28 results about "Phosphorylation site" patented technology

The invention belongs to the technical field of biological materials and biological information, and provides a space phosphorylation modification omics detection method. According to the detection method disclosed by the invention, proteomics analysis can be carried out on trace sample phosphorylation, 4259 phosphorylation sites can be identified by 5 micrograms of peptide fragments, and the credibility of 3506 sites is greater than 0.75.

The invention discloses application of an NR1D1 protein phosphorylation site in preparation of cerebral hemorrhage treatment drugs, and belongs to the technical field of molecular biology. According to the invention, the specific phosphorylation site and phosphorylation modification level of the NR1D1 protein are determined for the first time, and the NR1D1 protein can be used as a key marker for evaluating the secondary nerve injury degree of the hemorrhagic cerebral apoplexy and developing treatment and / or alleviation of the hemorrhagic cerebral apoplexy; a specific antigen peptide and an antibody for accurately detecting the NR1D1 protein phosphorylation site are further constructed, and an efficient tool is provided for molecular evaluation of hemorrhagic stroke secondary nerve injury; meanwhile, polypeptide molecules capable of inhibiting NR1D1 protein phosphorylation are researched and developed, through the dual effects of specifically blocking the phosphorylation process and reducing protein degradation, necrosis of brain tissues around hematoma after hemorrhagic cerebral apoplexy is relieved, secondary dyskinesia is improved, and the effect of inhibiting NR1D1 protein phosphorylation is achieved. And a brand new scheme is provided for molecular evaluation and targeted intervention of hemorrhagic stroke secondary nerve injury.

The application discloses an antigen peptide targeting DRP1 protein Ser572 phosphorylation, an antibody and application thereof, and particularly relates to the technical field of biological medicines, and the antigen peptide has immunogenicity of targeting a DRP1 protein Ser572 phosphorylation site, wherein the amino acid sequence of the antigen peptide is RETKNVA{piSer}GGGGVGC, and {piSer} indicates that serine at the site is modified by phosphorylation. The antibody prepared by the application can stably recognize DRP1 Ser572 phosphorylation modification at a cell and animal level, can clearly reveal a molecular mechanism of the site phosphorylation in regulating DRP1 liquid-liquid phase separation and mediating myocardial mitochondrial damage, can support basic mechanism research of diseases such as sepsis, can be used for developing a specific ELISA kit and a pharmaceutical composition, fills a technical gap of DRP1 Ser572 phosphorylation related research and clinical transformation, and provides a brand-new technical support for diagnosis and treatment of cardiovascular diseases, sepsis and other major diseases.

The invention discloses an IBDV (Infectious Bursal Disease Virus) mutant based on VP1 protein T425 and R426 synergistic modification and application of the IBDV mutant. The invention identifies that threonine at the 425th site on the VP1 protein is a new phosphorylation site for the first time, and reveals that threonine at the 425th site and adjacent arginine methylation modification at the 426th site have a synergistic positive feedback regulation relationship. Based on the mechanism, a T425 and R426 double-site modification deleted virus mutant is successfully constructed, and the mutant shows a phenotype with severely weakened replication ability. In addition, the invention also provides an antibody capable of specifically recognizing pT425, an application of a GSK-3 kinase inhibitor in inhibition of virus replication, and a related screening and detection method. The invention provides a new target and strategy for developing novel IBDV attenuated vaccines, antiviral drugs and diagnostic reagents.

According to the application of the reagent for detecting the phosphorylation level of the S202 and T205 sites of the MAPT protein in preparation of the renal fibrosis diagnosis product, the function research of the MAPT protein is expanded from the traditional field of glomerular podocytes to renal tubular epithelial cells and the fibrosis pathological process of the renal tubular epithelial cells for the first time, and a brand new direction of the MAPT protein in renal disease research is opened up. Different from the conventional general research means which only depends on overall gene knockout or overexpression, the method provided by the invention realizes accurate analysis of the function of the MAPT key phosphorylation site by using the site-specific mutant. Through a systematic function determination experiment, the invention discloses an anti-intuition biological rule with great theoretical significance: although phosphorylation of the sites S202 and T205 obviously drives the fibrosis process of the renal tubular epithelial cells, the fibrosis phenotype cannot be improved by simulating the dephosphorylation state (S202A / T205A mutant) of the sites.

