50 results about "Sequence homology" patented technology

The invention discloses methanogen lyase homologous with a PeiR lyase sequence and application of the methanogen lyase, and aims to solve the problem that PeiR lyase protein of a methanogen cell wall peptide bond can participate in a biological process of hydrolyzing archaea cell walls, effectively kill methanogen and reduce methane production, and protein homologous with the PeiR lyase protein has potential methane reduction potential. According to the invention, a series of biological information software is utilized to identify protein sequences coded by methanogens virus from rumen microbiome sequencing data, and sequence homology between the proteins and PeiR protein is further analyzed to obtain a series of methanogens lyases. In order to realize the expression of the lyase, multiple segments of primers are designed to synthesize a target sequence, and the target sequence is successfully expressed in a prokaryotic expression system. Through the detection of crude enzyme liquid, the effectiveness of the lyase in the aspect of reducing the methane yield is verified in an in-vitro gas production test.

A complex bait data set construction method based on structure and sequence collaborative redundancy elimination belongs to the field of bioinformatics, and comprises the following steps: screening an initial protein complex structure set, removing entries containing nucleic acids, small molecules or non-protein chains, and selecting binary complexes meeting integrity and resolution requirements; secondly, structure clustering and sequence clustering are carried out based on three-dimensional structure similarity and sequence homology, combined comparison is carried out on the two results, and redundant compound entries which are highly similar in structure and sequence are removed; then, taking each cluster representative compound as a target, generating a plurality of groups of bait structures by using a molecular docking or prediction modeling method, and calculating a quality index; and finally, performing stratified sampling and proportion balance based on the score interval of the quality index, and constructing a high-quality protein complex bait data set with structure and sequence collaborative redundancy elimination and balanced quality distribution. The data set generated by the method has the advantages of low redundancy, high diversity and quality distribution controllability.

The invention belongs to the fields of gene engineering, bioengineering and biological medicine, and relates to a nucleic acid molecule for coding human defensin, a method for preparing the human defensin and application. The nucleic acid sequence of the nucleic acid molecule comprises any one of the following sequences: (1) a sequence as shown in SEQ ID NO.2; (2) a nucleic acid sequence for coding human defensin, which is obtained by substituting, deleting or adding one or more than two nucleotides to the sequence as shown in SEQ ID NO.2; and (3) a nucleotide sequence which has at least 80% sequence homology with the nucleotide sequence in (1) or (2) and has the same or similar functions with the nucleotide sequence in (1) or (2). According to the method provided by the invention, the recombinant expression vector is constructed by using nucleic acid molecules for coding the human defensin, the human defensin hBD-3 can be recombined and expressed, the recombinant fusion protein is released to the supernatant of a culture solution, the protein purification is convenient, the obtained recombinant human defensin has a tissue regeneration function, and a new active molecule is provided for the development of a novel drug.

The present invention relates to the field of allergens and more specifically to a novel isolated allergen from the species Cupressaceae shown to be a primary sensitizer for severe peach allergy mediated by the protein Pru p7. The allergen is homologous with Pru P7 in peach, a protein belonging to the Gibberelin Regulating Proteins (GRPs). The novel allergen also 5 shares high sequence homology among other species from the Cupressaceae family and there is therefore also provided additional novel allergens in two other species of the Cupressaceae family. The novel allergens find use in the in vitro diagnosis of, treatment and / or prevention of Type 1 Cupressaceace pollen allergy and Cupressaceace pollen-associated food allergies.

The present invention relates to devices and methods for automatic identification of rearrangements in genomic regions, and in particular, to devices and methods able to identify rearrangements in genomic regions with high sequence homology. The present invention also relates to methods for diagnosing diseases, and methods of treatment of diseases, comprising a step of automatic identification of rearrangements in genomic regions.

To provide a new agent for controlling soil-borne plant diseases, containing a microorganism as an active ingredient.SOLUTION: An agent for controlling a soil-borne plant disease, comprising, as an active ingredient, a Pseudomonad bacterium having a 16SrRNA genome comprising a nucleotide sequence having 96% or more sequence identity to a nucleotide sequence represented by SEQ ID NO: 1, a Pseudomonad bacterium having a 16SrRNA genome comprising a nucleotide sequence having 98% or more sequence identity to a nucleotide sequence represented by SEQ ID NO: 2, or a combination thereof.SELECTED DRAWING: None

The invention provides a fusion transcript recognition method, device and system based on transcriptome multiple comparison data and a medium, and the core of the method is to construct a set of full-chain analysis framework oriented to multiple mapping reads to realize fusion gene detection. Comprising a pairing read segment preliminary screening module based on a loose mapping strategy, a candidate fusion construction module based on an exon graph structure, a remapping module based on an enhanced reference transcriptome, a transcript abundance estimation module based on a probability generation model, and a fusion scoring module based on fusion site specificity support degree. And a false positive inhibition module based on coverage consistency and biological filtration. According to the method, the dependence of a traditional fusion gene detection method on a unique mapping read is broken through, multiple comparative analysis on the fuzzy mapping read abandoned due to sequence homology is proposed for the first time, and high sensitivity and low false positive rate of the fuzzy mapping read are verified in simulated data and real tumor samples; the method has remarkable technical advancement, clinical applicability and expandability.

