6242results about "Peptides" patented technology

This disclosure provides cyclic peptide compounds of formula (A) or formula (II) as inhibitors of Ras kinase, and compositions and use of the same in treating diseases associated with Ras kinase.

The invention relates to the field of preparation and application of biological peptides, in particular to a hippocampal swelling peptide and application thereof in preparation of functional products for repairing male reproductive system injury. A green controllable enzymolysis technology is utilized to obtain protein polypeptide with nutritional, health-care and medicinal values, an active peptide sequence with high biological activity is obtained through further research on the basis, high-purity active peptide is obtained through a chemical synthesis mode, and the biological activity of the peptide is verified through mouse spermatogonium.

The invention discloses a xanthine oxidase inhibitory peptide with a kidney improving function and application thereof, and belongs to the technical field of biological medicines.The xanthine oxidase inhibitory peptide is screened out by conducting enzymolysis, separation and purification on litopenaeus vannamei processing by-products and utilizing a molecular docking technology, the amino acid sequence of the xanthine oxidase inhibitory peptide is Pro-Leu-Gly-Pro-Pro-Pro, and the amino acid sequence of the xanthine oxidase inhibitory peptide is Pro-Leu-Gly-Pro-Pro-Pro. And the half inhibition concentration of the polypeptide is 2.356 + / -0.2448 mM. The xanthine oxidase inhibitory peptide is proved to have an improvement effect on hyperuricemia mice, the improvement effect is mainly characterized by reducing the content of serum uric acid, creatinine and urea nitrogen of the hyperuricemia mice, inhibiting the activity of xanthine oxidase (XOD) in serum and livers of the mice, inhibiting synthesis of uric acid and improving kidney injury of the mice, and Toxinpred prediction shows that the xanthine oxidase inhibitory peptide has the effect of inhibiting the activity of xanthine oxidase (XOD) in the serum and livers of the mice. The xanthine oxidase inhibitory peptide is free of toxic and side effects, so that the xanthine oxidase inhibitory peptide has a wide application prospect in preparation of food or drugs for improving renal functions.

The invention provides an antibacterial peptide cAMP048 sourced from microorganisms in a deep sea environment and application of the antibacterial peptide cAMP048, and belongs to the technical field of peptide inhibitors. The antibacterial peptide cAMP048 has an amino acid sequence as shown in SEQ ID NO: 1 (Sequence Identity Number 1). The antibacterial peptide can inhibit the growth of acinetobacter baumannii at 64 mu M, inhibit the growth of multi-drug-resistant acinetobacter baumannii and multi-drug-resistant enterococcus faecium at 128 mu M and inhibit the growth of escherichia coli, staphylococcus aureus and multi-drug-resistant klebsiella pneumoniae at 256 mu M. The antibacterial peptide can be used for preparing products with antibacterial and / or bactericidal performance, and can be applied to preparation of antibacterial and / or bactericidal products. Such as food, skin care products or medical supplies.

The invention relates to the technical field of genetic engineering, and particularly discloses a genetic engineering bacterium for producing melanin as well as a construction method and application of the genetic engineering bacterium. According to the application, the yield of the melanin can be effectively increased by modifying a metabolic pathway of the genetically engineered bacterium, and the yield of the melanin reaches 6.2 g / L and 18.5 g / L respectively through shake-flask culture and 5L fermentation tank culture. Compared with the prior art, the yield of melanin produced by the genetically engineered bacterium is improved by 30% at the shake flask fermentation level, the fermentation yield of a fermentation tank is improved by 4.3 times, in addition, expensive tyrosine is changed into glucose as a fermentation precursor substance, the production cost is greatly reduced, and an efficient and feasible solution is provided for large-scale production of melanin.

