CN112961870A - Carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof - Google Patents

Carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof Download PDF

Info

Publication number
CN112961870A
CN112961870A CN202110215836.3A CN202110215836A CN112961870A CN 112961870 A CN112961870 A CN 112961870A CN 202110215836 A CN202110215836 A CN 202110215836A CN 112961870 A CN112961870 A CN 112961870A
Authority
CN
China
Prior art keywords
dhcgt2
gene
glycosyltransferase
carbon
plant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110215836.3A
Other languages
Chinese (zh)
Other versions
CN112961870B (en
Inventor
郝冰
袁慧娟
张广辉
杨生超
刘祥宇
谢家伟
陈小巧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yunnan Agricultural University
Original Assignee
Yunnan Agricultural University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yunnan Agricultural University filed Critical Yunnan Agricultural University
Priority to CN202110215836.3A priority Critical patent/CN112961870B/en
Publication of CN112961870A publication Critical patent/CN112961870A/en
Application granted granted Critical
Publication of CN112961870B publication Critical patent/CN112961870B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N9/00Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
    • C12N9/10Transferases (2.)
    • C12N9/1048Glycosyltransferases (2.4)
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09Recombinant DNA-technology
    • C12N15/63Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
    • C12N15/70Vectors or expression systems specially adapted for E. coli
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P17/00Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms
    • C12P17/16Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms containing two or more hetero rings
    • C12P17/162Heterorings having oxygen atoms as the only ring heteroatoms, e.g. Lasalocid
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Genetics & Genomics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Biotechnology (AREA)
  • General Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Microbiology (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Plant Pathology (AREA)
  • Biophysics (AREA)
  • Physics & Mathematics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Enzymes And Modification Thereof (AREA)

Abstract

The invention relates to a carbon glycosyltransferase in a pseudo-ginseng plantDhCGT2Genes and application thereof, belonging to the field of biotechnology. The carbon glycosyltransferase in the Vietnamese plantDhCGT2The gene nucleotide sequence is shown as SEQ ID NO.1, and the total length of the sequence is 1422 bp; the amino acid sequence of the encoded protein is shown as SEQ ID NO.2, 473 amino acid residues are encoded, and the encoded protein can be used for preparing schaftoside and isoschaftoside. The invention discovers a carbon sugar in desmodium plant false pachyrhizus for the first timeThe transferase has the functions of catalyzing the generation of vitexin and isovitexin by taking dihydroxynaringenin as a substrate and catalyzing the generation of schaftoside and isoschaftoside by taking dihydroxynaringenin glucosylcarbinoside as a substrate, and provides a high-efficiency biosynthesis method for heterogeneously expressing vitexin, isovitexin, schaftoside and isoschaftoside in a plant body.

