CN112034188A - 一种检测牛cart活性肽与牛卵泡颗粒细胞膜受体是否结合的方法 - Google Patents
一种检测牛cart活性肽与牛卵泡颗粒细胞膜受体是否结合的方法 Download PDFInfo
- Publication number
- CN112034188A CN112034188A CN202010914572.6A CN202010914572A CN112034188A CN 112034188 A CN112034188 A CN 112034188A CN 202010914572 A CN202010914572 A CN 202010914572A CN 112034188 A CN112034188 A CN 112034188A
- Authority
- CN
- China
- Prior art keywords
- cart
- pbs
- bovine
- cell membrane
- biotin
- 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
Links
- 241000283690 Bos taurus Species 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- 210000000170 cell membrane Anatomy 0.000 title claims abstract description 21
- 108090000765 processed proteins & peptides Proteins 0.000 title claims abstract description 17
- 102000006240 membrane receptors Human genes 0.000 title claims abstract description 9
- 108020004084 membrane receptors Proteins 0.000 title claims abstract description 9
- 230000003325 follicular Effects 0.000 title claims description 10
- 101100005236 Bos taurus CARTPT gene Proteins 0.000 title description 3
- 239000002245 particle Substances 0.000 title description 2
- YBJHBAHKTGYVGT-ZKWXMUAHSA-N (+)-Biotin Chemical compound N1C(=O)N[C@@H]2[C@H](CCCCC(=O)O)SC[C@@H]21 YBJHBAHKTGYVGT-ZKWXMUAHSA-N 0.000 claims abstract description 46
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 27
- 239000012634 fragment Substances 0.000 claims abstract description 25
- 229960002685 biotin Drugs 0.000 claims abstract description 23
- 235000020958 biotin Nutrition 0.000 claims abstract description 23
- 239000011616 biotin Substances 0.000 claims abstract description 23
- 102000004169 proteins and genes Human genes 0.000 claims abstract description 20
- 102000005962 receptors Human genes 0.000 claims abstract description 16
- 108020003175 receptors Proteins 0.000 claims abstract description 16
- 239000008187 granular material Substances 0.000 claims abstract description 12
- 238000002372 labelling Methods 0.000 claims abstract description 6
- 239000013604 expression vector Substances 0.000 claims abstract description 5
- 239000002158 endotoxin Substances 0.000 claims abstract description 4
- 230000006651 lactation Effects 0.000 claims abstract description 3
- 230000004001 molecular interaction Effects 0.000 claims abstract description 3
- 102100035932 Cocaine- and amphetamine-regulated transcript protein Human genes 0.000 claims abstract 12
- 101000715592 Homo sapiens Cocaine- and amphetamine-regulated transcript protein Proteins 0.000 claims abstract 12
- 239000008055 phosphate buffer solution Substances 0.000 claims description 39
- 239000000243 solution Substances 0.000 claims description 26
- 239000013612 plasmid Substances 0.000 claims description 23