The invention discloses a method for improving beef quality, an action mechanism and an experimental method, in a cattle body, vitamin A can activate the expression of EBF2 through an active metabolite RA of the vitamin A, and the EBF2 can inhibit the transcription process of CYP26B1 in a targeted manner to maintain the activity of a retinol signal channel, so that PPAR gamma and downstream lipid metabolism related genes thereof are activated, and the activity of the retinol signal channel is improved. Fatty acid transport and lipid accumulation in fat cells in the cattle muscle are promoted, fat deposition in the cattle muscle is promoted, and the beef quality is improved. By constructing the molecular network for regulating and controlling the formation of the fat in the cattle muscle, a complex regulation and control mechanism for controlling the fat deposition in the cattle muscle can be understood more deeply, a method for improving the beef quality based on regulating and controlling the vitamin A mediated key factor EBF2 is provided, and a new way is provided for improving the beef quality in a targeted manner.

The invention belongs to the technical field of biological medicines, and particularly relates to a composition for treating male erectile dysfunction and application thereof. The oyster polypeptide is prepared by enzymolysis of oyster protein, can effectively promote proliferation of testicular interstitial cells, enhance and improve sexual desire and improve sexual behavior, has certain clinical application value, has the advantages of simple preparation, easy absorption and the like, and is easy to popularize and apply.

Disclosed are a pentapeptide compound and a composition and use thereof, relating to the technical field of polypeptides, the peptide or a salt thereof having a structure as shown in formula (I): R1-Lys-Lys-Leu-Ala-R2 (I). The invention also relates to a cyclic peptide, and the structure of the cyclic peptide is Cyclo-[Lys-Lys-Lys-Leu-Ala]. The compound disclosed by the invention has the effects of controlling oil, repairing, resisting oxidation and the like, and can be used for nursing skin or mucosa.

The invention relates to antarctic krill peptide with umami and an antarctic krill peptide mixture as well as a preparation method and application thereof. Specifically, the amino acid sequence of the euphausia superba peptide is shown as any one of SEQ ID NO: 1-5. The euphausia superba peptide mixture with delicate flavor is obtained by carrying out enzyme digestion treatment on an euphausia superba peptide solution by using incision enzyme, excision enzyme and freshness enhancing enzyme and harvesting supernate. Molecular docking simulation shows that the euphausia superba peptide disclosed by the invention can be combined with a delicate flavor receptor T1R1 / T1R3. The Antarctic krill peptide and the Antarctic krill peptide mixture can be used for development of umami seasonings, and a new idea is provided for development of marine seasonings.

The invention provides an enhancer RNA (Ribonucleic Acid) molecule MZGAe1 and application thereof, and relates to the technical field of biology. The invention provides an enhancer RNA (Ribonucleic Acid) molecule MZGAe1. The nucleotide sequence of the enhancer RNA molecule MZGAe1 is as shown in SEQ ID NO: 1; meanwhile, the invention further provides a specific sgRNA sequence for activating the molecule in a targeted manner and a recombinant vector of the specific sgRNA sequence. Expression of endogenous MZGAe1 of cells is specifically activated by adopting a CRISPR activation technology, and conversion of mouse embryonic stem cells to bicellular-like cells can be efficiently promoted. By providing a brand-new endogenous targeted MZGAe1 accurate activation tool, the efficient transformation of wild mouse embryonic stem cells to bicellular cells can be realized only under the condition of endogenous activation of single enhancer RNA molecule MZGAe1, the proportion is at least increased by 5%, the expression of a totipotent marker gene ZSCAN4 is activated, and the expression of the totipotent marker gene ZSCAN4 is promoted. And an efficient and specific brand-new research tool and scheme are provided for researching zygote genome activation, embryonic development early events and cell reprogramming.

The invention discloses an application of an HERP gene knockout mouse model in obesity and metabolic disorder diseases. The invention finds that compared with a wild type high-fat group, HERP gene knockout can cause phenotypes such as early obesity, more serious obesity degree, increase of fat weight ratio, aggravation of adipose tissue inflammation, dyslipidemia and glucose metabolism disorder of mice during high-fat feeding. And the HERP gene is knocked out, so that the adipocyte differentiation is increased. The HERP gene knockout mouse is more sensitive to nutrition, obesity can occur more quickly during high-fat feeding, symptoms such as fat amplification, fat inflammation and glucose and lipid metabolism disorder are more serious, and the HERP gene knockout mouse can be used for molecular mechanism research and drug screening of obesity, fat tissue and glucose and lipid metabolism disorder. It is further found that cilostazol can significantly relieve mouse obesity and lipid metabolism disorder caused by HERP gene defects, but has no obvious weight losing effect on normal genotype mice, and a new strategy is provided for precise treatment.