Description

Carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof
Technical Field
The invention belongs to the technical field of biology, and particularly relates to a carbon glycosyltransferase DhC GT2 gene in a pseudo-ginseng plant and application thereof in preparation of vitexin, isovitexin, schaftoside and isoschaftoside.
Background
The medicinal plant Desmodium herbaceum (L.) DC is Desmodium (L.) of Desmodium of Leguminosae, and is distributed at home and abroad, and China is mainly distributed in Yunnan and Guangdong and other areas. The whole herb of herba Psidii Guajavae has the effects of relieving pain, clearing heat, promoting urination, diminishing inflammation, calming the liver, removing toxic substances, promoting blood circulation, relieving cough and asthma. According to records of Chinese materia medica, the pseudo-ginseng has obvious effect on treating epidemic encephalitis B, hepatitis and parotitis. The herba Viburni Sargentii mainly contains flavonoid glycoside, alkaloid, terpenes, etc., and has high medicinal and feeding values. The related literature reports that schaftoside and isoschaftoside are natural products with biological activity widely existing in high-grade plants such as food crops and Chinese herbal medicines. Their biosynthesis may be linked to plant defense. They have a variety of biological activities in mammals, including anti-respiratory virus, anti-diabetic, anti-hypertensive, hepatoprotective, anti-inflammatory and antioxidant activities, which implicate their potential use as pharmaceuticals or dietary supplements.
Currently, studies on Oxygen Glycosyltransferases (OGTs) are widespread, but there is less interest in Carbon Glycosyltransferases (CGTs). In recent years, the flavonoid carbon glycoside attracts scientific researchers to pay extensive attention to CGTs through remarkable pharmacological activity and a stable structure which is not easy to hydrolyze. At present, the CGT gene is found to be mainly in 14 monocotyledons and dicotyledons such as rice, corn, wheat, mango, kudzu root, gentiana trilobata, kumquat, mandarin orange, dendrobium, horseradish, glycyrrhiza glabra, aloe, scutellaria baicalensis, trollflower and the like. Most CGT in the plant can catalyze 2-hydroxyflavanone to generate C-glycosylation to generate 6-and 8-single-carbon glycoside of corresponding flavone in one step, such as vitexin, isovitexin, puerarin, erythroside and isoerythroside. At present, only SbCGTb in the scutellaria baicalensis can generate glycosylation reactions in two steps to generate the dicarboglycoside schaftoside and isoschaftoside. The research on the key enzyme CGTs in the biosynthesis pathway of the flavonoid carbon glycoside in the medicinal plant pseudo-ginseng has not been reported.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a carbon glycosyltransferase DhCGT2 gene in a pseudo-ginseng plant, which can be used as a biosynthesis regulation gene of vitexin, isovitexin, schaftoside and isoschaftoside and applied to preparation of vitexin, isovitexin, schaftoside and isoschaftoside.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides a carbon glycosyltransferase DhCGT2 gene in a pseudo-kidney bean plant, wherein the nucleotide sequence of the carbon glycosyltransferase DhCGT2 gene in the pseudo-kidney bean plant is shown in SEQ ID NO.1, and the full length of the sequence is 1422 bp.
In a second aspect, the present invention provides a protein encoded by the gene DhCGT2, which is a carbon glycosyltransferase from the above-mentioned plants of Phaseolus vulgaris, wherein the amino acid sequence of the encoded protein is shown in SEQ ID NO.2, and 473 amino acid residues are encoded.
In a third aspect, the present invention provides a recombinant plasmid containing a target gene in the gene DhCGT2 which is a carbon glycosyltransferase in the above-described pseudo-ginseng plant.
Further, it is preferable that the gene DhCGT2 of the c-glycosyltransferase of pseudo-beans is homologously recombined with the vector pET28a to obtain a recombinant plasmid pET28a-DhCGT 2.
Specifically, in the case of homologous recombination with the vector pET28a, the DhCGT2 gene needs to be amplified and recovered using a primer having a homologous wall as follows:
5'F:cagcaaatgggtcgcggatcccgatgaagaaagcagcacggc;(SEQ ID NO.3)
3'R:tggtggtgctcgagtgcggcccgcaattacgaggatacttgattcattatataatcaatg。(SEQ ID NO.4)
the fourth aspect of the invention provides a genetically engineered bacterium, which contains the recombinant plasmid, or integrates the exogenous carbon glycosyltransferase DhCGT2 gene into the genome of the genetically engineered bacterium.
Further, preferably, the genetically engineered bacterium is escherichia coli BL21DE 3.
The fourth aspect of the invention provides the application of the carbon glycosyltransferase DhCGT2 gene in the pseudolarix plants in preparing schaftoside and isoschaftoside.
Further, it is preferable that the carbon glycosyltransferase DhCGT2 encoded by the carbon glycosyltransferase DhCGT2 can catalyze the production of a flavone C-glycoside compound by using dihydroxynaringenin (2-hydroxynaringenin) as a substrate and UDP-glucose and UDP-arabinose as sugar donors. The first step of carbon glycosylation reaction is to connect glucose on C-6 position or C-8 position of dihydroxynaringenin to generate vitexin or isovitexin, and the second step of glycosylation reaction is to generate vitexin or isovitexin as substrate to connect arabinose on C-6 position or C-8 position to generate schaftoside or isoschaftoside.
The invention obtains target protein after in vitro expression through recombinant plasmid, further catalyzes substrate dihydroxynaringenin, generates vitexin or isovitexin through a first glycosylation reaction, and generates schaftoside or isoschaftoside through a second glycosylation reaction by taking a product generated by the first reaction as a substrate for further glycosylation reaction.