The present disclosure relates to a composition comprising a peptide having at least 90% sequence homology to a peptide of SEQ ID No. 1 and epidermal growth factor (EGF). It also relates to a process of preparing the composition and its use in treating wounds, including diabetic wound complications.

To provide an engineered meganuclease that recognizes and cleaves the recognition sequence in the human T cell receptor alpha constant region gene.SOLUTION: Provided herein is an engineered meganuclease comprising a first subunit and a second subunit, where the first subunit binds to a first recognition half site of a specific sequence in human T cell receptor alpha constant region gene and comprises a first hypervariable region, and the second subunit binds to a second recognition half site of the specific sequence comprising the specific sequence and comprises a second hypervariable region, where the second hypervariable region has (a) at least 81% sequence homology to an amino acid sequence corresponding to residues 24 to 79 of a specific sequence or (b) at least 86% sequence homology to an amino acid sequence corresponding to residues 24 to 79 of a specific sequence.SELECTED DRAWING: None

The invention relates to the technical field of microbial identification, in particular to a molecular marker for identifying burkholderia cepacia as well as a primer, a kit and application of the molecular marker. The nucleotide sequence of the molecular marker is as shown in SEQ ID NO. 1. According to the detection primer, the kit and the application provided by the invention, the defect that the homology analysis resolution of the 16S rDNA sequence is insufficient in the existing method is overcome, the specific conserved gene sequence of the burkholderia cepacia is fully utilized, and a simple, rapid and economic identification method is established; the method can be used for detecting and identifying burkholderia cepacia pollutants in safety quality control of medicines, cosmetics and foods.

The invention discloses an intestinal symbiotic bacterium for enhancing baculovirus resistance of spodoptera frugiperda and application thereof, and relates to the technical field of microorganisms, the intestinal symbiotic bacterium is derived from the midgut of the spodoptera frugiperda, is separated and purified and is subjected to 16S rDNA (ribosomal deoxyribonucleic acid) gene sequencing identification, the sequence length is 1397 bp, and the sequence homology with the known Glutamicibacter soli is 99.93%. The strain is preserved in Institute of Microbiology, Chinese Academy of Sciences, and the preservation number is CGMCC No.34972. The invention provides intestinal symbiotic bacteria for enhancing baculovirus resistance of spodoptera frugiperda and application of the intestinal symbiotic bacteria, and provides an experimental basis for further revealing an interaction mechanism among a host, a pathogen and the symbiotic bacteria. And meanwhile, a technical basis is provided for realizing a comprehensive virus prevention and control strategy of targeted biological prevention and control and non-target beneficial insect protection of the lepidoptera pests.

The application discloses application of an enzyme in degrading ochratoxin A. The amino acid sequence of the enzyme comprises: (1) a sequence shown in SEQ ID NO. 1, or (2) an amino acid sequence obtained by substituting, deleting or adding one or at least two amino acid residues from the sequence in (1) and being identical or similar in function to the sequence in (1), or (3) an amino acid sequence having at least 90% sequence homology with the sequence in (1) or (2) and being identical or similar in function to the sequence in (1). The application first discovers that an enzyme derived from Thermomonas fusca has the function of degrading ochratoxin A, and catalyzes ochratoxin A to degrade into non-toxic substances, so as to be expected to be applied in degrading ochratoxin A, and the degradation rate is more than 90%, and the application has substantial application value and great significance in the aspect of biological detoxification of food and feed.

