46 results about "Protein Artemis" patented technology

The invention relates to a coding sequence of an AaMYBL1 protein of artemisia apiacea and an application thereof. The amino acid sequence coded by the coding sequence AaMYBL1 of an MYB-like type transcription factor of artemisia apiacea is shown as SEQ ID NO:4. The AaMYBL1 which codes a R3MYB type transcription factor takes part in regulation of density of glandular hairs of artemisia apiacea. An interference vector of the AaMYBL1 transcription factor of artemisia apiacea is transformed into artemisia apiacea by means of the transgenic technology, so that the density of the glandular hairs on the surface of artemisia apiacea can be effectively regulated, thus, the content of artemisinin is improved. The density of the glandular hairs on the surface of a blade of non-transgenic common artemisia apiacea is 24/square millimeter, and the density of the glandular hairs of a blade of transgenic artemisia apiacea inhibiting AaMYBL1 genetic expression is increased to 34/square millimeter; the quantity of total glandular hairs of each blade is increased from 61947 to 93683; correspondingly, the content of artemisinin is improved from 8mg/g DW of non-transgenic artemisia apiacea to 12mg/g DW. The coding sequence provided by the invention is of significance for providing a high-yield stable novel medicine source for scaled production of artemisinin.

The invention belongs to the technical field of biology, and relates to a method for improving artemisinin content in artemisia annua L through transferring allene oxide cyclase (AOC) gene. The method is characterized by: cloning the AOC gene from the artemisia annua L; constructing a plant expression vector containing the AOC gene; transferring the AOC gene into the artemisia annua L through adopting agrobacterium tumefaciens mediation, and regenerating plants; detecting integration situations of the exogenous target gene AOC through PCR, detecting the artemisinin content in the transgenic artemisia annua L through a high performance liquid chromatography and a evaporative light scattering detector; carrying out screening to obtain the transgenic artemisia annua L plants with improved artemisinin content. The artemisinin content in the transgenic artemisia annua L provided by the present invention is substantially improved, the artemisinin content in the non-transformed normal artemisia annua L is 1.53 mg/gDW while the artemisinin content in the AOC-transferred artemisia annua L is up to 10.17 mg/gDW, such that the artemisinin content in the AOC-transferred artemisia annua L is 6.65 times as much as the artemisinin content in the non-transformed artemisia annua. Therefore, with the present invention, a method for improving the artemisinin content in the artemisia annua L t is provided, base for producing the artemisinin on a large scale through the transgene is established.

The invention provides a method for improving an artemisinin content in Artemisia annua L. by DXR (1-deoxy-D-xylulose-5-phosphate reductoisomerase) gene transfer. The method comprises the following steps of: cloning DXR (1-deoxy-D-xylulose-5-phosphate reductoisomerase) gene in the Artemisia annua L., so as to establish a plant expression carrier containing the DXR gene; transferring the DXR gene into Artemisia annua L. through agrobacterium tumefaciens-mediated transformation to grow a plant; detecting the integration condition of the exogenous target gene DXR by a PCR (Polymerase Chain Reaction); detecting the artemisinin content in the transgenic Artemisia annua L. through high performance liquid chromatography-evaporative light scattering detector (HPLC-ELSD); and screening the transgenic Artemisia annua L. plant with improved artemisinin content. The artemisinin content of the transgenic Artemisia annua L. obtained by the invention is obviously improved and high up to 2.4 times that of the non-transferred plant. Therefore, the invention provides the method for improving the artemisinin content in the Artemisia annua L. and lays a foundation for producing artemisinin by using the transgenic Artemisia annua L. in a large scale.

The invention discloses an artemisia apiacea bHLH transcription factor as well as an encoding gene and an application thereof. The artemisia apiacea bHLH transcription factor provided by the invention is protein shown as a) or b): a) protein which consists of amino acid sequences and is shown in sequences 2 in a sequence table; and b) protein which is derived from a), is formed through substituting and/or deleting and/or adding amino acid sequences shown by the sequences 2 in the sequence table through one or a plurality of amino acid residues and is relevant to the artemisinin synthesis. The bHLH transcription factor is instantaneously translated into artemisia apiacea plants to be overexpressed, the expression quantity of the key enzyme in regulated and controlled artemisinin biosynthetic metabolism is greatly improved, and the artemisia apiacea bHLH transcription factor can be used for producing artemisinin. The regulated and controlled artemisinin synthesis method solves the problem of raw material limitation, has a simple production process and is favorable for the large-scale industrial production of the artemisinin.