- 210000004027 cell Anatomy 0.000 claims description 17
- 238000001976 enzyme digestion Methods 0.000 claims description 15
- 239000012528 membrane Substances 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- 239000000872 buffer Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 12
- 239000000523 sample Substances 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 238000001890 transfection Methods 0.000 claims description 9
- 238000010009 beating Methods 0.000 claims description 8
- 239000002609 medium Substances 0.000 claims description 7
- 239000006228 supernatant Substances 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 238000012258 culturing Methods 0.000 claims description 6
- 238000010494 dissociation reaction Methods 0.000 claims description 6
- 230000005593 dissociations Effects 0.000 claims description 6
- 210000002503 granulosa cell Anatomy 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 6
- 238000010828 elution Methods 0.000 claims description 5
- 239000001963 growth medium Substances 0.000 claims description 5
- 102000018120 Recombinases Human genes 0.000 claims description 4
- 108010091086 Recombinases Proteins 0.000 claims description 4
- 239000013592 cell lysate Substances 0.000 claims description 4
- 238000010790 dilution Methods 0.000 claims description 4
- 239000012895 dilution Substances 0.000 claims description 4
- 238000002386 leaching Methods 0.000 claims description 4
- 238000011068 loading method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000000159 protein binding assay Methods 0.000 claims description 4
- 239000000376 reactant Substances 0.000 claims description 4
- JKMHFZQWWAIEOD-UHFFFAOYSA-N 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid Chemical compound OCC[NH+]1CCN(CCS([O-])(=O)=O)CC1 JKMHFZQWWAIEOD-UHFFFAOYSA-N 0.000 claims description 3
- QKNYBSVHEMOAJP-UHFFFAOYSA-N 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydron;chloride Chemical compound Cl.OCC(N)(CO)CO QKNYBSVHEMOAJP-UHFFFAOYSA-N 0.000 claims description 3
- 102000004533 Endonucleases Human genes 0.000 claims description 3
- 108010042407 Endonucleases Proteins 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 3
- 239000012148 binding buffer Substances 0.000 claims description 3
- 239000006285 cell suspension Substances 0.000 claims description 3
- 230000003833 cell viability Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000011067 equilibration Methods 0.000 claims description 3
- 239000000499 gel Substances 0.000 claims description 3
- 210000004565 granule cell Anatomy 0.000 claims description 3
- 238000011534 incubation Methods 0.000 claims description 3
- 238000011081 inoculation Methods 0.000 claims description 3