A non-coding sRNA in Corynebacterium glutamicum and the use thereof. The non-coding sRNA has an RNA sequence having at least 90% or more sequence homology to a transcription product of the DNA sequence as shown in SEQ ID NO: 1. It is verified by means of experiments that the over-expression of the non-coding sRNA in a recombinant bacterium can significantly improve the yield of branched-chain amino acids, such as L-leucine, L-isoleucine and L-histidine, and the sugar-acid conversion rate, and also reduce the generation of by-product acid impurities. In terms of materials, relatively inexpensive molasses is selected, which provides rich carbon and nitrogen sources, to replace corn syrup which has more impurities. Moreover, the molasses is converted by means of enzymolysis into a nutrient substance containing more carbon and nitrogen sources that can be utilized by the strain. In addition, in order to control the carbon-to-nitrogen source ratio in a fermentation broth, a more accurate feeding process is selected, which can not only ensure the fermentation requirements of the strain, but can also effectively prevent excessively high or low nitrogen source levels in the fermentation broth, thereby achieving the aims of increasing the yield and the sugar-acid conversion rate, and reducing the by-product acid impurities.

A method for producing PF1378A, which comprises a step for obtaining PF1378A by bringing one or more proteins selected from the group consisting of the following (1)-(4) into contact with PF1378B: (1) a protein comprising the amino acid sequence depicted in SEQ ID NO: 2, (2) an amino acid sequence having 70% or more sequence homology with respect to the amino acid sequence depicted in SEQ ID NO: 2, and (3) a protein comprising an amino acid sequence having 70% or more sequence homology with respect to the amino acid sequence depicted in SEQ ID NO: 1. (3) a protein encoded by the base sequence depicted in SEQ ID NO: 1; and (4) a protein encoded by a base sequence having a sequence homology of 70% or more with respect to the base sequence depicted in SEQ ID NO: 1, and having an activity of converting PF1378B into PF1378A.

The present application relates to the field of biotechnology and molecular diagnosis, and discloses a tsRNA detection primer composition, a kit, a method and an application, wherein the primer composition comprises a specific connecting primer for a tsRNA target, a CRISPR / Cas13a guide RNA, a signal probe and an RT-PCR primer. The kit and the method of the present application are based on the combination of a "linker-tailing" connecting reaction and a CRISPR / Cas13a system, and provide three modes of fluorescent detection, colorimetric detection and RT-PCR detection. Among them, the colorimetric detection mode innovatively introduces a Cas13a-mediated in-situ synthesis of a bimetallic nanoscale enzyme technology, and realizes double amplification of the signal through magnetic separation and nanoscale enzyme catalytic color development. The present application can effectively distinguish tsRNA and maternal tRNA with high sequence homology, has the advantages of strong specificity, high sensitivity, simple operation and visual results, and can be widely applied in the ultra-sensitive detection of tumor markers tsRNA and related scientific research and clinical auxiliary diagnosis.

Disclosed herein are fusion proteins comprising a truncated thrombostasin protein having at least 85% sequence homology to a thrombostasin protein, wherein the thrombostasin protein has a carboxy terminal deletion; and a fusion partner protein that is a non-thrombostasin protein. Further disclosed are vaccine compositions thrombostasin proteins having a comprising a carboxy terminal deletion, and methods for inhibiting a response to a thrombostasin protein in a host in need thereof, comprising the disclosed fusion proteins or vaccine compositions. Further disclosed are methods for the preparation of a fusion protein composition. 1005296120 20 24 20 36 26 30 M ay 2 02 4 A B S T R A C T 2 0 2 4 2 0 3 6 2 6 3 0 M a y 2 0 2 4 1 0 0 5 2 9 6 1 2 0

The present invention relates to a novel CRS fragment peptide with immune-enhancing activity and its uses, more specifically to a novel peptide consisting of the amino acid sequence of SEQ ID NO: 2 or an amino acid sequence having 95% or more sequence homology thereto, and its use as a vaccine adjuvant, an anticancer agent, and an antiviral composition. The peptide disclosed in the present invention is a CRS fragment disclosed for the first time in this specification, exhibiting anticancer activity, immune function enhancement, and antiviral activity.

The application discloses application of an enzyme in degradation of zearalenone. The amino acid sequence of the enzyme comprises: (1) a sequence shown in SEQ ID NO. 1, or (2) an amino acid sequence obtained by substituting, deleting or adding one or at least two amino acid residues from the sequence in (1) and identical or similar in function to the sequence in (1), or (3) an amino acid sequence with at least 90% sequence homology to the sequence in (1) or (2) and identical or similar in function to the sequence in (1). The application first discovers that an enzyme derived from Xylaria multiplex has the function of degrading zearalenone, and catalyzes the degradation of zearalenone into non-toxic substances, so as to be expected to be applied in degradation of zearalenone, the degradation rate is more than 90%, and the application has substantial application value and great significance in the aspect of biological detoxification of food and feed.