This invention relates to the field of pharmaceutical technology for treating diseases related to heavy metal exposure, specifically to the application of a small molecule compound targeting the phosphorylated serine 43 site of ARMC10 in the preparation of drugs for treating neurological damage caused by tin exposure. This technical solution is the first to discover that trimethyltin chloride exposure can specifically induce abnormal phosphorylation of ARMC10, thereby causing neuronal death and cognitive impairment. Based on this mechanism, a small molecule compound targeting a specific phosphorylation site of ARMC10 is proposed, which effectively reverses neurological damage and protects neuronal structure and function by blocking its mediated abnormal mitochondrial division and dysfunction. This solution solves the problem of existing technologies lacking effective treatments for tin exposure-related neurological damage due to the lack of clear drug targets, and has ideal application prospects. This small molecule compound has a well-defined structure and a clear mechanism of action, is easy to further develop, and possesses good drug development and commercialization prospects.

The invention discloses a targeted ATAD3A phosphorylated polypeptide and application thereof in preparation of an anti-aging product. The targeted ATAD3A phosphorylated polypeptide is composed of a functional peptide with an amino acid sequence as shown in SEQ ID No.1 and a cell-penetrating peptide connected with the N end of the functional peptide. Research finds that overexpression of phosphorylated ATAD3A promotes cell aging, which prompts that targeted inhibition of ATAD3A phosphorylation may have an anti-aging effect. Therefore, the invention designs the TAT-polypeptide targeting ATAD3A phosphorylation site for anti-aging treatment, and the TAT-polypeptide shows a good treatment effect in both cellular level and mouse anti-aging treatment. Therefore, the targeted ATAD3A phosphorylated polypeptide opens a new thought and provides a new target for exploring anti-aging treatment, and the polypeptide can be further used for preparing anti-aging drugs and relieving the pressure brought by population aging to social medical care.

The invention designs a biosynthetic hydroxyapatite-based protein kinase B (Akt1) electrochemical sensor which is applied to Akt1 activity analysis in a skin cell aging process. Hydroxyapatite is biologically synthesized through bacillus subtilis and is uniformly deposited on the surface of a glassy carbon electrode by utilizing a potentiometric deposition method. The surface of the material contains rich phosphate groups and hydroxyl groups, can be combined with lanthanum ions, and provides a good interface for subsequent sensor detection. In order to detect the activity of Akt1, a substrate polypeptide containing three phosphorylation sites is designed. The Akt1 is subjected to phosphorylation of a substrate polypeptide, negative charges are increased, combination of the Akt1 and lanthanum ions on the surface of the electrode is enhanced, the impedance on the surface of the electrode is increased, and the activity of the Akt1 is reflected. And the unphosphorylated substrate polypeptide cannot be effectively attached and shows a relatively small impedance value. The accuracy of the sensor is verified by adopting an Akt1 inhibitor MK-2206. Human skin fibroblasts (GNHu49) are taken as a model, and research finds that the activity of Akt1 in senescent cells is remarkably reduced, so that an experimental basis is provided for researching the activity change of Akt1 and the change of cell functions in the skin senescence process. The invention provides a new technical means for skin aging research, anti-aging drug evaluation and cosmetic technology.

The invention belongs to the field of molecular biology, and particularly relates to a construction method and application of phosphorylation mutation sites of phosphoglucomutase. The mutation site is obtained by mutating threonine at the 144th site of escherichia coli wild-type phosphoglucomutase into aspartic acid, the sensitivity of an escherichia coli mutant strain with the mutation site to nalidixic acid, mitomycin C and tetracycline is remarkably improved, and the mutation site can be used for improving the sensitivity of bacteria to drugs.

The application provides an antibody identification method, a polypeptide composition, a kit and a preparation method and application thereof, and relates to the technical field of biotechnology. The antibody identification method mainly comprises identifying whether an antibody specifically recognizes a 231st phosphorylation site of Tau protein, reacting a to-be-detected antibody with four identification polypeptides respectively, and determining whether the to-be-identified antibody can specifically recognize the 231st phosphorylation site of Tau protein according to a detection result. The four identification polypeptides are based on a basic polypeptide, and the specificity of the to-be-identified antibody to the target phosphorylation site is determined through the phosphorylation difference between the 231st phosphorylation site and potential phosphorylation sites of Tau protein, so that the problem of a complex antibody screening and identification method for recognizing the 231st phosphorylation site of Tau protein in the prior art is solved.

The invention relates to the field of protein detection, in particular to a phosphorylated peptide fragment preparation and space phosphorylated proteomics detection method. By means of the preparation method, enough phosphorylated peptide fragments can be efficiently extracted from a trace sample, the method can be compatible with LCM for use, operation is easy and convenient, the recovery rate is high, and the method is suitable for achieving high-depth space phosphorylated proteomics analysis. Meanwhile, the analysis method shows high sensitivity on the trace level, and compared with a traditional method, the identification number of phosphorylation sites is remarkably increased. Compared with the homogenization treatment of the whole section, the analysis method provided by the invention can more accurately reflect the specificity of the cells in the target area and better reflect the intra-tumor heterogeneity.

