nucleic acid aptamer disclosed by the invention, the monoclonal antibody can be partially replaced to capture core protein for detecting hepatitis C and the nucleic acid aptamer has the advantages of high sensitivity, low cost, and convenience in production and preservation. The nucleic acid aptamer has a relatively high application value.

The invention discloses a recombinant human hepatitis B virus core protein fused protein. The fused protein comprises a protein (X), a linker peptide (L) and a hepatitis B virus core protein (HBc) from the end N to the end C in sequence; the linker peptide (L) has the amino acid sequence of Gly-Ser-(Gly-Gly-Gly-Gly-Ser)n, and n is an integer between 2 and 20 and is 9 or 18, particularly; the end C of the linker peptide (L) is connected with the end N of the hepatitis B virus core protein (HBc); the end C of the protein (X) is connected with the end N of the linker peptide (L); and the protein (X) is a red fluorescent protein or vesicular stomatitis virus G glycoprotein. The hepatitis B virus core protein (HBc) is connected with the functional protein, and the functions of the proteins on two ends of the linker peptide (L) can be both guranteed. The problem in the prior art that the functions of the hepatitis B virus core protein (HBc) and the functions of the functional protein can not be both guaranteed after the hepatitis B virus core protein (HBc) is fused with the functional protein is solved. The fused protein is of great importance to the research on the hepatitis B virus (HBV).