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000012562 protein A resin Substances 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000002415 sodium dodecyl sulfate polyacrylamide gel electrophoresis Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000013595 supernatant sample Substances 0.000 claims description 3
- 239000012096 transfection reagent Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 230000004083 survival effect Effects 0.000 claims description 2
- 238000003146 transient transfection Methods 0.000 claims description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims 2
- 229910001629 magnesium chloride Inorganic materials 0.000 claims 1
- 102000018697 Membrane Proteins Human genes 0.000 abstract description 3
- 108010052285 Membrane Proteins Proteins 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 102000035160 transmembrane proteins Human genes 0.000 abstract description 3
- 108091005703 transmembrane proteins Proteins 0.000 abstract description 3
- 108090000189 Neuropeptides Proteins 0.000 abstract description 2
- 102000003797 Neuropeptides Human genes 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000012216 screening Methods 0.000 abstract description 2
- 230000033228 biological regulation Effects 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 13
- 239000000126 substance Substances 0.000 description 4
- OZFAFGSSMRRTDW-UHFFFAOYSA-N (2,4-dichlorophenyl) benzenesulfonate Chemical compound ClC1=CC(Cl)=CC=C1OS(=O)(=O)C1=CC=CC=C1 OZFAFGSSMRRTDW-UHFFFAOYSA-N 0.000 description 3
- 239000012591 Dulbecco’s Phosphate Buffered Saline Substances 0.000 description 3
- 102000003688 G-Protein-Coupled Receptors Human genes 0.000 description 3
- 108090000045 G-Protein-Coupled Receptors Proteins 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005215 recombination Methods 0.000 description 3
- 230000006798 recombination Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 102000028517 Neuropeptide receptor Human genes 0.000 description 2
- 108070000018 Neuropeptide receptor Proteins 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000013598 vector Substances 0.000 description 2
- 101150096316 5 gene Proteins 0.000 description 1
- 241000271566 Aves Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000000427 antigen Substances 0.000 description 1
- 102000036639 antigens Human genes 0.000 description 1
- 108091007433 antigens Proteins 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010367 cloning Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 102000034356 gene-regulatory proteins Human genes 0.000 description 1
- 108091006104 gene-regulatory proteins Proteins 0.000 description 1
- 239000005556 hormone Substances 0.000 description 1