The invention discloses a method for improving activity of aspergillus oryzae amylase through CreA C terminal dephosphorylation mutation, and belongs to the technical field of enzyme engineering. According to the method, a CreA dephosphorylation mutant strain is constructed by performing site-specific mutagenesis on a C-terminal phosphorylation site coding gene of an aspergillus oryzae carbon metabolism inhibition core transcription factor CreA, so that a carbon metabolite repression effect is relieved, and the yield of amylase is increased. Specifically, four phosphorylation sites (S414, S415, T416 and S419) at the C tail end of the CreA protein are mutated into valine (V). When the mutant strain is used for fermentation, the expression of amylase can be remarkably improved. Experiments prove that the amylase activity of the mutant strain 4M can be 3 times that of a reference strain after the mutant strain is cultured for 6 days in a culture medium taking starch as a carbon source. The invention provides a new strain modification strategy for efficient production of amylase.

Methods for improving cardiac function are provided. [Solution] Provided is a modified Yes-associated protein (YAP) in which the serine residues at the LATS1 / 2 phosphorylation site and in the region of YAP that binds to TEAD are substituted with alanine. Also provided are nucleic acids encoding the modified YAP, vectors containing the nucleic acid, and compositions containing the modified YAP, as well as nucleic acids encoding the modified YAP or vectors containing the nucleic acid. Also provided are methods for regenerating cardiomyocytes and treating cardiac conditions.

The invention belongs to the field of immunology, and particularly relates to a monoclonal antibody for recognizing phosphorylation of a Tau protein 181 site and application of the monoclonal antibody. When the monoclonal antibody is prepared, antigen polypeptide designed aiming at the 181st phosphorylation site of Tau protein is adopted, the specific sequence of the antigen polypeptide is PK (pT) PPC, and (pT) represents phosphorylated amino acid. The amino acid sequence of the heavy chain variable region of the monoclonal antibody comprises a CDR1 shown as SEQ ID No. 1, a CDR2 shown as SEQ ID No. 2 and a CDR3 shown as SEQ ID No. 3; the amino acid sequence of the light chain variable region comprises a CDR1 shown as SEQ ID No. 4, a CDR2 shown as SEQ ID No. 5 and a CDR3 shown as SEQ ID No. 6. The monoclonal antibody can be used for carrying out high-specificity, high-sensitivity and high-accuracy detection on the 181 site of the phosphorylated Tau protein.

The invention belongs to the technical field of proteomics, and particularly relates to a phosphorylated peptide fragment enrichment identification method for trace tissues. The method comprises the following steps: (1) adding a lysis solution into a trace tissue sample, and heating; performing ultrasonic treatment on the sample in an ice-water bath; adding enzyme for enzymolysis; adding a solution containing a phosphopeptide enrichment material into the sample for incubation; activating and balancing a peptide fragment desalting column by using two enrichment buffer solutions; (2) adding a sample and a mixed solution containing the phosphopeptide enrichment material into the pretreated desalting column; cleaning with a cleaning buffer solution A and a cleaning buffer solution in sequence; eluting with two elution buffer solutions in sequence; and collecting the eluent, and carrying out vacuum concentration and freeze-drying to obtain the enriched phosphorylated peptide fragment of the trace tissue sample. The method can reduce treatment steps and reduce liquid transfer, so that sample loss can be reduced; the pretreatment time is greatly saved; the identification of the phosphorylation site of the protein with the initial quantity as low as 10 ng is realized.

The present disclosure provides proteins, methods, and systems for targeting enzymes to specific subcellular locations to produce post-translational modifications on proteins. Specifically, kinases for phosphorylating proteins containing one or more sites susceptible to phosphorylation are disclosed, along with methods and systems for phosphorylating proteins of interest, such as proteins with nutritional and therapeutic uses. Recombinant host cells engineered to express a non-naturally occurring polypeptide comprising a heterologous serine / threonine kinase, wherein the heterologous serine / threonine kinase is anchored in an intracellular membrane, are disclosed herein.

