WO2023010682A1 - Anticorps capable de détecter une protéine d'agglutinine de nicotiana tabacum, procédé de préparation et son application - Google Patents

Anticorps capable de détecter une protéine d'agglutinine de nicotiana tabacum, procédé de préparation et son application Download PDF

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Publication number
WO2023010682A1
WO2023010682A1 PCT/CN2021/123450 CN2021123450W WO2023010682A1 WO 2023010682 A1 WO2023010682 A1 WO 2023010682A1 CN 2021123450 W CN2021123450 W CN 2021123450W WO 2023010682 A1 WO2023010682 A1 WO 2023010682A1
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WO
WIPO (PCT)
Prior art keywords
emulsion
immunization
animal
lectin protein
antigen
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PCT/CN2021/123450
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English (en)
Chinese (zh)
Inventor
袁清华
黄振瑞
马柱文
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广东省农业科学院作物研究所
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Publication of WO2023010682A1 publication Critical patent/WO2023010682A1/fr

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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K16/00Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/16Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from plants
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K16/00Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/06Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies from serum
    • C07K16/065Purification, fragmentation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/68Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2333/00Assays involving biological materials from specific organisms or of a specific nature
    • G01N2333/415Assays involving biological materials from specific organisms or of a specific nature from plants
    • G01N2333/42Lectins, e.g. concanavalin, phytohaemagglutinin
    • 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

