62 results about "Ecdysone receptor" patented technology

In accordance with the present invention, there are provided various methods for modulating the expression of an exogenous gene in an isolated cell and in a mammalian subject employing modified ecdysone receptors. Also provided are modified ecdysone receptors, as well as homomeric and heterodimeric receptors containing same, nucleic acids encoding invention modified ecdysone receptors, modified hormone response elements, gene transfer vectors, recombinant cells, and transgenic animals containing nucleic acids encoding invention modified ecdysone receptor.

The present invention relates to non-steroidal ligands for use in nuclear receptor-based inducible gene expression system, and a method to modulate exogenous gene expression in which an ecdysone receptor complex comprising: a DNA binding domain; a ligand binding domain; a transactivation domain; and a ligand is contacted with a DNA construct comprising: the exogenous gene and a response element; wherein the exogenous gene is under the control of the response element and binding of the DNA binding domain to the response element in the presence of the ligand results in activation or suppression of the gene.

The present invention relates to a novel isolated leafhopper ecdysone receptor polypeptide. The invention also relates to an isolated nucleic acid encoding the leafhopper ecdysone receptor polypeptide, to vectors comprising them and to their uses, in particular in methods for modulating gene expression in an ecdysone receptor-based gene expression modulation system and methods for identifying molecules that modulate leafhopper ecdysone receptor activity.

This invention relates to the field of biotechnology or genetic engineering. Specifically, this invention relates to the field of gene expression. More specifically, this invention relates to a novel ecdysone receptor/chimeric retinoid X receptor-based inducible gene expression system and methods of modulating gene expression in a host cell for applications such as gene therapy, large-scale production of proteins and antibodies, cell-based high throughput screening assays, functional genomics and regulation of traits in transgenic organisms.

The present invention relates to non-steroidal ligands for use in nuclear receptor-based inducible gene expression system, and a method to modulate exogenous gene expression in which an ecdysone receptor complex comprising: a DNA binding domain; a ligand binding domain; a transactivation domain; and a ligand is contacted with a DNA construct comprising: the exogenous gene and a response element; wherein the exogenous gene is under the control of the response element and binding of the DNA binding domain to the response element in the presence of the ligand results in activation or suppression of the gene.

This invention relates to the field of biotechnology or genetic engineering. Specifically, this invention relates to the field of gene expression. More specifically, this invention relates to a novel ecdysone receptor/invertebrate retinoid X receptor-based inducible gene expression system and methods of modulating gene expression in a host cell for applications such as gene therapy, large-scale production of proteins and antibodies, cell-based high throughput screening assays, functional genomics and regulation of traits in transgenic organisms.

In accordance with the present invention, there are provided various methods for modulating the expression of an exogenous gene in a mammalian subject employing modified ecdysone receptors. Also provided are modified ecdysone receptors, as well as homomeric and heterodimeric receptors containing sane, nucleic acids encoding invention modified ecdysone receptors, modified ecdysone response elements, gene transfer vectors, recombinant cells, and transgenic animals containing nucleic acids encoding invention modified ecdysone receptor.

The invention relates to an insect steroid receptor protein which is capable of acting as a gene switch which is responsive to a chemical inducer enabling external control of the gene.

The present invention provides diacylhydrazine ligands and chiral diacylhydrazine ligands for use with ecdysone receptor-based inducible gene expression systems. Thus, the present invention is useful for applications such as gene therapy, large scale production of proteins and antibodies, cell-based screening assays, functional genomics, proteomics, metabolomics, and regulation of traits in transgenic organisms, where control of gene expression levels is desirable. An advantage of the present invention is that it provides a means to regulate gene expression and to tailor expression levels to suit the user's requirements.

This invention relates to the field of biotechnology or genetic engineering. Specifically, this invention relates to the field of gene expression. More specifically, this invention relates to novel substitution mutant receptors and their use in a nuclear receptor-based inducible gene expression system and methods of modulating the expression of a gene in a host cell for applications such as gene therapy, large scale production of proteins and antibodies, cell-based high throughput screening assays, functional genomics and regulation of traits in transgenic organisms.