The application belongs to the technical field of biological medicine, and relates to a BCLAF1 protein Ser564 site phosphorylation antigen peptide, a specific antibody and a preparation method and application thereof. The application identifies BCLAF1 protein Ser564 as a key phosphorylation site through SIK2 kinase screening, and designs and synthesizes a phosphorylation antigen peptide based on the site. After immunizing animals, a polyclonal antibody specifically recognizing BCLAF1 Ser564 site phosphorylation modification is successfully prepared. The antibody has high sensitivity and strong specificity, is suitable for various detection platforms such as immunohistochemistry and immunoblotting, and can be used for evaluating tumor immunotherapy efficacy. The application provides a key tool for analyzing BCLAF1 phosphorylation regulation mechanism, and lays a theoretical foundation for developing an immune combined therapy strategy targeting a SIK2-BCLAF1-CCL5 axis.

The present disclosure provides for proteins, methods, systems for directing enzymes for generating post-translational modifications on proteins to a particular subcellular location. Specifically, kinases for phosphorylation of proteins containing one or more sites susceptible to phosphorylation are disclosed, also with methods and systems for phosphorylating proteins of interest, such as proteins having nutritional and therapeutic uses.

This disclosure relates to the field of diseases caused by reduced synaptic inhibition, preferably diseases caused by reduced activity of the potassium (K) / chloride (Cl) cotransporter (KCC2). This disclosure relates to oligonucleotides in RNA editing methods and their use in targeting adenosine in a codon encoding a phosphorylation site in the SLC12A5 mRNA precursor or mRNA encoding KCC2, preferably adenosine in a codon encoding threonine at position 1007 of the KCC2b isoform. Through editing, threonine is replaced by alanine, thereby removing the phosphorylation site and thereby increasing the activity of the KCC2 protein in a process that restores its GABAergic inhibitory tendency. This disclosure further relates to oligonucleotides for use in the treatment of chronic pain and epilepsy.

The present application relates to a kind of monoclonal antibody and its application of targeting NLRP3-Ser295 phosphorylation site, the monoclonal antibody includes heavy chain variable region and light chain variable region, the VL sequence of the light chain variable region is as shown in SEQ ID No:1, the VH sequence of the heavy chain variable region is as shown in SEQ ID No:2.The light chain and heavy chain expression ratio of the monoclonal antibody can be accurately controlled, combined with humanization technology, it can be used for specified monoclonal antibody bioreactor amplification, satisfy the basic demand of detection reagent or drug batch production;Light chain variable region and heavy chain variable region can specifically recognize the Ser295 phosphorylation site (p-NLRP3 S295 ) of NLRP3 protein, realize the accurate blocking of NLRP3 inflammasome activation path, significantly reduce the side effect caused by non-specific crosstalk;And the intracellular delivery platform of eTAT can be universal, provide modularization reference for the development and application of intracellular antibody-drug conjugate (ADC).

The invention belongs to the technical field of immunodetection, and particularly relates to a Tau protein 289 phosphorylation site specific binding protein, an Alzheimer's disease diagnostic kit and a preparation method and application thereof. The Tau protein 289 phosphorylation site specific binding protein provided by the invention has specific CDRs, the specific binding protein shows significant abundance change in the early stage of AD by specifically recognizing the p-tau-289 site, and compared with p-tau-181 and p-tau-217, the specific binding protein shows higher specificity in the aspect of identifying the Alzheimer's disease and the non-AD neurodegenerative disease, so that the specific binding protein can be used for identifying the Alzheimer's disease and the non-AD neurodegenerative disease. Accurate recognition can be achieved in the preclinical stage, and a key time window is provided for ultra-early intervention.

This invention belongs to the field of immunoassay and discloses an antigenic peptide phosphorylated at amino acid position 433 of CRTC2, a specific antibody, and its applications. Mass spectrometry analysis reveals for the first time the role of the CRTC2 Ser433 phosphorylation site in radiotherapy resistance, indicating that the phosphorylation level of CRTC2 Ser433 can serve as an indicator for predicting the radiosensitivity of liver cancer patients. Using the CRTC2 Ser433 phosphorylated antigenic peptide: CPHHRRVPLpSPLS, a specific phosphorylated antibody (CRTC2P-Ser433 antibody) is prepared for the first time. Radiosensitivity can be predicted through immunohistochemical staining scores, demonstrating both specificity and ease of detection.

The application belongs to the technical field of biological immunotherapy, and particularly relates to a retinoblastoma protein mutant and a preparation method and application thereof. The retinoblastoma protein mutant comprises a CDK phosphorylation site mutant retinoblastoma protein 1 mutant polypeptide, a CDK phosphorylation site mutant retinoblastoma protein 1 mutant protein or a CDK phosphorylation site mutant retinoblastoma protein 1 mutant analog. The RB1 is improved for long-term binding to E2F family transcription factors, the cell cycle is delayed, the expression of E2F target genes is significantly inhibited, and the proliferation and growth of cancer cells are significantly inhibited.