The invention discloses a full D-type antibacterial peptide with high enzymolysis stability and broad-spectrum antibacterial activity and application thereof. The antibacterial peptide is obtained by sequentially and repeatedly arranging D-type tryptophan, D-type arginine and D-type lysine for four times and carrying out C-terminal amidation; the amino acid sequence of the gene is (D-Trp)-(D-Arg)-(D-Lys)-(D-Trp)-(D-Arg)-(D-Lys)-(D-Trp)-(D-Arg)-(D-Lys)-(D-Trp)-(D-Arg)-(D-Lys)-(D-Trp)-(D-Arg)-(D-Lys)-NH2, and is marked as DWRK-12. The antibacterial peptide shows broad-spectrum antibacterial activity and excellent stability, can effectively resist clinically separated multidrug resistant strains, and keeps high cell selectivity at the same time. Due to the characteristics, the antibacterial peptide has important application value in the aspect of developing novel antibacterial drugs, especially in the field of treatment of infection of multiple drug-resistant bacteria.

The invention provides a UTR (Untranslated Region) sequence for improving mRNA (Messenger Ribonucleic Acid) stability and translation efficiency and application of the UTR sequence, and particularly provides an mRNA molecule which comprises a coding region for coding polypeptide or protein and a fragment thereof, a 5 'UTR sequence positioned at the upstream of the coding region and / or a 3' UTR sequence positioned at the downstream of the coding region, the 5 'UTR sequence is a nucleotide sequence as shown in SEQ ID NO: 1, and the 3' UTR sequence is a nucleotide sequence as shown in SEQ ID NO: 2; and / or, the 5 'UTR sequence is a nucleotide sequence as shown in SEQ ID NO: 3, and the 3' UTR sequence is a nucleotide sequence as shown in SEQ ID NO: 4. According to the present invention, the mRNA stability and the translation efficiency are improved through the new and optimized UTR sequence, and the UTR sequence can be used as the element for enhancing the RNA expression efficiency in the nucleic acid treatment drug or the mRNA vaccine so as to provide more and better choices for the mRNA therapy.

The invention discloses a camel blood polypeptide and application thereof in preparation of an alpha-glucosidase inhibitor, a series of polypeptide products are separated from camel blood, and it is found that the camel blood polypeptide with the amino acid sequence being YFKI, DPPTMEL, DKPFGPDL or SEPSGTAFG has the remarkable alpha-glucosidase inhibitory activity; the compound can be applied to preparation of drugs for treating diseases caused by abnormal activity of alpha-glucosidase.

The invention discloses a cyclic nonapeptide with repairing and anti-oxidation effects and application of the cyclic nonapeptide, the amino acid sequence of the cyclic nonapeptide is cyclic (arginine-glycine-aspartic acid-serine-arginine-lysine-valine-lysine-serine), the prepared cyclic nonapeptide has the repairing and anti-oxidation effects, and the cyclic nonapeptide has the repairing and anti-oxidation effects. The composition can be applied to preparation of cosmetics with repairing and / or anti-oxidation effects.