The gene DhCGT2 of the carbon glycosyltransferase is extracted from the plant root of the pseudo-ginseng, analyzed by transcriptome sequencing and bioinformatics technology, and identified after being screened after a large number of tests; extracting the RNA of the pseudo-jatropha root by adopting an RNA kit, inverting the RNA into cDNA, and performing PCR amplification to obtain the DNA. The amplification primers of the gene DhCGT2 of the carbon glycosyltransferase are shown as follows:
5'F:atgaagaaagcagcacggc;(SEQ ID NO.5)
3'R:ttacgaggatacttgattcattatataatcaatg。(SEQ ID NO.6)
the carbon glycosyltransferase DhCGT2 separated and identified from the pseudo-ginseng can be used as an important candidate gene for producing schaftoside and isoschaftoside which is also an inhibitor for seed germination of parasitic plant striga asiatica.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a carbon glycosyltransferase DhCGT2 gene in a pseudo-ginseng plant, which can be used as a biosynthesis regulation gene of schaftoside and isoschaftoside and applied to preparation of schaftoside and isoschaftoside. The invention relates to a method for preparing vitexin, isovitexin, schaftoside and isoschaftoside by using in-vitro biological heterologous expression, which solves the problem of extracting a short plate of vitexin, isovitexin, schaftoside and isoschaftoside by using wild medicinal plant resources.
Drawings
FIG. 1 is a schematic diagram of the derivation of vitexin, isovitexin, schaftoside and isoschaftoside;
FIG. 2 is a key diagram of the synthesis of schaftoside and isoschaftoside by presuming the CGT catalytic reaction;
FIG. 3 is a schematic diagram of the construction of recombinant expression plasmid pET28a-DhCGT2 (for expressing the gene of carbon glycosyltransferase DhCGT 2);
FIG. 4 shows the electrophoretic detection of DhCGT2 after recombination; m: NormalRunTM prestaged 250bp-I/II DNA ladder DNA Marker (250bp-I/II nucleic acid Marker); 1: recombining a target gene;
FIG. 5 is an SDS-PAGE protein electrophoretic detection map of DhCGT 2; wherein, M: protein molecular mass standard; 1 is the target protein electrophoresis detection of DhCGT2 without nickel column purification; 2, SDS-PAGE protein electrophoresis detection of the DhCGT2 protein purified by the nickel column; arrow indicates the purification of the target protein;
FIG. 6 shows the result of HPLC detection of the enzyme-activated reaction product of carbon glycosyltransferase DhCGT 2; i represents a liquid phase classification chart of 4 compound mixed standard products; II, a liquid phase detection diagram of an enzyme reaction blank control test; III is a liquid phase detection map of DhCGT2 which takes dihydroxynaringenin as a substrate and takes UDP-glucose as enzyme provided by sugar to generate flavone monosaccharide vitexin and isovitexin; IV, reacting DhCGT1 with enzyme provided by dihydroxynaringenin and UDP-glucose and UDP-arabinoside 2 to generate flavone disaccharide schaftoside and isoschaftoside;
FIG. 7 shows the results of LC-MS detection of the standard; the I is LC-MS detection mixed standard vitexin, isovitexin, schaftoside and isoschaftoside maps; wherein II, III, IV and V are LC-MS extraction spectra of the molecular weight of the standard substance; wherein a: charaftoside; b: isoureafur carbon glycoside; c: vitexin; d: isovitexin;
FIG. 8 shows the results of LC-MS detection of the reaction product; the I is a detection result of LC-MS detecting DhCGT2 to generate flavone monosaccharide and disaccharide vitexin, isovitexin, schaftoside and isoschaftoside through enzymatic reaction provided by dihydroxynaringenin and UDP-glucose and UDP-arabinosine 2 sugars; wherein II, III, IV and V are molecular weight maps of 4 compounds extracted from enzyme reaction, a: charaftoside; b: isoureafur carbon glycoside; c: vitexin; d: isovitexin;
FIG. 9 shows the first glycosylation step of C-6 or C-8 catalyzed dihydroxynaringenin (2-hydroxynaringenin) by the carboglycosyltransferase DhCGT1 and the second glycosylation step of carbon on the hydroxyl groups at the C-6 and C-8 positions with vitexin or isovitexin;
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.
Example 1
Based on the basic function annotation information of the Candida Unigene, CGT candidate genes are screened from the sequencing annotation result, meanwhile, the genes of the carbon glycosyl transferase (TcCGT1) identified from the trollius chinensis plant and the carbon glycosyl transferase (Ggcgt) in Glycyrrhiza glabra are taken as clues, the screening result is subjected to sorting analysis through sequence local BLAST, and finally 11 CGT type carbon glycosyl transferases (TcCGT) are found. Then, after a series of work such as cDNA preparation, candidate gene amplification and recovery, homologous recombination, protein expression, in vitro enzyme activity reaction, HPLC (high performance liquid chromatography) and LC/MS (liquid chromatography/mass spectrometry) detection and the like, the target candidate carbon glycosyltransferase DhCGT2 gene which can catalyze C-6 or C-8 site of the dihydroxynaringenin to generate vitexin or isovitexin is finally identified (figure 1). The synthetic steps of schaftoside and isoschaftoside in each stage are as follows:
(1) preparation of cDNA template
Taking a fresh leaf sample of the tonka-bean, quickly freezing by using liquid nitrogen, and extracting RNA. Total RNA extraction was performed using the HiPure Plant RNA Mini Kit from magenta (Meyki Biotech, Guangzhou). Extracting RNA according to the operation steps of the kit, after the RNA is detected to be qualified, using a TAKARA reverse transcription kit to reversely transcribe the RNA into cDNA, and storing at-20 ℃ for later use.
(2) Gene amplification and recovery
The primers with homologous arms of the gene (the homologous arms are Escherichia coli pET28a) are designed by using primer design software Snapgene3.2.1, and then gene amplification is carried out by using Q5 high fidelity enzyme. The PCR reaction program is: at 98 ℃ for 30S; at 98 deg.C, 10S, 58 deg.C, 30S, 72 deg.C, 50min, 35 cycles; 72 deg.C, 2 min. The PCR system amplification system is shown in Table 1, and after the PCR is finished, the target band is recovered after the glue running confirms the successful amplification.