The invention relates to the field of biotechnology and molecular diagnosis, and discloses a tsRNA detection primer composition, a kit, a method and application, and the primer composition comprises a specific connection primer aiming at a tsRNA target, CRISPR / Cas13a guide RNA, a signal probe and an RT-PCR primer. According to the kit and the method, three modes of fluorescence detection, colorimetric detection and RT-PCR (Reverse Transcription-Polymerase Chain Reaction) detection are provided on the basis of the combination of'linker-tailing 'ligation reaction and a CRISPR / Cas13a system. According to the colorimetric detection mode, a Cas13a-mediated in-situ synthesis bimetallic nano-enzyme technology is innovatively introduced, and dual amplification of signals is realized through magnetic separation and nano-enzyme catalytic color development. The method can effectively distinguish tsRNA and female parent tRNA which are highly homologous in sequence, has the advantages of high specificity, high sensitivity, simplicity and convenience in operation and result visualization, and can be widely applied to ultra-sensitive detection of tumor marker tsRNA and related scientific research and clinical auxiliary diagnosis.

Disclosed herein are fusion proteins comprising a truncated thrombostasin protein having at least 85% sequence homology to a thrombostasin protein, wherein the thrombostasin protein has a carboxy terminal deletion; and a fusion partner protein that is a non-thrombostasin protein. Further disclosed are vaccine compositions thrombostasin proteins having a comprising a carboxy terminal deletion, and methods for inhibiting a response to a thrombostasin protein in a host in need thereof, comprising the disclosed fusion proteins or vaccine compositions. Further disclosed are methods for the preparation of a fusion protein composition.

The application provides application of an artificial synthetic carrier RNA in nucleic acid detection, which is used for improving the sensitivity of exogenous nucleic acid detection, the nucleic acid sequence of the carrier RNA has high homology or cross-complementarity with the rRNA sequence of the endogenous host in the sample to be detected, and the rRNA sequence is the whole or partial sequence of 18S rRNA and / or 28S rRNA or an RNA sequence having at least 90% sequence homology with the whole or partial sequence of 18S rRNA and / or 28S rRNA. The new high-sensitivity exogenous nucleic acid detection technology provided by the application solves the key problems in the prior art, such as poor sample universality, large sequencing background interference in the existing carrier RNA use scheme and low nucleic acid detection sensitivity, significantly improves the effective proportion of trace RNA virus nucleic acid in the final sequencing library, and thus greatly improves the nucleic acid detection sensitivity of viruses and the like.

The application discloses a glycosyltransferase mutant and application thereof, and the mutant is obtained by single mutation or multiple mutations of amino acids at positions 58, 181 or 371 of the amino acid sequence shown in SEQ ID NO. 4 or single mutation or multiple mutations of amino acids at positions 54, 152, 241 or 272 of the amino acid sequence shown in SEQ ID NO. 6. The glycosyltransferase is rationally modified by homologous modeling and sequence homology analysis, and a glycosyltransferase mutant with obviously improved enzyme activity is screened. Compared with the wild type, the relative enzyme activity of the mutants UGTM1-3 and UGTM2-4 is respectively improved by 2.88 times and 3.60 times compared with that before modification, and the mutants have great industrial application potential.

The invention provides a novel nucleic acid polymerase which can be used for a single molecule sequencing technology. The polymerase belongs to a Phi29 polymerase family, but the sequence homology of the polymerase is lower than that of other reported polymerase for a sequencing technology by 60%. Through characterization identification, the polymerase shows good comprehensive performance in the aspects of thermal stability, extension capacity at normal temperature, extension proceeding, utilization capacity / chain substitution function catalytic kinetics for modified nucleotide substrates, electrolyte resistance and the like, and is suitable for a single-molecule sequencing technology based on a scheme of'sequencing while synthesizing '. The invention also provides a beneficial mutant strain of the wild type polymerase, which shows better dynamic characteristics and can improve the sequencing accuracy and flux.

The present invention addresses the problem of providing a photoswitch protein capable of effectively controlling binding and dissociation of a protein compared to conventional photoswitch proteins. The invention relates to an optical switch protein, which is different from the existing optical switch protein consisting of two independent proteins, and is an optical switch protein consisting of a polypeptide. More specifically, the switch protein according to the present invention is, for example, a protein in which the C-terminal of a protein (a) and the N-terminal of a protein (b) are directly or indirectly linked. (a) A protein comprising an amino acid sequence having 80% or more sequence homology with an amino acid sequence obtained by deleting X contiguous amino acid residues from the C-terminal residue to the N-terminal side of the amino acid sequence represented by SEQ ID NO: 1 or SEQ ID NO: 36, where X is an integer of 0-6. (b) a protein comprising an amino acid sequence having 80% or more sequence homology with an amino acid sequence obtained by deleting Y contiguous amino acid residues from the N-terminal residue to the C-terminal side of the amino acid sequence represented by SEQ ID NO: 1 or SEQ ID NO: 36, Y being an integer of 0-55.