The present invention relates to a method for constructing an eight-gene-edited xenogeneic organ transplantation donor pig, belonging to the field of animal biotechnology. In the wild-type porcine fetal fibroblast cell line, the GGTA1, β4GalNT2, and CMAH genes are knocked out by using the CRISPR / Cas9 gene editing technology, and the humanized genes of hCD39, hCD46, hCD55, hCD59, and hTBM are transfected. Combining with somatic cell cloning technology, GTKO / β4GalNT2KO / CMAHKO / hCD39 / hCD46 / hCD55 / hCD59 / hTBM eight-gene-edited cloned pigs are constructed. Further, through genotype, mRNA, protein expression identification and functional analysis, eight-gene-edited xenogeneic organ transplantation donor pigs are obtained. The present invention solves the technical problems of high production difficulty, low efficiency, and low survival rate of donor pigs for multi-gene-edited xenogeneic organ transplantation, and maximally solves the common problems of immune rejection reaction and complement dysregulation faced during xenogeneic organ transplantation, laying a foundation for more targeted development of donor pigs suitable for different tissue and organ xenotransplantation, and having important value for promoting the clinical transformation of xenogeneic organ transplantation.

The invention relates to a quinazoline compound as well as a preparation method and application thereof. Specifically, the invention relates to a compound as shown in a formula (I) or pharmaceutically acceptable salt, stereoisomer, tautomer, polymorphic substance, solvate, N-oxide, isotope labeled compound, metabolite or prodrug thereof, and a pharmaceutical composition containing the compound or the pharmaceutically acceptable salt, the stereoisomer, the tautomer, the polymorphic substance, the solvate, the N-oxide, the isotope labeled compound, the metabolite or the prodrug thereof. The invention also relates to a preparation method of the compound and application of the compound in preparation of drugs for preventing or treating KRAS G12D-mediated related diseases. # imgabs0 #

An α-amylase inhibitory peptide. The peptide comprises amino acid sequences of eight adjacent amino acids X1, X2, X3, X4, X5, X6, X7, and X8, wherein each amino acid of the peptide is independently selected from a D-amino acid or an L-amino acid, and at least one of X2, X4, and X6 is W. The peptide has α-amylase inhibitory activity, has the effects of losing weight and lowering blood sugar, and can be used for preparing α-amylase inhibitors, weight-losing drugs, hypoglycemic drugs, or foods, health-care products or drugs for preventing or treating obesity-related diseases.

The invention discloses an antibacterial peptide based on D-type amino acid and application of the antibacterial peptide, and the antibacterial peptide is characterized in that the amino acid sequence is w-r-r-w-r-r-w-w-r-k-r (dTrp-dArg-dArg-dTrp-dArg-dArg-dTrp-dTrp-dArg-dLys-dArg). The antibacterial peptide can be synthesized through an Fmoc solid-phase chemical method, the synthesis difficulty is low, and the in-vivo antibacterial activity is good. The antibacterial peptide especially has broad-spectrum killing activity on carbapenem-resistant pseudomonas aeruginosa, pseudomonas aeruginosa, klebsiella pneumoniae, escherichia coli, methicillin-resistant staphylococcus aureus and staphylococcus aureus, is low in hemolytic toxicity, can reach half or more of cell survival rate under medium and low concentration, almost has no toxic effect on cells, and can be used for preparing the antibacterial peptide with a broad-spectrum killing activity on carbapenem-resistant pseudomonas aeruginosa, klebsiella pneumoniae, escherichia coli, methicillin-resistant staphylococcus aureus and staphylococcus aureus. The stability is good, the operability is high, and the cost is low.

The invention discloses a micromolecule NSD3 degradation agent as well as a preparation method and application thereof, and belongs to the technical field of biological medicines. The invention provides a micromolecular NSD3 degradation agent, which has a structure as shown in a formula I or a formula II, has a remarkable inhibition effect on NSD3 protein expression, and has remarkable killing and growth inhibition effects on lung squamous carcinoma cells. The small molecule NSD3 degradation agent provides a new scheme for treatment of lung squamous cell carcinoma, and has a good clinical application prospect. # imgabs0 # imgabs1 #