The invention discloses clone of an artemisia apiacea AabZIP6 gene encoding sequence and an application thereof, and particularly includes clone of the AabZIP6 gene, establishment of a plant expression vector containing the gene, and an activation effect of the gene on a gene promoter being specific in a bio-synthetic route of artemisinin. The nucleic acid sequence of the artemisia apiacea AabZIP6 gene is represented as the SEQ ID No.1, and an amino acid sequence encoded by the gene is represented as the SEQ ID No.2. The invention also discloses a character that the AabZIP6 gene can activate expression of the gene promoters, comprising ADS and ALDH1, which are specific in the bio-synthetic route of artemisinin. The AabZIP6 gene is applied in quality improvement of the artemisia apiacea and can increase the content of the artemisinin in the artemisia apiacea.

The invention relates to a preparation method of artemisinin AaORA protein, an encoding gene and a transgenic artemisinin plant. The amino acid sequence of the artemisinin AaORA protein is shown as SEQ ID NO: 6. The invention also relates to a preparation method of a nucleic acid sequence for encoding the artemisinin AaORA protein, a plant interference expression vector, an agrobacterium tumefacien strain and the transgenic artemisinin plant. An AaORA gene is cloned from artemisinin to construct the plant interference expression vector containing the AaORA gene, agrobacterium tumefacien EH105 is used as a medium to convert the AaORA genetic interference expression vector into the artemisinin; and the integration of an external target gene AaORA is detected by PCR (polymerase chain reaction), the artemisinin content in the artemisinin is determined by a high-efficiency liquid chromatography-evaporative light scattering detector, and the transgenic artemisinin plant with the artemisinin content reduced significantly is prepared via screening.

The invention discloses an AaWBC1 gene promoter; the promoter can regulate and control the specific expression of an AaWBC1 gene in the secretory glandular hairs of sweet wormwood, and the nucleotidesequence of the promoter is shown in SEQ ID NO. 1. Furthermore, the invention discloses the AaWBC1 gene promoter as well as a functional verification method and application thereof. The promoter provided by the invention can guide the specific expression of the reporter gene in the secretory glandular hairs of the plant, thus having a great significance for the genetic engineering breeding which uses plant glandular hair tissues to express and produce metabolites.

The invention relates to an artemisia apiacea translocator AaPDR3 and an application thereof. The amino acid sequence is shown as SEQ ID No.2; the artemisia apiacea translocator AaPDR3 can affect the synthesizing of sesquiterpenes in artemisia apiacea non-secreting type glandular hair; the translocator is encoded by the nucleotide sequence shown as SEQ ID No.1. The invention further provides a method for realizing transgenosis artemisia apiacea seedlings with the artemisia apiacea translocator AaPDR3.

The invention relates to the biological technical field, particularly an AaGTD1 gene for controlling artemisinin synthesis and trichome development in sweet wormwood as well as a coded protein and application thereof in preparing the artemisinin. The invention provides the sweet wormwood AaGTD1 gene with a nucleotide sequence as shown in SEQ ID NO:1; an amino acid sequence of protein AP2/ERF transcription factors coded by the gene is as shown in SEQ ID NO:2. The application disclosed by the invention refers to a method for increasing the content of artemisinin in the sweet wormwood through AaGTD1. The method comprises the following steps: transforming a plant expression vector comprising the gene as shown in SEQ ID NO:1 into a sweet wormwood cell; culturing the transformed sweet wormwood cell to obtain a sweet wormwood plant with increased artemisinin content. The protein coded by the AaGTD1 gene can be used for increasing the content of artemisinin, and is of great significance for providing high-yield and stable plant materials for large-scale production of the artemisinin.

The invention discloses a cloning method and application of an artemisia-apiacea AaMYC3 gene coded sequence. The cloning method includes the specific steps of cloning of a gene AaMYC3; constructing of a plant expression vector with the gene; the activation effect of the gene on a specific gene promoter of an artemisinin biosynthetic pathway. The nucleotide sequence of the artemisia-apiacea AaMYC3 gene is shown as SEQ ID NO.1, and the coded amino acid sequence is shown as SEQ ID NO.2. The invention further discloses the application of the AaMYC3 gene to activating expression of the four specific gene promoters including ADS, CYP71AV1, DBR2 and ALDH1 of the artemisinin biosynthetic pathway. According to the cloning method an application, the AaMYC3 gene can be applied to artemisia apiacea with the RNAi method, the antisense inhibiting method and the like, quality is improved, and the content of artemisinin in artemisia apiacea can be increased.