- 229940088597 hormone Drugs 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 102000027424 natriuretic peptide receptors Human genes 0.000 description 1
- 108091008599 natriuretic peptide receptors Proteins 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002773 nucleotide Substances 0.000 description 1
- 125000003729 nucleotide group Chemical group 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000012474 protein marker Substances 0.000 description 1
- 238000001243 protein synthesis Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000014616 translation Effects 0.000 description 1
- 230000035899 viability Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/74—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving hormones or other non-cytokine intercellular protein regulatory factors such as growth factors, including receptors to hormones and growth factors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54306—Solid-phase reaction mechanisms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
- G01N2333/705—Assays involving receptors, cell surface antigens or cell surface determinants
- G01N2333/72—Assays involving receptors, cell surface antigens or cell surface determinants for hormones
- G01N2333/726—G protein coupled receptor, e.g. TSHR-thyrotropin-receptor, LH/hCG receptor, FSH
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Urology & Nephrology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Analytical Chemistry (AREA)
- Biotechnology (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Cell Biology (AREA)
- Microbiology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Endocrinology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
本发明涉及生物技术领域,具体涉及一种检测牛CART活性肽与牛卵泡颗粒细胞膜受体是否结合的方法,包括如下步骤:S1、合成牛CART基因,亚克隆构建到表达载体pATX1上,哺乳系统表达目的蛋白,纯化后去内毒素,并标记生物素,制备出生物素标记的CART活性肽;S2、牛卵泡颗粒细胞膜碎片的获取;S3、通过BLItz单样本分子互作分析仪检测是否出现结合信号,从而检测牛卵泡颗粒细胞膜是否存在CART受体。本发明无需合成特定膜蛋白,可有效解决跨膜蛋白合成困难的问题,为鉴定CART受体及CART调控牛卵泡发育机理奠定基础,并为筛选神经肽受体提供思路。
Description
技术领域
本发明涉及生物技术领域,具体涉及一种检测牛CART活性肽与牛卵泡颗粒细胞膜受体是否结合的方法。
背景技术
可卡因-苯丙胺调节转录肽(Cocaine - and Amphetamine - RegulatedTranscript Peptide,CART)是一种在牛卵泡发育过程中起负调控作用的神经肽,神经肽属于经典类激素,其对靶细胞的调控作用是通过其受体——靶细胞膜上的G蛋白偶联受体实现的。
已知神经肽受体除心房钠尿肽受体外,均为鸟核苷酸调节蛋白,即G蛋白偶联受体,由于G蛋白偶联受体为结构复杂的7次跨膜蛋白,故通过蛋白重组或合成,检测与其配体是否结合的方法不可行。
生物膜干涉技术(Biolayer Interferometry,BLI)可实时监控分子间的结合过程,该技术中抗原分子结合到光纤材质的生物传感器末端时形成生物膜,当抗原—抗体结合后生物膜厚度发生变化,此时,光通过传感器产生干涉光波,生物膜厚度是否变化通过干涉光波是否发生相对位移即可判断,干涉光波被光谱仪检测并形成干涉光谱,以干涉图谱的实时位移(nm)显示出来。
发明内容
为解决上述问题,本发明提供了一种检测牛CART活性肽与牛卵泡颗粒细胞膜受体是否结合的方法,通过特定传感器固化CART,然后与细胞膜碎片结合,通过干涉图谱实时位移(nm)的变化判断是否有结合信号,从而检测CART受体是否存在,无需合成特定膜蛋白,可有效解决跨膜蛋白合成困难的问题。
为实现上述目的,本发明采取的技术方案为:
一种检测牛CART活性肽与牛卵泡颗粒细胞膜受体是否结合的方法,包括如下步骤:
S2、牛卵泡颗粒细胞膜碎片的获取;
进一步地,所述步骤S1具体包括如下步骤:
将酶切混合物放入37℃水浴锅中酶切30 min,并混匀,酶切后,根据质粒体积加入0.75倍异丙醇,混匀,4℃离心30 min后弃上清,加入1 mL 70%乙醇4 ℃离心5 min,进行回收;
(1)转染前一天,接种27×106个细胞到完全培养基中培养;
(3)将稀释后的PEI 加入稀释后的DNA中,此时转染混合物总体积为3 mL,轻柔混匀,室温孵育25 min;
(4)将3 mL转染混合物加入27 mL细胞悬液中,轻柔混匀,37 ℃, 5% CO2, 130 rpm条件下培养10 d,至细胞活率降到50%以下收样;
S14、CART蛋白160 mL放大及纯化
(2)亲和蛋白A树脂的纯化;
(3)清洗树脂:根据树脂用量选择10倍树脂体积 binding buffer (PBS pH 7.5)清洗;
(4)上样:将收集的上清样品过柱,此过程缓慢进行,加速时必须控制速度:1 s/滴;
(5)淋洗:用PBS pH 7.5淋洗结合液,结合液通过自身重力向下滴,控制速度在1 s/滴;
(6)用20 mM柠檬酸pH 2.7缓冲液进行洗脱,缓慢进行;
S15、生物素标记CART
将生物素使用DMF溶解,浓度20 mg/mL,并将抗体溶解于PBS,使用CBS调至pH 8.5,终浓度1-10 mg/mL;
进一步地,所述步骤S2具体包括如下步骤:
收集牛卵泡颗粒细胞,600 g离心5 min,4 ℃PBS缓冲液漂洗细胞两次,加入1 mL冷的细胞裂解液(50 mM Hepes、150 mM NaCl、3 mM MgCl2)并收集细胞,移至EP管,反复吹打,1000 g 3min离心,将上清移至另一新EP管,21,460 g 1 h 4℃离心,收集沉淀,加入1 mLPBS后反复吹打,得到细胞膜碎片。
进一步地,所述步骤S3具体包括如下步骤:
在BLItz Pro 1.3系统中操作,反应体积300 ,实验方法如下: (1) 基线平衡:将SA传感器放入PBS中浸湿10 min,在系统中进行第一次基线平衡,时间60 s;(2) CART固定:将传感器伸入含有生物素标记的终浓度为0.1 μg/μL的CART溶液中,时间300 s;(3) 基线平衡:将传感器伸入PBS中进行第二次基线平衡,时间240 s;(4) 结合测定:将传感器移至包含膜碎片的PBS溶液中进行结合测定,时间300 s;(5) 蛋白解离:将结合后的探针再次转移到PBS中进行解离实验,时间300 s。
本发明具有以下有益效果:
本发明通过特定传感器固化CART,然后与细胞膜碎片结合,通过干涉图谱实时位移(nm)的变化判断是否有结合信号,从而检测CART受体是否存在,无需合成特定膜蛋白,可有效解决跨膜蛋白合成困难的问题,为鉴定CART受体及CART调控牛卵泡发育机理奠定基础,并为筛选神经肽受体提供思路。
附图说明
图1为 CART蛋白纯化及定量检测示意图;
图中:MW:蛋白Marker;IN:上柱前;FT:流穿液;W:洗涤;E:洗脱
图2 为不同浓度GCs膜碎片溶液与SA传感器的结合示意图。
具体实施方式
下面结合具体实施例对本发明进行详细说明。以下实施例将有助于本领域的技术人员进一步理解本发明,但不以任何形式限制本发明。应当指出的是,对本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进。这些都属于本发明的保护范围。
实验例
一、生物素标记CART活性肽
1.1 CART表达载体亚克隆
表达载体:pATX1,亚克隆位点:EcoRI/ NotI
(1)取PCR管并标记,依次加入4 同源重组酶(EasyGeno快速重组克隆试剂盒(天根生化科技有限公司,中国,货号:VI201)中的同源重组酶),5 目的基因片段(CART基因片段),1 线性化载体(pATX1);
(2)吹打均匀后,置于预热的50℃ PCR仪中孵育45 min;
(3)重组好的体系放置4℃冰箱,用于下一步的转化。
交由公司测序,鉴定质粒重组是否成功,通过比对,其测序结果正确,CART活性肽序列及基因序列如下:
>CART活性肽序列
MESPRLRLLPLLGAALLLLLPLLGALAQEDAELQPRALDIYSAVEDASHEKELIEALQEVLKKLKSKRIPIYEKKYGQVPMCDAGEQCAVRKGARIGKLCDCPRGTSCNSFLLKCL
> CART基因序列
GCCGCCACCATGGAGTCCCCCAGGCTGAGGCTGCTGCCCCTGCTGGGAGCCGCTCTGCTGCTGCTGCTCCCCCTGCTGGGCGCTCTGGCTCAGGAGGACGCCGAGCTGCAGCCTAGGGCCCTGGATATCTACAGCGCCGTGGAGGACGCCAGCCACGAGAAGGAGCTGATCGAGGCCCTGCAGGAGGTGCTGAAGAAGCTGAAGTCCAAGAGAATCCCCATCTACGAGAAGAAGTACGGCCAGGTGCCCATGTGCGATGCCGGCGAGCAGTGTGCCGTGAGAAAGGGCGCCAGAATCGGCAAGCTGTGCGATTGCCCCAGAGGCACATCCTGCAATTCCTTTCTGCTGAAGTGCCTG
1.2 载体线性化
检测所提取质粒的浓度及纯度,对纯度符合要求的质粒进行酶切,配制如下酶切体系:6 PvuI内切酶(Thermo,美国),1010×Fast Digest Buffer/Fast Digest GreenBuffer,50质粒,将酶切混合物放入37℃水浴锅中酶切30 min,并混匀,酶切后,根据质粒体积加入0.75倍异丙醇,混匀,4℃离心30 min后弃上清,加入1 mL 70%乙醇4 ℃离心5min,进行回收。
1.3 质粒转染细胞
将质粒瞬时转染到XtenCHO细胞中,收集培养基和细胞,直至存活率下降到50%以下,具体操作如下:
(1)转染前一天,接种27×106个细胞到完全培养基中培养;
(3)将稀释后的PEI 加入稀释后的DNA中,此时转染混合物总体积为3 mL,轻柔混匀,室温孵育25 min;
(4)将3 mL转染混合物加入27 mL细胞悬液中,轻柔混匀,37 ℃, 5% CO2, 130 rpm条件下培养10 d,至细胞活率降到50%以下收样。
1.4 CART蛋白160 mL放大及纯化
(1)对pATX1表达结构进行无内毒素DNA制备,采用PureLink™ Expi Endotoxin-FreeMaxi Plasmid Purification Kit去内毒素质粒提取试剂盒(Thermo,美国);