The invention discloses an aspergillus niger recombinant bacterium AnCT-XynB-K-agdA and application thereof, and belongs to the technical field of microbiology and bioengineering. According to the invention, Aspergillus niger AnCat is taken as an expression host, firstly, an acid protease regulatory factor prtT is knocked out to obtain a defective strain, and then different chaperonins are subjected to fusion expression by optimizing integration sites of a laccase lcc9 expression cassette, so that the high-expression laccase chaperonin is obtained. According to the method, an expression vector pC3-5 'agdA-PcitA-XynB-L-lcc9-hph-3' agdA is constructed, a recombinant bacterium AnCT-XynB-K-agdA is further obtained, the enzyme activity of the extracellular laccase subjected to shake flask fermentation reaches 1821.2 U / L, and finally, the recombinant efficient expression of the laccase Lcc9 in aspergillus niger is realized.

The invention relates to a radionuclide-labeled glucose derivative molecular probe and application thereof, and belongs to the technical field of nuclear medicine. According to the present invention, propargyl glycine is used to synthesize an amino acid skeleton, and the amino acid skeleton reacts with glucose azide to prepare a series of radionuclide-labeled glucose derivative molecular probes, such as [68Ga] Ga-NOTA-SDG, [68Ga] Ga-NOTA-DDG, [68Ga] Ga-NOTA-TDG, [68Ga] Ga-DOTA-SDG, [68Ga] Ga-DOTA-DDG and the like; the glucose derivative molecular probe labeled by the series of radionuclides has the advantages of being simple and rapid in labeling, high in radiolabeling yield and good in stability, can accurately position tumors, has good tumor uptake and lower non-target tissue uptake, and has great application prospects in preparation of broad-spectrum tumor imaging agents.

The invention provides bacillus amyloliquefaciens as well as a construction method and application thereof. Wherein the bacillus amyloliquefaciens is the bacillus amyloliquefaciens of which the stress response transcription factor glcR gene is knocked out, and the bacillus amyloliquefaciens is a bacillus amyloliquefaciens of which the stress response transcription factor glcR gene is knocked out; the nucleotide sequence of the glcR gene is as shown in SEQ ID NO: 1. By knocking out a stress response transcription factor glcR gene in bacillus amyloliquefaciens, the level of glutaminase expression by using the bacillus amyloliquefaciens can be enhanced, the enzyme activity of the glutaminase obtained by expression is relatively high, and the activity of the enzyme can be further improved by using the modified strain; powerful technical support is provided for commercialized production of glutaminase, and great economic benefits and application prospects are achieved.

The invention relates to the technical field of bioactive peptides, in particular to a novel multifunctional collagen-like tripeptide and application thereof, an amino acid sequence contains multiple combinations, X can be selected from multiple components, 3-methoxy-4-hydroxyphenylalanine and the like are added, and the novel multifunctional collagen-like tripeptide can interact with specific proteins, activate related pathways and play multiple physiological functions and is applied to multiple fields. The collagen-like tripeptide has obvious advantages, innovates component expansion functions, improves the preparation method, improves the efficiency, reduces the cost, is matched with other components in the fields of beauty, health care and medicine, enhances the efficacy, realizes targeted delivery, and brings a new opportunity to related industries.

The invention discloses an eel antibacterial polypeptide Ajaspkidin and application thereof in preparation of an anti-vibrio composition. The amino acid sequence of the eel antibacterial polypeptide Ajaspkidin is shown as SEQ ID NO.01. The invention further discloses an application of the eel antibacterial polypeptide The zebra fish antibacterial peptide has the characteristics of excellent molecular characteristics, broad-spectrum antibacterial activity, efficient bactericidal ability, high thermal stability, high biological safety, anti-infection effect on zebra fish infected by vibrio vulnificus, capability of remarkably improving the survival rate of bred animals and the like, and has a wide application prospect.