Then adopting the primers shown in SEQ ID NO.3 and SEQ ID NO.4 to carry out PCR reaction, wherein the PCR reaction program comprises the following steps: at 98 ℃ for 30S; at 98 deg.C, 10S, 58 deg.C, 30S, 72 deg.C, 50min, 35 cycles; 72 deg.C, 2 min. The primers shown in SEQ ID NO.3 and SEQ ID NO.4 are adopted to carry out PCR system amplification system shown in Table 2, after PCR is finished, the gel is run to confirm that amplification is successful, and then target strips are recovered to obtain the gene segments with homologous arms.
Gene cutting recovery Using EasyPure Quick Gel Extraction Kit from Beijing all-terrain gold Biotechnology Ltd, recovery of the target gene was performed. After recovery, the concentration of the recovered water is measured on a NanoReady ultramicro ultraviolet-visible spectrophotometer, and finally the water is stored in a refrigerator at the temperature of-20 ℃ for later use.
5'F:atgaagaaagcagcacggc;(SEQ ID NO.5)
3'R:ttacgaggatacttgattcattatataatcaatg。(SEQ ID NO.6)
TABLE 1
Components Gene amplification System. mu.L
Q5 high fidelity enzyme 25
5'F(SEQ ID NO.5)10μmol/L 1
3'R(SEQ ID NO.6)10μmol/L 1
cDNA 1
ddH2O to 50μL
TABLE 2
Figure BDA0002953056320000051
Figure BDA0002953056320000061
The primers with homology arms were as follows:
5'F:cagcaaatgggtcgcggatcccgatgaagaaagcagcacggc;(SEQ ID NO.3)
3'R:tggtggtgctcgagtgcggcccgcaattacgaggatacttgattcattatataatcaatg。(SEQ ID NO.4)
(3) construction and identification of Gene recombination vector
A schematic representation of homologous recombination is shown in detail in FIG. 3. The vector pET28a was first linearized, and the linearized vector was obtained by double digestion with BamH I enzyme and Not1 at 37 ℃ for 40min on a PCR instrument as shown in Table 3. Assembling according to the operation instruction of homologous recombinase during homologous recombination, and then calculating the use amount of each component according to the concentrations of the inserted gene segment and the vector and the recombination instruction; finally, the components were added to the PCR reaction tube on ice as in Table 4. The homologous recombination PCR reaction program is as follows: at 98 ℃ for 30S; at 98 deg.C, 10S, 58 deg.C, 30S, 72 deg.C, 50min, 35 cycles; 72 deg.C, 2 min. The results were examined after assembly and sent to the company for sequencing, and the results of electrophoresis after assembly are shown in FIG. 4, indicating successful assembly. The recombination operation is carried out according to the following processes:
TABLE 3 digestion system
Components mu.L of enzyme digestion reaction system
pET28a X
Buffer 5
BamH I 2
Not1 2
ddH2O to 50μL
Wherein the concentration of extracted plasmid X is 1000/pET28a
TABLE 4 candidate Gene recombination reaction System
Components Recombination reaction μ L
Linearized pET28a X
Gene fragment with homology arm Y
CE II Buffer 4
Exnase II 2
ddH2O to 20μL
Wherein X ═ (0.02 × pET28a base pairs) ng/linearized pET28a concentration ng/μ L; y ═ (base pair 0.02 × pET28a) ng/DhCGT2 recovery concentration ng/. mu.l;
(4) SDS-PAGE protein electrophoresis and immunoblot detection
After being determined by a protein expression small test, the protein is amplified and expressed, and the induction conditions of the DhCGT2 protein are as follows: inducing at 16 deg.C with 0.1mM IPTG at 220r/min for 18 h; using a Pet28a empty vector without the target gene as a control test; after induction, shaking greatly, collecting bacteria (4 ℃, 5000rpm), breaking cell wall, centrifuging (4 ℃, 3600rpm) to obtain protein supernatant, purifying by 80mM imidazole eluting nickel column, concentrating, and performing SDS-PAGE protein electrophoresis and detection. As shown in FIG. 5, the target gene DhCGT2 has a band at the position corresponding to the protein Marker50KD, while the control experiment shows that the target band is found, thereby preliminarily confirming that the gene DhCGT2 is successfully expressed.
(5) Enzyme activity reaction
The activity of the DhCGT2 enzyme was determined by the synthesis of schaftoside and isoschaftoside by carboglycosylation in 200ul centrifuge tubes. The mixture in the reaction system comprises: 40. mu.g of purified recombinant protein DhCGT2 was added to 20mM dihydroxynaringenin, 100mM UDP-glucose, 100mM UDP-arabinose, and 80mM Tris-hcl buffer (pH7.5), and the total volume of the reaction system was 100. mu.L. After 12 hours of incubation at 30 ℃ the reaction was stopped with 100ul of methanol, followed by brief centrifugation and supernatant was taken. Detection of the reaction product was performed by HPLC and LC-MS analysis.
(6) Product detection
The HPLC detection conditions were as follows:
the HPLC detection instrument is an Agilent 1290 ultra-high performance liquid chromatograph. The chromatographic column is ACE AQC-18column (250mm × 4.6mm, 5um), and the schaftoside and isoschaftoside mobile phase are determined to be formic acid aqueous solution (B) -methanol (C) -acetonitrile (D) with the volume concentration of 0.01% for gradient elution: 0-5 min, 90% B-10% D; 5-10 min, 82% of B-18% of D; 10-17 min, 80% B-20% C; 17-37 min, 55% B-45% C; 37-47 min, 45% B-55% C; the sample amount is 20ul, the detection wavelength is 260nm, the flow rate is 0.4ml/min, the column temperature is 25 ℃, the detector is a diode array detector, the detection result is shown in figure 7, the peak time of the product of the DhCGT2 enzyme reaction is consistent with the peak time of the standard vitexin, isovitexin, schaftoside and isoschaftoside, and the generation of flavone C-glycoside compound monosaccharide and disaccharide is preliminarily determined.
The LC-MS detection conditions were as follows:
to further confirm the reaction products detected by HPLC, Agilent 1290UPLC/6540Q-TOF liquid chromatography mass spectrometer (LC/MS) was used for detection as follows: mass spectrum conditions: the ion source adopts a positive ion mode, and the voltage: 3500V; fragmentation voltage: 135V; taper hole voltage: 60V; radio frequency voltage: 750V, scanning range: 100-1000 m/z. Chromatographic conditions are as follows: the chromatographic column is ACE AQ C-18column (250mm is multiplied by 4.6mm, 5um), and the schaftoside and the isoschaftoside are determined to be eluted by formic acid aqueous solution (B) -methanol (C) -acetonitrile (D) with the volume concentration of 0.01 percent in a gradient way: 0-5 min, 90% B-10% D; 5-10 min, 82% of B-18% of D; 10-17 min, 80% B-20% C; 17-37 min, 55% B-45% C; 37-47 min, 45% B-55% C; the detection wavelength is 260nm, the flow rate is 0.4ml/min, the column temperature is 25 ℃, the detector is a diode array detector, the detection result is shown in figures 7 and 8, figure 7 is a standard LC-MS spectrum, and figure 8 is an LC-MS spectrum of the target gene enzyme activity reaction. As can be seen from the results, the peak-out time and characteristic peaks of the reaction product are compared with the standard vitexin and isovitexin; the peak emergence times of schaftoside and isoschaftoside are matched with the results of characteristic peaks, the generated products are further confirmed to be schaftoside and isoschaftoside, and the correctness of earlier guess is further verified, as shown in fig. 9, DhCGT1 can catalyze dihydroxynaringenin to react to generate vitexin, isovitexin, schaftoside and isoschaftoside.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
SEQ ID NO.1
Figure BDA0002953056320000081
Figure BDA0002953056320000092
SEQ ID NO.2
Figure BDA0002953056320000091
Figure BDA0002953056320000101
Sequence listing
<110> Yunnan university of agriculture
<120> carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof
<160> 6
<170> SIPOSequenceListing 1.0
<210> 1
<211> 1422
<212> DNA
<213> Artificial sequence ()
<400> 1
atgaagaaag cagcacggct tgtattcatc cctgcaccgg gagttggtca tcttgtgtcc 60
accattgagt tcgcaaagct tctaacaaat catgatcaaa atctctggat aactatattc 120
ttaatcaaac taccatttga taccacaacc tctacttaca cagaatccct agtttccttc 180
tccgaccgtg tggagatcat acaactccct gaaattatct ccaatgaccc aaaaccaacc 240
ttcgctatcc tccacctaca gaaaccaaac gtcaaagaag ccgtctcaaa actcacacct 300
actccgccac tggcagcctt cgtcgtcgac atgttctgca ccaccatgat tgaagtcgct 360
aaagagttga aggtcccttc actcgtcttc ttcacctcag atgtatcctt cctgggtgtg 420
gtccttcatc ttcacacgct tcgtgaacaa gacagcactc aattcagaga ctcccaaact 480
gagttctcca gccccgtttt tagcaacccg ctcccttcca catctttgcc tactgtcgcc 540
atcagcaagg aatgggactc tattttcttg gactacggga aaggcctcaa ggaagccgat 600
ggcattatcg taaattcatt ccaagagctc gaatcccatg cggttcactc attctctaag 660
gtggactcac gtttacctat ttatccggtt gggcccataa taaacctcaa gcccaaggcc 720
catgtcgaga gtgatgacac tgtcactgat atcctcaact ggcttgataa tcaacctcct 780
tcctcggtag tattcctgtg ctttgggagc atgggttctt ttcgtgagga acaggttagg 840
gagattgcgc atgctcttga gaatagcaag gcccggttct tgtgggccct acgaaaatcc 900
ccaccaaagg attccaagtt tttgatttct ccctctgaat atcttccctc cgaattggct 960
caagttttac cccaaggctt cttagatcgg acggctgaca tcggaaaggt cattggatgg 1020
gcccctcaga cccaagtact ggcccatcca tccacggcag gctttgtttc gcactgcggc 1080
tggaactcta ccctcgagag catatatttt ggtgttcccg ttgccacgtg gccgctttac 1140
gctgaacaac agaccaatgc atttttattg gtgcgtgagt tgaagattgc tgtggagatt 1200
tccttggatt ataaggtcga ctttaaaggt gaatctaaca ctcttttgag tgctgacaaa 1260
attgaaaaag gaatcaggag tctgctggac atggatgaag acacacgaaa gagagttaag 1320
gaaatgagtg aaaagagtaa gacgacttta ttggaaggtg gttgttccta ctctcattta 1380
cgacgtctca ttgattatat aatgaatcaa gtatcctcgt aa 1422
<210> 2
<211> 473
<212> PRT
<213> Artificial sequence ()
<400> 2
Met Lys Lys Ala Ala Arg Leu Val Phe Ile Pro Ala Pro Gly Val Gly
1 5 10 15
His Leu Val Ser Thr Ile Glu Phe Ala Lys Leu Leu Thr Asn His Asp
20 25 30
Gln Asn Leu Trp Ile Thr Ile Phe Leu Ile Lys Leu Pro Phe Asp Thr
35 40 45
Thr Thr Ser Thr Tyr Thr Glu Ser Leu Val Ser Phe Ser Asp Arg Val
50 55 60
Glu Ile Ile Gln Leu Pro Glu Ile Ile Ser Asn Asp Pro Lys Pro Thr
65 70 75 80
Phe Ala Ile Leu His Leu Gln Lys Pro Asn Val Lys Glu Ala Val Ser
85 90 95
Lys Leu Thr Pro Thr Pro Pro Leu Ala Ala Phe Val Val Asp Met Phe
100 105 110
Cys Thr Thr Met Ile Glu Val Ala Lys Glu Leu Lys Val Pro Ser Leu
115 120 125
Val Phe Phe Thr Ser Asp Val Ser Phe Leu Gly Val Val Leu His Leu
130 135 140
His Thr Leu Arg Glu Gln Asp Ser Thr Gln Phe Arg Asp Ser Gln Thr
145 150 155 160
Glu Phe Ser Ser Pro Val Phe Ser Asn Pro Leu Pro Ser Thr Ser Leu
165 170 175
Pro Thr Val Ala Ile Ser Lys Glu Trp Asp Ser Ile Phe Leu Asp Tyr
180 185 190
Gly Lys Gly Leu Lys Glu Ala Asp Gly Ile Ile Val Asn Ser Phe Gln
195 200 205
Glu Leu Glu Ser His Ala Val His Ser Phe Ser Lys Val Asp Ser Arg
210 215 220
Leu Pro Ile Tyr Pro Val Gly Pro Ile Ile Asn Leu Lys Pro Lys Ala
225 230 235 240
His Val Glu Ser Asp Asp Thr Val Thr Asp Ile Leu Asn Trp Leu Asp
245 250 255
Asn Gln Pro Pro Ser Ser Val Val Phe Leu Cys Phe Gly Ser Met Gly
260 265 270
Ser Phe Arg Glu Glu Gln Val Arg Glu Ile Ala His Ala Leu Glu Asn
275 280 285
Ser Lys Ala Arg Phe Leu Trp Ala Leu Arg Lys Ser Pro Pro Lys Asp
290 295 300
Ser Lys Phe Leu Ile Ser Pro Ser Glu Tyr Leu Pro Ser Glu Leu Ala
305 310 315 320
Gln Val Leu Pro Gln Gly Phe Leu Asp Arg Thr Ala Asp Ile Gly Lys
325 330 335
Val Ile Gly Trp Ala Pro Gln Thr Gln Val Leu Ala His Pro Ser Thr
340 345 350
Ala Gly Phe Val Ser His Cys Gly Trp Asn Ser Thr Leu Glu Ser Ile
355 360 365
Tyr Phe Gly Val Pro Val Ala Thr Trp Pro Leu Tyr Ala Glu Gln Gln
370 375 380
Thr Asn Ala Phe Leu Leu Val Arg Glu Leu Lys Ile Ala Val Glu Ile
385 390 395 400
Ser Leu Asp Tyr Lys Val Asp Phe Lys Gly Glu Ser Asn Thr Leu Leu
405 410 415
Ser Ala Asp Lys Ile Glu Lys Gly Ile Arg Ser Leu Leu Asp Met Asp
420 425 430
Glu Asp Thr Arg Lys Arg Val Lys Glu Met Ser Glu Lys Ser Lys Thr
435 440 445
Thr Leu Leu Glu Gly Gly Cys Ser Tyr Ser His Leu Arg Arg Leu Ile
450 455 460
Asp Tyr Ile Met Asn Gln Val Ser Ser
465 470
<210> 3
<211> 42
<212> DNA
<213> Artificial sequence ()
<400> 3
cagcaaatgg gtcgcggatc ccgatgaaga aagcagcacg gc 42
<210> 4
<211> 60
<212> DNA
<213> Artificial sequence ()
<400> 4
tggtggtgct cgagtgcggc ccgcaattac gaggatactt gattcattat ataatcaatg 60
<210> 5
<211> 19
<212> DNA
<213> Artificial sequence ()
<400> 5
atgaagaaag cagcacggc 19
<210> 6
<211> 34
<212> DNA
<213> Artificial sequence ()
<400> 6
ttacgaggat acttgattca ttatataatc aatg 34