(2)亲和蛋白A树脂的纯化;
(3)清洗树脂:根据树脂用量选择10倍树脂体积 binding buffer (PBS pH 7.5)清洗;
(4)上样:将收集的上清样品过柱,此过程缓慢进行,加速时必须控制速度:1 s/滴;
(5)淋洗:结合液通过自身重力向下滴,控制速度(1 s/滴),W1:用PBS pH 7.5淋洗;
(6)用20 mM柠檬酸pH 2.7缓冲液进行洗脱,缓慢进行;
(8)纯化结果如图1 A所示,将E1 - E6组分混合,进行缓冲液交换和浓缩,最终的QC 如图1 B所示。
1.5 生物素标记CART
蛋白终浓度为:1.7 mg/mL,总蛋白量:500 ,生物素使用DMF溶解,浓度20 mg/mL,将抗体溶解于PBS,使用CBS调至pH 8.5,终浓度1-10 mg/mL,按每mg抗体加5 μL生物素溶液,室温避光搅拌2 h,收集反应物使用PBS透析过夜,中途更换PBS 3-4次,经生物素标记后终浓度:0.1 mg/mL,总蛋白:495 。
二、BLI技术
2.1牛卵泡颗粒细胞收集
无菌DPBS漂洗卵泡,并投入盛有DPBS的培养皿中,用眼科剪将其剪开,沿内壁轻轻刮取颗粒细胞,然后将颗粒细胞和DPBS共同移至1.5 mL EP管中,1,000 rpm离心7 min,弃上清,将颗粒细胞立即投入液氮中,备用。
2.2 膜碎片的获取
收集细胞,600 g离心5 min,4 ℃PBS缓冲液漂洗细胞两次,加入1 mL冷的细胞裂解液(50 mM Hepes、150 mM NaCl、3 mM MgCl2)并收集细胞,移至EP管,反复吹打,1000 g 3min离心,将上清移至另一新EP管,21,460 g 1 h 4℃离心,收集沉淀,加入1 mL PBS后反复吹打,即可得到细胞膜碎片。
2.3 BLI体外检测细胞膜CART受体与CART的结合
在BLItz Pro 1.3系统中操作,反应体积300 ,实验方法如下: (1) 基线(Baseline)平衡。将SA传感器放入PBS中浸湿10 min,在系统中进行第一次基线平衡,时间60 s。(2) CART固定。将传感器伸入含有生物素标记的终浓度为0.1 μg/μL的CART溶液中,时间300 s。(3) 基线(Baseline)平衡。将传感器伸入PBS中进行第二次基线平衡,时间240s。(4) 结合测定。将传感器移至包含膜碎片的PBS溶液中进行结合(Association)测定,时间300 s。(5) 蛋白解离。将结合后的探针再次转移到PBS中进行解离(Dissociation)实验,时间300 s。
三、结果与分析
本次BLI实验共分为4组,第1组为空白对照组,即用PBS代替膜碎片溶液,第2组~第4组分别为提取到的膜碎片溶液、稀释1倍后的膜碎片溶液、稀释2倍后的膜碎片溶液。
如图2所示,横坐标表示实验时间,纵坐标表示实时位移。第一阶段(0~60 s)基线平衡为校准阶段,将SA传感器伸入PBS溶液中,此时溶液中没有与CART结合的物质,故4组输出的实时位移均为0 nm;第二阶段(60~360 s)将生物素标记的CART固定于SA传感器,此时系统输出的实时位移瞬间上升,且随着时间的进行,该曲线逐渐趋于平缓,表明传感器已成功钓取到CART;第三阶段(360 s~600 s)将传感器上面除CART以外的其他物质用PBS进行洗脱,该阶段与第一阶段实时位移相较,各组均明显升高且几乎为直线,表明CART已稳定结合于传感器;第四阶段(600~900 s)结合测定,将传感器伸入膜碎片溶液中,曲线慢慢上升,说明溶液中存在CART受体并与CART发生结合;第五阶段(900~1200 s)再次将探针伸入PBS中,该阶段主要对未与CART结合的物质进行洗脱,该阶段与第三阶段(传感器上只结合CART)相较,各组(除空白对照组外)实时位移都存在不同程度的升高,再次验证膜碎片溶液中确实存在与CART相结合的CART受体。
第三阶段结束后,各组实时位移分别是:1.99951 nm、1.31913 nm、1.73816 nm和2.4418 nm,表明各组结合CART量由大到小分别是:第4组、第1组、第3组和第2组;第四阶段结束后,各组实时位移分别是:2.02263 nm、2.43398 nm、3.02121 nm和3.38309 nm,经历第三阶段后,第1组SA传感器上结合的CART量较多,但实时位移基本不变,说明该组第四阶段未结合其他物质,也验证了空白对照组具有可信性;当第五阶段洗脱结束后,各组实时位移分别是:2.0571 nm、2.32464 nm、2.9521 nm和3.13984 nm,因此膜碎片结合量由大到小依次为:第4组、第3组、第2组和第1组,虽然各组固化的CART量不同,但结合的膜碎片量并未随CART量增加而增加,膜碎片溶液稀释后反而增加了其与CART的结合量,推测可能原因为,溶液稀释后导致膜表面的受体暴露更多,促进了更多的受体与CART作用,因此显示第4组实时位移最高,即稀释2倍后的膜碎片溶液与CART结合性最强。
以上对本发明的具体实施例进行了描述。需要理解的是,本发明并不局限于上述特定实施方式,本领域技术人员可以在权利要求的范围内做出各种变化或修改,这并不影响本发明的实质内容。在不冲突的情况下,本申请的实施例和实施例中的特征可以任意相互组合。
序列表
<110> 山西农业大学
<120> 一种检测牛CART活性肽与牛卵泡颗粒细胞膜受体是否结合的方法
<160> 2
<170> SIPOSequenceListing 1.0
<210> 1
<211> 357
<212> RNA
<213> 人工序列(gccgccacca tggagtcccc caggctgagg ctgctgcccc tgctgggagccgctctgctg 60 ctgctgctcc ccctgctggg cgctctggct caggaggacg ccgagctgcagcctagggcc 120 ctggatatct acagcgccgt ggaggacgcc agccacgaga aggagctgatcgaggccctg 180 caggaggtgc tgaagaagct gaagtccaag agaatcccca tctacgagaagaagtacggc 240 caggtgccca tgtgcgatgc cggcgagcag tgtgccgtga gaaagggcgccagaatcggc 300 aagctgtgcg attgccccag aggcacatcc tgcaattcct ttctgctgaa gtgcctg357)