The invention belongs to the technical field of nuclear medicine molecular diagnosis and treatment, and discloses a modified CAIX targeting cyclic peptide, a nuclide marker and application of the modified CAIX targeting cyclic peptide in tumor diagnosis and treatment. According to the CAIX targeted cyclic peptide, a rigid bifunctional chelating agent RESCA is introduced to replace a traditional chelating agent, and a sulfonated or alkylated amino acid connector is combined, so that the enzymolysis resistance and in-vivo stability of the probe are remarkably improved. By optimizing the structure of the connector, the lipophilicity is reduced, liver and gall metabolism and non-specific uptake are reduced, and the high uptake rate of tumor target tissues is maintained. The therapeutic nuclide marker of the cyclopeptide can be used for intratumoral irradiation therapy using DOTA or NOTA in combination with an alkylated amino acid linker or an albumin ligand. Experiments show that the marker has high radiochemical purity, excellent pharmacokinetic characteristics and low kidney retention, and is suitable for precise diagnosis and targeted therapy of CAIX high expression tumors such as kidney cancer, colorectal cancer and brain glioma.

The embodiment of the invention discloses a sleep peptide and differential metabolite detection method for caenorhabditis elegans, belongs to the technical field of organism metabolism, and aims to research sleep-awakening key metabolite of caenorhabditis elegans and a regulation mechanism of the sleep-awakening key metabolite. According to the sleep peptide for caenorhabditis elegans, the sleep peptide is an F4 monomer as shown in SEQ ID NO: 1. Compared with the prior art, the sleep and awakening process of the caenorhabditis elegans under the intervention of the goat milk-derived sleep peptide is analyzed through a metabonomics technology, the key metabolite for regulating and controlling sleep and awakening is successfully screened out, and a core metabolic pathway related to the key metabolite is disclosed. The application also constructs a metabolite-pathway-target regulation framework, fills the blank of sleep research in the aspect of metabolic regulation, provides a scientific basis for a sleep intervention strategy based on metabolic regulation, and also lays a foundation for developing metabolic markers of sleep states in the future.

The invention relates to a washing and / or cleaning agent, comprising at least one peptide and at least one enzyme which has hydrolytic activity on an ester bond, preferably selected from lipase and esterase, in particular esterase with lipolytic activity, particularly preferably lipase, wherein the peptide is suitable for adhesion to a fat- and / or oil-containing surface or to a surface coated with fat and / or oil or to a surface provided with at least one fat- and / or oil-containing soil, wherein the surface consists of hard surfaces, more preferably surfaces containing or consisting of ceramic (e.g. porcelain, earthenware), metal, steel, stainless steel, plastic, glass, natural and artificial stone, painted and enamelled surfaces, wood, laminate, linoleum and mixtures thereof, particularly preferably tableware (preferably made of ceramic such as porcelain or earthenware and plastic), metal (e.g.cutlery or pots) or glass and mixtures thereof, particularly preferably tableware (preferably made of ceramic such as porcelain or earthenware and plastic), metal (e.g. cutlery or pots) or glass, and / or textiles, more preferably textiles containing or consisting of cotton, polyester, polyamide, polypropylene and mixtures thereof, particularly preferably cotton, polyester and mixtures thereof. Furthermore, the invention relates to methods for cleaning hard surfaces and / or textiles, and to the use of such peptides and agents for improving the cleaning performance on at least one greasy and / or oily soil.

The invention belongs to the field of biosynthesis, and in particular relates to LBD (Levandanenediol Pyrophosphate) synthase and engineered yeast for producing sclareol. In order to solve the problem that in the prior art, the sclareol biosynthesis yield is generally low, LSLPPs mutant containing at least one mutation of D730L, D374L, N674L or G379M is obtained by performing mutation and optimization on LSLPPs pyrophosphate synthase, and the mutant is used for sclareol synthesis. Meanwhile, in order to solve the problem of genetic instability caused by free plasmid expression of part of saccharomyces cerevisiae strains, a sclareol synthesis pathway is constructed in a yeast genome, and meanwhile, an acetyl coenzyme A synthesis pathway, an MVA pathway and a sclareol synthesis pathway are enhanced; chassis bacteria for synthesizing sclareol are modified in a manner of knocking out part of transcription inhibition factors, and the yield of a 5L fermentation tank reaches 26.11 g / L and is greatly improved compared with the prior art.