Definitions

  • the invention relates to the technical field of tobacco lectin protein detection, in particular to an antibody capable of detecting tobacco lectin protein and its preparation method and application.
  • Tobacco lectin (Nictaba, Nicotiana tabacum agglutinin) was isolated from tobacco leaves for the first time in 2002, and it is an effective substance that can control various diseases and insect pests. Although there are very few related studies in China at present, a new research direction of using Nictaba as a carrier and using tobacco natural products for pest control is slowly being formed abroad. Tobacco lectins are distributed in various parts of the tobacco plant; the content of Nictaba is higher in the leaves, however, its presence is not detectable in all tobacco varieties.
  • the present invention firstly provides a method for preparing an antibody capable of detecting tobacco lectin protein; the antibody prepared by the method has high specificity for detecting tobacco lectin protein, and can be used for detecting tobacco lectin protein, for The detection of tobacco lectins provides a new way.
  • a method for preparing an antibody capable of detecting tobacco lectin protein comprising the following steps:
  • Preparation steps of emulsion 1 mix antigen, Freund's complete adjuvant and PBS (specifically 0.01M PBS) to prepare antigen-containing emulsion 1;
  • Preparation steps of emulsion 2 mix antigen, Freund's incomplete adjuvant and PBS (specifically 0.01M PBS) to prepare antigen-containing emulsion 2;
  • the immunization step includes injecting the emulsion 1 into the animal to immunize the animal for the first time; after the first immunization, injecting the emulsion 2 into the animal to immunize the animal for the second time; After the immunization, inject the emulsion 2 into the animal to immunize the animal for the third time; and/or after the third immunization, inject the emulsion 2 into the animal to immunize the animal for the fourth time;
  • Antibody purification step taking animal serum and purifying the antibody from the serum to obtain the antibody that can detect tobacco lectin protein;
  • amino acid sequence of the antigen in emulsion 1 and emulsion 2 is shown in SEQ ID NO: 1.
  • the dosage ratio of antigen, Freund's complete adjuvant and PBS is 300-500ug: 1mL: 1mL;
  • the dosage ratio of antigen, Freund's incomplete adjuvant and PBS is 300-500ug:1mL:1mL.
  • the dosage ratio of antigen, Freund's complete adjuvant and PBS is 400ug:1mL:1mL.
  • the dosage ratio of antigen, Freund's incomplete adjuvant and PBS is 400ug:1mL:1mL.
  • the amount of injected antigen is 40-60ug.
  • the amount of injected antigen is 50ug/bird.
  • the injection mentioned in the immunization step refers to subcutaneous injection.
  • the animals in the immunization step are mice.
  • the time for the first immunization is 2-3 weeks; the time for the second immunization is 2 weeks; the time for the third immunization is 1 week; the time for the fourth immunization is 1 week.
  • Emulsion 1 and Emulsion 2 to immunize mice with the above steps four times, higher titers of antibodies that can detect tobacco lectin protein can be obtained.
  • the antibody purification step specifically includes:
  • the inventors have shown through a large number of studies that: high-purity antibodies that can detect tobacco lectin protein can be obtained by using the above chromatography column method.
  • the PBS buffer containing citric acid described in step (3) refers to the PBS buffer containing 0.1M citric acid
  • the PBS buffer solution containing citric acid and glycine refers to the PBS buffer solution containing 0.7M citric acid and 0.3M glycine.
  • the composition of the PBS buffer plays a crucial role in the preparation of high-purity detectable tobacco lectin protein antibodies; when using PBS buffer containing 0.1M citric acid for washing When deactivated, high purity and high titer antibodies that can detect tobacco lectin protein can be obtained by enrichment. Further studies have shown that: when eluted with PBS buffer containing 0.7M citric acid and 0.3M glycine, antibodies that can detect tobacco lectin protein with higher purity and higher titer can be enriched.
  • the present invention also provides an antibody capable of detecting tobacco lectin protein prepared by the above preparation method.
  • the antibody capable of detecting tobacco lectin protein has the amino acid sequence described in SEQ ID NO: 2 or/and SEQ ID NO: 3.
  • the present invention also provides an application of the above-mentioned antibody capable of detecting tobacco lectin protein in detecting tobacco lectin protein.
  • the present invention prepares for the first time an antibody that can detect tobacco lectin protein; the antibody that can detect tobacco lectin protein has high specificity for tobacco lectin protein; therefore, the present invention can be used
  • the antibody that can detect tobacco lectin protein is used to detect tobacco lectin protein; the antibody that can detect tobacco lectin protein according to the present invention is successfully prepared, which provides a new detection approach for the detection of tobacco lectin protein; in addition,
  • the antibody capable of detecting tobacco lectin protein prepared by the method of the present invention also has high purity and titer; and the method is simple to operate and low in preparation cost.
  • Example 1 Preparation of an antibody capable of detecting tobacco lectin protein
  • the amount of antigen injected was 50ug/monkey; the time of the first immunization was 3 weeks; the time of the second immunization was 2 weeks; The time for the third immunization is 1 week; the time for the fourth immunization is 1 week;
  • the antibody that can detect tobacco lectin protein can be obtained by lyophilizing the liquid.
  • the antibody capable of detecting tobacco lectin protein has the amino acid sequence described in SEQ ID NO:2.
  • Antigen coating Dilute the antigen with coating solution to the specified concentration (1ug/ml if not specified separately), add 100 ⁇ L/well into a polystyrene 96-well reaction plate, and place at 4°C overnight.
  • Blocking add 200 ⁇ L/well blocking solution, and place at 37°C for 2 hours.
  • Washing wash 5 times with washing liquid.
  • Stop reaction, colorimetry add 50 ⁇ L/well stop solution. The color turns yellow; use a microplate reader to measure the absorbance of each well at 450 nm.
  • the absorbance value in the measurement well of the test sample is more than 3 times the average value of the negative control well, which shows that the antibody prepared by the present invention that can detect the tobacco lectin protein is positive; and has a higher titer.
  • Embodiment 3 Western Blot experiment
  • separating gel solution with a concentration of 15%: add 2.3ml of deionized water, 5ml of 30% acrylamide, 2.5ml of Tris with a pH of 8.8, 100 ⁇ L of 10% ammonium persulfate, 100 ⁇ L of 10% SDS, and 6 ⁇ L of TEMED (add TEMED After that, the separating gel starts to polymerize immediately, so it should be mixed immediately and quickly);
  • blocking solution is 1% casein or 2% OVA
  • Example 1 reacts with the tobacco lectin protein and does not react with the empty vector, and the blank control group does not react with the tobacco lectin protein; this shows that the antibody prepared in Example 1 has no effect on tobacco agglutinin. Proteins are specific.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Organic Chemistry (AREA)
  • Molecular Biology (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Biophysics (AREA)
  • Hematology (AREA)
  • Urology & Nephrology (AREA)
  • Biomedical Technology (AREA)
  • Genetics & Genomics (AREA)
  • Microbiology (AREA)
  • Cell Biology (AREA)
  • Biotechnology (AREA)
  • Botany (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Peptides Or Proteins (AREA)