<400> 1
<210> 2
<211> 116
<212> PRT
<213> 人工序列(mesprlrllp llgaalllll pllgalaqed aelqpraldi ysavedashekeliealqev 60 lkklkskrip iyekkygqvp mcdageqcav rkgarigklc dcprgtscns fllkcl116)
<400> 2
Claims (4)
将酶切混合物放入37℃水浴锅中酶切30 min,并混匀,酶切后,根据质粒体积加入0.75倍异丙醇,混匀,4℃离心30 min后弃上清,加入1 mL 70%乙醇4 ℃离心5 min,进行回收;
(1)转染前一天,接种27×106个细胞到完全培养基中培养;
(3)将稀释后的PEI 加入稀释后的DNA中,此时转染混合物总体积为3 mL,轻柔混匀,室温孵育25 min;
(4)将3 mL转染混合物加入27 mL细胞悬液中,轻柔混匀,37 ℃, 5% CO2, 130 rpm条件下培养10 d,至细胞活率降到50%以下收样;
S14、CART蛋白160 mL放大及纯化
(2)亲和蛋白A树脂的纯化;
(3)清洗树脂:根据树脂用量选择10倍树脂体积 binding buffer (PBS pH 7.5)清洗;
(4)上样:将收集的上清样品过柱,此过程缓慢进行,加速时必须控制速度:1 s/滴;
(5)淋洗:用PBS pH 7.5淋洗结合液,结合液通过自身重力向下滴,控制速度在1 s/滴;
(6)用20 mM柠檬酸pH 2.7缓冲液进行洗脱,缓慢进行;
S15、生物素标记CART
将生物素使用DMF溶解,浓度20 mg/mL,并将抗体溶解于PBS,使用CBS调至pH 8.5,终浓度1-10 mg/mL;
3.如权利要求1所述的一种检测牛CART活性肽与牛卵泡颗粒细胞膜受体是否结合的方法,其特征在于:所述步骤S2具体包括如下步骤:
收集牛卵泡颗粒细胞,600 g离心5 min,4 ℃PBS缓冲液漂洗细胞两次,加入1 mL冷的细胞裂解液并收集细胞,移至EP管,反复吹打,1000 g 3min离心,将上清移至另一新EP管,21,460 g 1 h 4℃离心,收集沉淀,加入1 mL PBS后反复吹打,得到细胞膜碎片,所述细胞裂解液包括50 mM Hepes、150 mM NaCl、3 mM MgCl2。
4.如权利要求1所述的一种检测牛CART活性肽与牛卵泡颗粒细胞膜受体是否结合的方法,其特征在于:所述步骤S3具体包括如下步骤:
在BLItz Pro 1.3系统中操作,反应体积300 μL,实验方法如下: (1) 基线平衡:将SA传感器放入PBS中浸湿10 min,在系统中进行第一次基线平衡,时间60 s;(2) CART固定:将传感器伸入含有生物素标记的终浓度为0.1 μg/μL的CART溶液中,时间300 s;(3) 基线平衡:将传感器伸入PBS中进行第二次基线平衡,时间240 s;(4) 结合测定:将传感器移至包含膜碎片的PBS溶液中进行结合测定,时间300 s;(5) 蛋白解离:将结合后的探针再次转移到PBS中进行解离实验,时间300 s。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010914572.6A CN112034188B (zh) | 2020-09-03 | 2020-09-03 | 一种检测牛cart活性肽与牛卵泡颗粒细胞膜受体是否结合的方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010914572.6A CN112034188B (zh) | 2020-09-03 | 2020-09-03 | 一种检测牛cart活性肽与牛卵泡颗粒细胞膜受体是否结合的方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN112034188A true CN112034188A (zh) | 2020-12-04 |
CN112034188B CN112034188B (zh) | 2023-10-20 |
Family
ID=73591357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010914572.6A Active CN112034188B (zh) | 2020-09-03 | 2020-09-03 | 一种检测牛cart活性肽与牛卵泡颗粒细胞膜受体是否结合的方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112034188B (zh) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090263406A1 (en) * | 2007-10-30 | 2009-10-22 | Michigan State University | JY-1 Regulation Of Granulosa Cell Function And Early Embryonic Development In Cattle |
CN107389938A (zh) * | 2017-07-05 | 2017-11-24 | 浙江警察学院 | 一种基于生物膜干涉技术的摇头丸检测方法 |
CN107446938A (zh) * | 2016-05-31 | 2017-12-08 | 赵蔚 | 一种特异性靶向受体蛋白magea及其car‑t载体的构建方法 |
CN110824158A (zh) * | 2018-08-07 | 2020-02-21 | 上海恒润达生生物科技有限公司 | 一种检测cart细胞针对靶抗原细胞因子的分泌的方法 |
CN110849863A (zh) * | 2019-10-15 | 2020-02-28 | 中国人民解放军第二军医大学 | 一种快速有效的检测适配体与配体小分子结合过程中构象改变的方法 |
-
2020