This invention relates to a nucleic acid encoding human HGF and its applications. The nucleic acid comprises one or more open reading frames (ORFs), and the ORF nucleic acid sequence has at least 80%, 85%, 90%, 95%, 96%, 97%, 98%, 99%, or 100% sequence homology with nucleic acid sequences selected from SEQ ID NO:21-31. This invention provides a nucleic acid encoding human HGF, nucleic acid constructs, vectors, cells, and drugs thereof, wherein the nucleic acid has a protein expression level superior to that of the native sequence.

To provide a polypeptide corresponding in sequence homology to an active region of a 40s ribosomal protein S2 ("RPS2") that is beneficial as a therapeutic for oral and iv administration.SOLUTION: Provided is an isolated polypeptide that comprises or consists of a 40s ribosomal protein S2 (RPS2) or a fragment thereof, having a specific amino acid sequence.SELECTED DRAWING: Figure 1

The present application relates to a kind of biological species homology analysis systems based on protein / gene sequence data, belong to biological species homology analysis technical field, solve the problem of high cost and low efficiency of detection method in prior art.The system of the present application includes: data preprocessing module, for the obtained protein / gene original data is carried out data cleaning, obtain protein / gene sequence data;Data analysis module includes: protein sequence analysis unit, for according to the frequency of each amino acid in protein sequence, position and its physical and chemical properties, generate protein sequence numerical representation vector;Gene sequence analysis unit, for obtaining the optimal matching sequence in two groups of gene sequences;Species homology judging module, for according to protein sequence numerical representation vector / optimal matching sequence, the distance of each two groups of protein / gene sequence data is calculated, and according to the size of distance, the analysis of protein / gene sequence homology nearness.

The present invention belongs to the fields of genetic engineering, bioengineering and biomedicine, and relates to a nucleic acid molecule encoding human defensin and a method and application for preparing human defensin. The nucleic acid sequence of the nucleic acid molecule includes any one of the following: (1) a sequence as shown in SEQ ID NO.2; (2) a nucleic acid sequence encoding human defensin obtained by substituting, deleting or adding one or more nucleotides to the sequence shown in SEQ ID NO.2; (3) a nucleic acid sequence having at least 80% sequence homology with the nucleic acid sequence described in (1) or (2) and having the same or similar functions. The method provided by the present invention uses a nucleic acid molecule encoding human defensin to construct a recombinant expression vector, which can recombinantly express human defensin hBD‑3, release the recombinant fusion protein into the culture supernatant, and facilitate protein purification. The recombinant human defensin obtained by the present invention has tissue regeneration function, and provides a new active molecule for the development of new drugs.

The invention relates to a centromere sequence alignment method based on phylogenetic information and pairing editing distance, and belongs to the technical field of centromere sequence alignment. According to the algorithm provided by the invention, a collinearity relation is constructed by utilizing phylogenetic information of a satellite sequence and a pairing editing distance. According to the method, firstly, a conservative selection mode is adopted, and an editing distance (ED) threshold value is gradually increased until a collinear framework between two sequences covers more than 20% of the total number of monomers or 100 monomers; according to the method, an ordered chain with the highest comprehensive score is identified through DAGchainer software according to sequence homology and genome coordinates by integrating the physical distance between adjacent elements, the sequence and the E value score of BLAST, and a collinear satellite region is constructed. Then, a sliding window strategy is adopted, 20 collinear satellite pairs serve as a window, sub collinear satellite areas are recognized, and therefore the analysis precision is effectively improved, and local satellite collinear pairs are supplemented by widening an editing distance (ED) threshold value.

The present application relates to a kind of biological species homology analysis methods based on protein sequence data, solve the problem of high cost and low efficiency of detection method.The method of the present application comprises: obtaining the protein sequence of X group biological species, according to the occurrence frequency of various amino acids in each group of protein sequence and the physicochemical properties of each amino acid, generate the amino acid frequency information vector and the average value vector of amino acid physicochemical properties of X group protein sequence;According to the position information of 1~K letter amino acid in protein sequence, generate X group amino acid position probability vector;Dimension reduction is carried out to each group of amino acid position probability vector, and the dimension-reduced amino acid position probability vector is obtained;According to amino acid frequency information vector, amino acid physicochemical properties average value vector and dimension-reduced amino acid position probability vector, the distance of each two groups of protein sequence is calculated, and the distance is analyzed according to the size of protein sequence homology.