Abstract

La présente invention se rapporte au domaine technique de la détection d'une protéine d'agglutinine de nicotiana tabacum, et concerne spécifiquement un anticorps capable de détecter une protéine d'agglutinine de nicotiana tabacum, son procédé de préparation et une application de celui-ci. Le procédé de préparation comprend les étapes suivantes : une étape de préparation pour une émulsion 1 ; une étape de préparation pour une émulsion 2 ; une étape d'immunisation, comprenant : l'injection de l'émulsion 1 dans un corps animal pour effectuer une première immunisation sur l'animal ; une fois que la première immunisation est terminée, l'injection de l'émulsion 2 dans le corps animal pour effectuer une seconde immunisation sur l'animal ; une fois que la seconde immunisation est terminée, l'injection de l'émulsion 2 dans le corps animal pour effectuer une troisième immunisation sur l'animal ; et/ou une fois que la troisième immunisation est terminée, l'injection de l'émulsion 2 dans le corps animal pour réaliser une quatrième immunisation sur l'animal ; et une étape de purification d'anticorps. L'anticorps préparé par le procédé présente une spécificité élevée pour la mesure d'une protéine d'agglutinine de nicotiana tabacum, et peut être utilisé pour détecter une protéine d'agglutinine de la nicotiana tabacum, ce qui permet d'obtenir une nouvelle manière de détecter l'agglutinine de la nicotiana tabacum.
PCT/CN2021/123450 2021-08-05 2021-10-13 Anticorps capable de détecter une protéine d'agglutinine de nicotiana tabacum, procédé de préparation et son application WO2023010682A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110898359.5A CN113603772B (zh) 2021-08-05 2021-08-05 一种可检测烟草凝集素蛋白的抗体及其制备方法和应用
CN202110898359.5 2021-08-05

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WO2023010682A1 true WO2023010682A1 (fr) 2023-02-09

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Citations (4)

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Publication number Priority date Publication date Assignee Title
CN101985475A (zh) * 2009-07-28 2011-03-16 复旦大学附属华山医院 新型分泌肽inm02的多克隆抗体及其制备方法和应用
CN104861059A (zh) * 2015-04-29 2015-08-26 中国计量学院 一种褐飞虱vrg多肽及其多抗制备方法
CN106432453A (zh) * 2016-08-23 2017-02-22 广东省农业科学院作物研究所 一种烟草凝集素蛋白及其编码基因和应用
CN109897090A (zh) * 2018-12-24 2019-06-18 中国计量大学 一种褐飞虱Vg多肽及其多抗制备方法

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US20210386820A1 (en) * 2018-09-06 2021-12-16 Academia Sinica Antiviral lectin and uses thereof
GB201903244D0 (en) * 2019-03-14 2019-04-24 Syndermix Ag Methods for lectin production with improved yield
CN110938120B (zh) * 2019-12-04 2021-12-03 中国农业科学院农业基因组研究所 改变二倍体马铃薯材料自交不亲和性的StSCI蛋白

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Publication number Priority date Publication date Assignee Title
CN101985475A (zh) * 2009-07-28 2011-03-16 复旦大学附属华山医院 新型分泌肽inm02的多克隆抗体及其制备方法和应用
CN104861059A (zh) * 2015-04-29 2015-08-26 中国计量学院 一种褐飞虱vrg多肽及其多抗制备方法
CN106432453A (zh) * 2016-08-23 2017-02-22 广东省农业科学院作物研究所 一种烟草凝集素蛋白及其编码基因和应用
CN109897090A (zh) * 2018-12-24 2019-06-18 中国计量大学 一种褐飞虱Vg多肽及其多抗制备方法

Non-Patent Citations (1)

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Title
LANNOO N., PEUMANS W., DAMME E.: "The presence of jasmonate-inducible lectin genes in some but not all Nicotiana species explains a marked intragenus difference in plant responses to hormone treatment", JOURNAL OF EXPERIMENTAL BOTANY, vol. 57, no. 12, GB , pages 3145 - 3155, XP093031812, ISSN: 0022-0957, DOI: 10.1093/jxb/erl076 *

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CN113603772B (zh) 2023-08-04

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