- 2020-09-03 CN CN202010914572.6A patent/CN112034188B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090263406A1 (en) * | 2007-10-30 | 2009-10-22 | Michigan State University | JY-1 Regulation Of Granulosa Cell Function And Early Embryonic Development In Cattle |
CN107446938A (zh) * | 2016-05-31 | 2017-12-08 | 赵蔚 | 一种特异性靶向受体蛋白magea及其car‑t载体的构建方法 |
CN107389938A (zh) * | 2017-07-05 | 2017-11-24 | 浙江警察学院 | 一种基于生物膜干涉技术的摇头丸检测方法 |
CN110824158A (zh) * | 2018-08-07 | 2020-02-21 | 上海恒润达生生物科技有限公司 | 一种检测cart细胞针对靶抗原细胞因子的分泌的方法 |
CN110849863A (zh) * | 2019-10-15 | 2020-02-28 | 中国人民解放军第二军医大学 | 一种快速有效的检测适配体与配体小分子结合过程中构象改变的方法 |
Non-Patent Citations (4)
Title |
---|
LI PENGFEI 等: "Study on the relationship between expression patterns of cocaine-and amphetamine regulated transcript and hormones secretion in porcine ovarian follicles", BIOLOGICAL RESEARCH, vol. 51, pages 6 * |
侯淑宁等: "牛卵泡CART受体的筛选及其表达特性分析", 畜牧兽医学报, vol. 51, no. 3, pages 506 * |
李鹏飞;孟金柱;刘岩;黄洋;陈建伟;姜晓龙;曹霞;姚晓磊;赵妙妙;吕丽华;: "免疫共沉淀筛选牛卵泡CART相互作用蛋白的研究", 畜牧兽医学报, no. 12 * |
王锴;孟金柱;李鹏飞;毕锡麟;景炅婕;张子宁;吕丽华;: "牛卵泡可卡因-苯丙胺调节转录肽候选受体的筛选", 山西农业大学学报(自然科学版), no. 04 * |
Also Published As
Publication number | Publication date |
---|---|
CN112034188B (zh) | 2023-10-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN112359022B (zh) | 检测用新型冠状病毒核酸假病毒标准物质及其制备方法 | |
CN101878304B (zh) | 用于从单个样品中分离基因组dna、rna和蛋白质的方法 | |
WO2022179349A1 (zh) | 新型冠状病毒抗原及其应用 | |
EP2437055B1 (en) | Method for screening for a drug candidate substance which inhibits target protein-protein interaction for developing a novel concept drug | |
CN112111015B (zh) | PLA2R、C1q、THSD7A融合蛋白及其构建方法、应用 | |
CN111500583B (zh) | 特异性识别牛妊娠相关糖蛋白4的核酸适配体及其应用 | |
CN109750058A (zh) | 一种白色念珠菌的研究方法 | |
CN112034188A (zh) | 一种检测牛cart活性肽与牛卵泡颗粒细胞膜受体是否结合的方法 | |
CN112126649B (zh) | 基于工程化细胞的N-cadherin核酸适配体的筛选及应用 | |
CN111606997A (zh) | 抗肌酸激酶同工酶抗体及其制备方法、应用、氨基酸序列 | |
KR20210055754A (ko) | 항 인간 심근 트로포닌 i의 항체 및 그 사용 | |
US8053194B2 (en) | Labeling substance and chimeric substance and method for preparing the same and method for capturing, structurally analyzing and/or identifying biological substance by means of the labeling substance | |
CN114958910B (zh) | DropCRISPRa高效靶向相分离基因激活系统及其构建方法和应用 | |
CN106399316B (zh) | 用于识别Gremlin-1的核酸适配子及其应用 | |
CN116041520A (zh) | 针对Human CD63的兔单克隆抗体及其制备方法和应用 | |
CN109293764A (zh) | 鹿亚科激活素a蛋白及其制备与应用 | |
CN114573672A (zh) | 西瓜苦味物质葫芦素e的转运蛋白及其应用 | |
EP1715052A1 (en) | Composition and method for elevating gene transfer efficiency | |
CN111655865B (zh) | 使用基于杂交链式反应的方法的多重免疫信号放大 | |
CN111548412A (zh) | 乙肝表面抗原单克隆抗体及制备方法、应用、氨基酸序列 | |
CN112266916A (zh) | 一种羊妊娠相关糖蛋白核酸适配体及其应用 | |
CN111334511A (zh) | 一种特异性识别牛妊娠相关糖蛋白的核酸适配体及其应用 | |
CN114045291B (zh) | 重组人Sema4C蛋白、表达载体、宿主细胞以及应用 | |
CN117624336A (zh) | 一种活性重组hSIRPA蛋白的表达纯化及检测方法 | |
CN113150128B (zh) | 流感病毒np蛋白的单克隆抗体及其应用 |
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 |