The invention belongs to the technical field of biological medicines, and relates to a BCLAF1 protein Ser564 site phosphorylated antigen peptide, a specific antibody, and a preparation method and an application of the BCLAF1 protein Ser564 site phosphorylated antigen peptide. According to the invention, a BCLAF1 protein Ser564 is screened and identified as a key phosphorylation site through SIK2 kinase, a phosphorylation antigen peptide is designed and synthesized based on the site, and after an animal is immunized, a polyclonal antibody capable of specifically recognizing phosphorylation modification of the BCLAF1 Ser564 site is successfully prepared. The antibody has high sensitivity and strong specificity, is suitable for various detection platforms of immunohistochemistry, immunoblotting and the like, and can be used for evaluating the curative effect of tumor immunotherapy. According to the invention, a key tool is provided for analyzing a BCLAF1 phosphorylation regulation mechanism, and a theoretical basis is laid for developing an immune combination therapy strategy of a targeted SIK2-BCLAF1-CCL5 axis.

This invention discloses a method for establishing Alzheimer's disease in tree shrews. The specific steps involve mixing an ethanol solution of 0.5 μg / μl Microcystin-LR with a muscarine solution, and then injecting 2 μl into each of the bilateral Meynert basal ganglia of the tree shrew. After administration, the tree shrew is fed normally for two weeks to complete the Alzheimer's disease model. The muscarine solution is prepared under sterile conditions by adding 200 μl of sterile saline to a vial containing 1 mg of muscarine, repeatedly pipetting to ensure complete dissolution, resulting in a concentration of 5 μg / μl. The Microcystin-LR solution is a commercially available product. This invention involves injecting a mixture of 0.1 μg MC-LR and 3 μg IBO solution into the bilateral Meynert basal ganglia of tree shrews, establishing a stable tree shrew AD model after two weeks. Three days after administration, tree shrews exhibited AD behavioral manifestations, such as lethargy and reduced activity. Two weeks later, the tree shrew brains showed typical AD pathological manifestations, including Aβ deposition and elevated expression levels at multiple phosphorylation sites of Tau protein.

This invention discloses a polyurea-functionalized macroporous adsorption resin microsphere material and its applications. Specifically, macroporous adsorption resin microspheres are used as the matrix, and terephthalic diisocyanate and tri-(2-aminoethyl)amine are used as functional monomers. Through isocyanate-amine polymerization and epoxy-amine ring-opening reaction, a polyurea-rich crosslinked network is bonded and coated onto the surface of the resin microspheres, resulting in surface polyurea-functionalized macroporous adsorption resin (MAR@PUP) microspheres. The surface of MAR@PUP microspheres is rich in urea groups, which can recognize phosphorylation sites in peptides through multiple hydrogen bonds. Based on the differences in phosphorylation degree and the regulation of enrichment conditions, highly selective enrichment of monophosphorylated peptides and polyphosphorylated peptides can be achieved, especially showing excellent enrichment performance for polyphosphorylated peptides.

The application discloses application of a reagent for detecting phosphorylation levels of MAPT protein S202 and T205 sites in preparation of a kidney fibrosis diagnosis product, and first extends function research of the MAPT protein from a traditional glomerular podocyte field to a renal tubular epithelial cell and a fibrosis pathological process thereof, and opens up a brand-new direction of the MAPT protein in kidney disease research. Unlike previous general research means which only depend on whole gene knockout or overexpression, the application realizes accurate analysis of functions of key phosphorylation sites of the MAPT protein by using site-specific mutants. Through systematic function determination experiments, the application discloses a counterintuitive biological law with great theoretical significance: although S202 and T205 site phosphorylation significantly drives a fibrosis process of the renal tubular epithelial cell, simulation of a dephosphorylation state (S202A / T205A mutant) cannot improve the fibrosis phenotype.

The invention discloses application of simulation of non-phosphorylation OsSIZ1 in promotion of plant phosphorus absorption and enhancement of rice blast resistance, and belongs to the technical field of molecular biology. The amino acid sequence of the mutant is as shown in SEQ ID NO.1, and the nucleotide sequence for coding the protein of the mutant is as shown in SEQ ID NO.2. The phosphorylation sites S607 and S609 for regulating and controlling the activity of the OsSIZ1 are mutated into alanine at the same time to silence the phosphorylation state of the OsSIZ1, and the phosphorus absorption and rice blast resistance of rice can be remarkably improved.