The present invention belongs to the field of insecticides, and relates to a pest-killing and mite-killing composition, which contains an active component A and an active component B, a weight part ratio of the component A to the component B is 1:99-99:1, the active component A is selected from a compound I represented by the following structural formula, the active component B is selected from an organic phosphorus pest/mite killing agent, a nicotine type acetylcholine receptor (nAChR) agonist pest/mite killing agent, an apastia pest/mite killing agent, a proton gradient interference and oxidative phosphorylation affecting uncoupling pest/mite killing agent, a nereistoxin analog pest/mite killing agent, a Ryania receptor regulating pest/mite killing agent, a voltage-dependent sodium ion channel blocking pest/mite killing agent, an ecdysone receptor stimulating pest/mite killing agent, an amino butyric acid (GABA) gated chloride channel antagonism pest/mite killing agent, a microorganism pest/mite killing agent or other pest/mite killing agents, and the active component A has the following structure. The composition of the present invention has advantages of significant synergy, resistance delaying and the like, and can be used for prevention and control of a variety of pests. The compound I is defined in the instruction.

The present disclosure provides boron-containing diacylhydrazines having Formula I:

A gene expression system for controllable expression of ethylene response in a plant cell includes an activation cassette comprising a DNA-binding domain that recognizes a response element; an ecdysone receptor ligand binding domain; and an activation domain; and a target cassette comprising an inducible promoter, which comprises, in operative association, the response element and a minimal promoter responsive to the activation domain. The inducible promoter controls the expression of a nucleic acid sequence that encodes a selected protein that modifies sensitivity to ethylene in the plant. Interaction among the components of the activation cassette and target cassette, when in a plant cell, in the presence of an inducing composition, modulates expression of the selected protein and selectively modulates ethylene sensitivity in the plant cell. This modulation in the expression of the protein is controlled by the timing, the concentration and the duration of the application of the inducing composition. Transgenic plant cells, tissues, organs and entire plants are provided, which in the presence of the inducing composition control ethylene sensitivity. Ethylene sensitivity and/or ethylene production in such transgenic plants and tissues may be controlled for purposes of manipulating ripening, flower senescence and other ethylene sensitive functions of the plant.

The invention discloses a DNA (Deoxyribonucleic Acid) sequence for coding an ultraspiracle protein of a green plant bug. The invention further discloses the ultraspiracle protein of the green plant bug, a recombinant expression vector, a transgenic cell system or a transgenic recombinant bacterium of the DNA sequence for coding the ultraspiracle protein of the green plant bug, application of the recombinant expression vector, the transgenic cell system or the transgenic recombinant bacterium in production of the ultraspiracle protein of the green plant bug as well as a preparation method of the ultraspiracle protein of the green plant bug. The protein is prepared by the following steps: constructing a pEGX-6P-1 prokaryotic expression vector by means of the ultraspiracle protein gene of the green plant bug; generating an inclusion body of the protein through IPTG (Isopropyl-beta-D-Thiogalactoside) induction in escherichia coli Rostetta gami B; then, denaturing and renaturing to form the protein and purifying the protein. The molecular weight of the prepared protein is about 65KD, and the protein concentration is 1.67mg/ml. The purified ultraspiracle protein can provide a previous theoretical basis for a novel insecticide taking an ecdysone receptor as a target.

The present invention provides a screening method of an ecdysone analogue. The method comprises the steps of: 1) determining an active pocket; S2) screening SPECS library according to a receptor-ligand pharmacophore model and a ligand pharmacophore model, and establishing a database 1; S3) performing clustering and drug-likeness analysis of compounds in the database 1, and establishing a database2; S4) performing docking of compounds in the database 2 and the receptor to establish a database 3, screening the receptor binding activity of the compounds in the database 3, and obtaining virtual screening compounds; S5) screening binding activity of the compounds and the receptor in the database 2, and obtaining virtual screening compounds; S6) performing determination of ecdyson receptor binding activity of the virtual screening compounds, and obtaining a hit lead compound; and S7) performing similarity retrieval of the hit lead compound. The virtual screening method can reduce the numberof the experiment screening compounds, can shorten the research and development period and can reduce the economic cost.