Claims (8)

1. Carbon glycosyltransferase in pseudo-ginseng plantDhCGT2A gene characterized by a carbon glycosyltransferase in a plant of pseudo-ginsengDhCGT2The gene nucleotide sequence is shown in SEQ ID NO. 1.
2. The c-glycosyltransferase of the pseudo-ginseng plant of claim 1DhCGT2The coding protein of the gene is characterized in that the amino acid sequence of the coding protein is shown as SEQ ID NO. 2.
3. A plant-medium carbon glycosyltransferase comprising the pseudolarix kawakamii of claim 1DhCGT2Recombinant plasmid of target gene in gene.
4. The c-glycosyltransferase of claim 3 of a plant containing pseudo-ginsengDhCGT2A recombinant plasmid of a target gene among genes, characterized in that a c-glycosyltransferase of Vicia faba is introducedDhCGT2The gene and pET28a vector homologous recombination, obtain pET28a-DhCGT2 recombinant plasmid.
5. A genetically engineered bacterium comprising the recombinant plasmid of claim 1, or having the carbon-glycosyltransferase of claim 1 incorporated into the genome of the genetically engineered bacteriumDhCGT2A gene.
6. The genetically engineered bacterium of claim 5, wherein the genetically engineered bacterium is Escherichia coli BL21DE 3.
7. The c-glycosyltransferase of the pseudo-ginseng plant of claim 1DhCGT2The gene is used in preparing vitexin, isovitexin, schaftoside and isoschaftoside.
8. The c-glycosyltransferase of claim 7 in a pseudo-ginseng plantDhCGT2The application of the gene in preparing vitexin, isovitexin, schaftoside and isoschaftoside is characterized in that: dihydroxynaringenin is used as a substrate, UDP-glucose and UDP-arabinose are used as sugar donors, and the carbon glycosyl transferase is usedDhCGT2The carbon glycosyltransferase DhCGT2 obtained by gene coding can catalyze to generate a flavone carbon glycoside compound;
the first step of carbon glycosylation reaction is to connect glucose on C-6 position or C-8 position of dihydroxynaringenin to generate vitexin or isovitexin, and the second step of glycosylation reaction is to generate vitexin or isovitexin as substrate to connect arabinose on C-6 position or C-8 position, thereby generating schaftoside or isoschaftoside.
CN202110215836.3A 2021-02-26 2021-02-26 Carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof Active CN112961870B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110215836.3A CN112961870B (en) 2021-02-26 2021-02-26 Carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110215836.3A CN112961870B (en) 2021-02-26 2021-02-26 Carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof

Publications (2)

Publication Number Publication Date
CN112961870A true CN112961870A (en) 2021-06-15
CN112961870B CN112961870B (en) 2022-08-16

Family

ID=76275984

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110215836.3A Active CN112961870B (en) 2021-02-26 2021-02-26 Carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof

Country Status (1)

Country Link
CN (1) CN112961870B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110713962A (en) * 2019-09-06 2020-01-21 南京农业大学 Genetic engineering bacterium for high-yield production of malonyl coenzyme A and construction method and application thereof
CN112961870B (en) * 2021-02-26 2022-08-16 云南农业大学 Carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof
CN116179504A (en) * 2023-03-08 2023-05-30 中国科学院华南植物园 Desmodium styracifolium carboglycosyltransferase and application of encoding gene thereof

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006013530A1 (en) * 2004-07-29 2006-02-09 The University Of Stellenbosch A process of producing rooibos tea extract
CN104758534A (en) * 2015-04-29 2015-07-08 赵振荣 Medicine for treating osteoporosis and preparing method thereof
CN104800687A (en) * 2015-05-21 2015-07-29 霍玉莲 Traditional Chinese medicine preparation for treating infantile malnutrition and preparation method thereof
CN105941891A (en) * 2016-05-30 2016-09-21 中国热带农业科学院热带生物技术研究所 East caucasian tur feed additive, and preparation method and application thereof
CN106754989A (en) * 2016-12-21 2017-05-31 广东药科大学 The hydroxylase of strophanthus divaricatus flavanones 2 and its encoding gene and application
US20200069758A1 (en) * 2018-08-31 2020-03-05 Normaphar Sa Composition for use in the preventive and/or curative treatment of non-alcoholic fatty liver disease
CN111386342A (en) * 2017-10-03 2020-07-07 三得利控股株式会社 Transformed plant having blue flower color and method for producing same
CN112391398A (en) * 2020-11-30 2021-02-23 青岛市农业科学研究院 Apple flavone ketotransferase gene MdGT1 and application thereof
CA3149161A1 (en) * 2019-10-01 2021-04-08 Suntory Holdings Limited Buckwheat-derived c-glycosyltransferase gene and utilization thereof
CN112813084A (en) * 2021-02-26 2021-05-18 云南农业大学 Carbon glycosyltransferase DhCGT1 gene in pseudo-ginseng plant and application thereof
CN113136373A (en) * 2020-01-20 2021-07-20 中国科学院分子植物科学卓越创新中心 Novel carbon glycoside glycosyltransferase and application thereof
CN113265433A (en) * 2020-02-17 2021-08-17 中国科学院分子植物科学卓越创新中心 Bifunctional carbon glycoside glycosyl transferase and application thereof
CN113322288A (en) * 2020-02-28 2021-08-31 中国科学院分子植物科学卓越创新中心 Novel flavone hydroxylase, microorganism for synthesizing flavone C-glycosides and application thereof
CN113544276A (en) * 2018-12-06 2021-10-22 瓦赫宁根大学 Method for genetically modifying the NIN gene of plants in response to cytokinins

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112961870B (en) * 2021-02-26 2022-08-16 云南农业大学 Carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006013530A1 (en) * 2004-07-29 2006-02-09 The University Of Stellenbosch A process of producing rooibos tea extract
CN104758534A (en) * 2015-04-29 2015-07-08 赵振荣 Medicine for treating osteoporosis and preparing method thereof
CN104800687A (en) * 2015-05-21 2015-07-29 霍玉莲 Traditional Chinese medicine preparation for treating infantile malnutrition and preparation method thereof
CN105941891A (en) * 2016-05-30 2016-09-21 中国热带农业科学院热带生物技术研究所 East caucasian tur feed additive, and preparation method and application thereof
CN106754989A (en) * 2016-12-21 2017-05-31 广东药科大学 The hydroxylase of strophanthus divaricatus flavanones 2 and its encoding gene and application
CN111386342A (en) * 2017-10-03 2020-07-07 三得利控股株式会社 Transformed plant having blue flower color and method for producing same
US20200069758A1 (en) * 2018-08-31 2020-03-05 Normaphar Sa Composition for use in the preventive and/or curative treatment of non-alcoholic fatty liver disease
CN113544276A (en) * 2018-12-06 2021-10-22 瓦赫宁根大学 Method for genetically modifying the NIN gene of plants in response to cytokinins
CA3149161A1 (en) * 2019-10-01 2021-04-08 Suntory Holdings Limited Buckwheat-derived c-glycosyltransferase gene and utilization thereof
CN113136373A (en) * 2020-01-20 2021-07-20 中国科学院分子植物科学卓越创新中心 Novel carbon glycoside glycosyltransferase and application thereof
CN113265433A (en) * 2020-02-17 2021-08-17 中国科学院分子植物科学卓越创新中心 Bifunctional carbon glycoside glycosyl transferase and application thereof
CN113322288A (en) * 2020-02-28 2021-08-31 中国科学院分子植物科学卓越创新中心 Novel flavone hydroxylase, microorganism for synthesizing flavone C-glycosides and application thereof
CN112391398A (en) * 2020-11-30 2021-02-23 青岛市农业科学研究院 Apple flavone ketotransferase gene MdGT1 and application thereof
CN112813084A (en) * 2021-02-26 2021-05-18 云南农业大学 Carbon glycosyltransferase DhCGT1 gene in pseudo-ginseng plant and application thereof