The invention provides a transgenic breeding method of sweet wormwood. The transgenic breeding method of sweet wormwood comprises the following steps: taking immature sweet wormwood inflorescence as an explant, infecting the explant by using an agrobacterium solution with exogenous genes, co-culturing the explant for 2-3 days, putting the explant on a selective-pressure culture medium to induce and generate a callus tissue, further inducing the callus tissue into a regeneration plant, then carrying out molecular biological detection on a reporter gene, and identifying a transgenic plant in the regeneration plant. According to the transgenic breeding method of sweet wormwood, the immature sweet wormwood inflorescence is used as the explants and is co-cultured with the agrobacterium EHA105 strains, so that a transformation rate is high; the highest transformation rate is 17.2% and is higher than that of the common leaf explant transgenic rate in the current sweet wormwood transgenosis by 8.59%. A novel transgenic system is provided for the genetic transformation of the sweet wormwood; meanwhile, the reference is provided for other plants difficult in agrobacterium-mediated transformation.

The invention discloses a method for cultivating sweet wormwood herb with high artemisinin content in flower buds by co-transforming Sps, Hmgr and Dxs genes, relating to the technical field of biology. The method comprises the following steps: cloning three genes namely Anti-Sps, Anti-Hmgr and Anti-Dxs genes from sweet wormwood herb, constructing a plant expression vector containing three genes namely the Sps, Hmgr and Dxs genes which are combined in pairs, performing mediation by using agrobacterium, transferring the three genes namely the Sps, Hmgr and Dxs genes into sweet wormwood herb, and cultivating and screening regenerated plants to obtain a transgenic sweet wormwood herb plant with increased artemisinin content in the flower buds. When the content of non-transformed comparison sweet wormwood herb is 6.20mg/g of dry weight, the maximum artemisinin content in the flower buds of an obtained gene engineering sweet wormwood herb plant disclosed by the invention is 12.10mg/g of dry weight, and the artemisinin content in the flower buds is 1.95 times of the content of non-transformed comparison sweet wormwood herb. The method disclosed by the invention has great significance in saving costs for pharmaceutical factories which take sweet wormwood herb as a raw material.

The invention relates to the field of biological technologies and provides a method for increasing content of artemisinin in Artemisia annua L. by genetic modification with CHI (chalcone Isomerase) genes. According to the method, the CHI genes are cloned from Artemisia annua L., a plant expression carrier containing the CHI genes is established, the CHI genes are mediated by agrobacterium tumefaciens to be transferred into Artemisia annua L. for regeneration of a plant, the integration condition of an exogenous target gene CHI is detected through the PCR (polymerase chain reaction), the content of artemisinin in transgenic Artemisia annua L. is detected through an HPLC-ELSD (high performance liquid chromatography-evaporative light scattering detector), and the transgenic Artemisia annua L. plant with the content of artemisinin increased is screened out. The content of artemisinin in transgenic Artemisia annua L. is increased and is 1.5 times that of a non-transgenic contrast plant in the highest level, and the method for increasing the content of artemisinin in Artemisia annua L. is provided and lays a foundation for large-scale production of artemisinin from transgenic Artemisia annua L..

The invention discloses a sturgeon pathogenic bacterium inhibitor and belongs to the technical field of sturgeon pathogenic breeding. The sturgeon pathogenic bacterium inhibitor comprises the following raw materials in parts by weight: 43-52 parts of sweet wormwood, 10-16 parts of oligopeptide fish dissolution powder, 7-10 parts of choline chloride, 20-28 parts of atractylodes macrocephala, 10-20parts of rhizoma polygonati, 30-35 parts of Baijiu, 0.1-0.3 part of EM (Effective Microorganism) bacteria, 10-15 parts of beer yeast and 10-15 parts of a liver protection agent. A preparation method comprises the following steps: I, preparing the raw materials according to the parts by weight; II, baking the sweet wormwood, fumigating and baking the atractylodes macrocephala and the rhizoma polygonati on the sweet wormwood, crushing into powder, collecting sweet wormwood ash, and coating with choline chloride so as to obtain chloride granules; III, mixing the beer yeast with the EM bacteria, leaving to stand for 3-5 days so as to obtain a bacterial material, and uniformly stirring the oligopeptide fish dissolution powder, the atractylodes macrocephala powder, the rhizoma polygonati powderand the liver protection agent so as to obtain a mixture; IV, coating the chloride granules with a bacterial material, and further coating the outermost layer with the mixture, thereby obtaining the sturgeon pathogenic bacterium inhibitor. The sturgeon pathogenic bacterium inhibitor disclosed by the scheme of the invention is capable of remarkably increasing the ratio of beneficial bacterium florae in intestinal tracts of sturgeon pathogenic.