Non-Patent Citations (10)

* Cited by examiner, † Cited by third party
Title
ABDULLAH AL HASAN 等: "Antimicrobial, Cytotoxic and Antioxidant Activities of Desmodium heterocarpon", 《BANGLADESH PHARMACEUTICAL JOURNAL》 *
G. H. SNYDER 等: "Agronomic and Economic Response of Three Tropical Legumes to Lime and Phosphorus in an Acid Infertile Spodosol", 《AGRON. J.》 *
G.H.SNYDER 等: "热带豆科牧草种植和生产", 《第十四届国际草地会议论文集》 *
NCBI: "PREDICTED: Vigna angularis anthocyanidin 3-O-glucosyltransferase 2-like (LOC108337121),mRNA", 《GENBANK DATABASE》 *
NCBI: "putative UDP-glucose flavonoid 3-O-glucosyltransferase 3 [Spatholobus suberectus]", 《GENBANK DATABASE》 *
刘美静等: "夏佛塔苷对高脂饮食诱导小鼠非酒精性脂肪肝的保护作用", 《中华中医药杂志》 *
唐湘梧等: "常见热带牧草和饲料作物拉汉名录", 《草原与草坪》 *
烟草和烟气中酚类物质检测技术研究进展: "者为 等", 《云南化工》 *
邓会群等: "天然产物的C-糖基化研究进展", 《生物技术通报》 *
黄钟碧 等: "假地豆的化学成分", 《中国实验方剂学杂志》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110713962A (en) * 2019-09-06 2020-01-21 南京农业大学 Genetic engineering bacterium for high-yield production of malonyl coenzyme A and construction method and application thereof
CN112961870B (en) * 2021-02-26 2022-08-16 云南农业大学 Carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof
CN116179504A (en) * 2023-03-08 2023-05-30 中国科学院华南植物园 Desmodium styracifolium carboglycosyltransferase and application of encoding gene thereof
CN116179504B (en) * 2023-03-08 2023-08-15 中国科学院华南植物园 Desmodium styracifolium carboglycosyltransferase and application of encoding gene thereof

Also Published As

Publication number Publication date
CN112961870B (en) 2022-08-16

Similar Documents

Publication Publication Date Title
CN112961870B (en) Carbon glycosyltransferase DhCGT2 gene in pseudo-ginseng plant and application thereof
CN107058446B (en) Group of glycosyltransferases and application thereof
CN107502599A (en) A kind of method of the O glucosyl group enoxolones of enzymatic clarification 3
CN104357418A (en) Applications of glycosyltransferase and mutants thereof to synthesis of ginsenoside Rh2
CN113416748A (en) Expression vector for synthesizing cannabidiol, heterologous expression method and application
CN111690630A (en) Beta-glucosidase, encoding gene thereof, expression and application thereof
CN118109439A (en) Beta-glucosidase for converting esculin and ginsenoside and application thereof
CN112813084B (en) Carbon glycosyltransferase DhCGT1 gene in pseudo-anethod plants and application thereof
CN110982830A (en) Glycosyl transferase gene RyUGT3A, and coding protein and application thereof
CN113088502B (en) Glycosylated transferase gene of Panax ginseng and application thereof
CN109402080B (en) Protein UGT142 and coding gene and application thereof
CN113136378A (en) Rhamnosidase TpeRhha mutant and preparation method and application thereof
CN102344915B (en) Protein with cinnamyl alcohol dehydrogenase activity and coding gene as well as application thereof
CN114045270B (en) Method for producing ginsenoside Rg1 and special engineering bacterium thereof
CN113774038B (en) Isatis tinctoria caffeic acid-O-methyltransferase protein, encoding gene and application thereof
CN107880134B (en) Method for enzymatic synthesis of kaempferol
CN110055232B (en) Two glycyrrhetinic acid sucrose synthases and application thereof in synthesis of glycyrrhetinic acid glycosylated derivatives
CN109371080A (en) A kind of method of enzyme process preparation monosaccharide groups enoxolone Galactoside derivative
CN114231545B (en) Rhamnus rhamnoides glycosyltransferase gene, preparation method, expression and application thereof
CN116790544A (en) Glycosyltransferase PpUGT5 for biosynthesis of rhizoma paridis saponin
CN114480451B (en) Polygonum multiflorum chalcone synthase gene FmCHS and encoding product and application thereof
CN107903227B (en) Succinic anhydride compound, gene and protein related to succinic anhydride compound and preparation method of succinic anhydride compound
CN113736758B (en) Bergenia oxymethyltransferase BpOMT1 gene and application thereof in preparation of 4-methoxy gallic acid
CN114480450B (en) Polygonum multiflorum resveratrol synthase gene FmRS2 and encoding product and application thereof
CN117210441B (en) Low-temperature salt-tolerant beta-glucosidase and application thereof in conversion of ginsenoside Rb1

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant