CN115477698A - 新冠病毒rbd特异性单克隆抗体和应用 - Google Patents

新冠病毒rbd特异性单克隆抗体和应用 Download PDF

Info

Publication number
CN115477698A
CN115477698A CN202210507397.8A CN202210507397A CN115477698A CN 115477698 A CN115477698 A CN 115477698A CN 202210507397 A CN202210507397 A CN 202210507397A CN 115477698 A CN115477698 A CN 115477698A
Authority
CN
China
Prior art keywords
ser
gly
thr
leu
val
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
CN202210507397.8A
Other languages
English (en)
Other versions
CN115477698B (zh
Inventor
王应明
胡超
吴蕊鑫
郝亚楠
母松
陈倩
金艾顺
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.)
Chongqing Medical University
Original Assignee
Chongqing Medical 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 Chongqing Medical University filed Critical Chongqing Medical University
Priority to CN202210507397.8A priority Critical patent/CN115477698B/zh
Priority claimed from CN202210507397.8A external-priority patent/CN115477698B/zh
Publication of CN115477698A publication Critical patent/CN115477698A/zh
Application granted granted Critical
Publication of CN115477698B publication Critical patent/CN115477698B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K16/00Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/08Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from viruses
    • C07K16/10Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from viruses from RNA viruses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/12Antivirals
    • A61P31/14Antivirals for RNA viruses
    • 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
    • G01N33/53Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/569Immunoassay; Biospecific binding assay; Materials therefor for microorganisms, e.g. protozoa, bacteria, viruses
    • G01N33/56983Viruses
    • 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
    • G01N33/53Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/577Immunoassay; Biospecific binding assay; Materials therefor involving monoclonal antibodies binding reaction mechanisms characterised by the use of monoclonal antibodies; monoclonal antibodies per se are classified with their corresponding antigens
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00Medicinal preparations containing antigens or antibodies
    • A61K2039/505Medicinal preparations containing antigens or antibodies comprising antibodies
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K2317/00Immunoglobulins specific features
    • C07K2317/50Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/51Complete heavy chain or Fd fragment, i.e. VH + CH1
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K2317/00Immunoglobulins specific features
    • C07K2317/50Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/515Complete light chain, i.e. VL + CL
    • 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
    • G01N2333/005Assays involving biological materials from specific organisms or of a specific nature from viruses
    • G01N2333/08RNA viruses
    • G01N2333/165Coronaviridae, e.g. avian infectious bronchitis virus
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2469/00Immunoassays for the detection of microorganisms
    • G01N2469/10Detection of antigens from microorganism in sample from host
    • 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

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Molecular Biology (AREA)
  • Virology (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Urology & Nephrology (AREA)
  • Hematology (AREA)
  • Biomedical Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Biochemistry (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biotechnology (AREA)
  • Cell Biology (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Food Science & Technology (AREA)
  • Microbiology (AREA)
  • Genetics & Genomics (AREA)
  • Public Health (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Oncology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Communicable Diseases (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Tropical Medicine & Parasitology (AREA)
  • Peptides Or Proteins (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

本发明属于单克隆抗体技术领域,具体公开了新冠病毒RBD特异性单克隆抗体以及上述新冠病毒RBD特异性单克隆抗体在制备检测或诊断SARS‑CoV‑2试剂或疫苗或药物中的应用,其中药物包括新冠病毒RBD特异性单克隆抗体和药学上可接受的赋形剂、稀释剂或载体;还提供了编码上述新冠病毒RBD特异性单克隆抗体的核酸分子;还提供了含有上述核酸分子的表达盒、重组载体、重组菌或转基因细胞系;还提供了上述表达盒、重组载体、重组菌或转基因细胞系在制备产品中的应用。本发明对于新型冠状病毒SARS‑CoV‑2引起疾病的预防、临床治疗和诊断试剂的研发均具有重要的科学意义和应用前景。

Description

新冠病毒RBD特异性单克隆抗体和应用
技术领域
本发明属于单克隆抗体技术领域,尤其涉及新冠病毒RBD特异性单克隆抗体和应用。
背景技术
抗体是由四条多肽链组成的免疫球蛋白分子,四条多肽链包括两条重链(H链)和两条轻链(L 链)。H链由重链可变区(VH)和重链恒定区组成,重链恒定区由三个区CH1、CH2和CH3组成。L 链由L链可变区(VL)和轻链恒定区组成,轻链恒定区由CL区组成。VH和VL可进一步分成称为互补决定区(CDRs)的高变区和称为构架区(FR)交替分布的保守区。
目前研究发现:新冠病毒(SARS-CoV-2)具有四种主要的结构蛋白,分别为刺突蛋白(S蛋白)、核衣壳蛋白(N蛋白)、膜蛋白(M蛋白)和包膜蛋白(E蛋白),其中S蛋白有两个亚基:S1和 S2,受体结合位点(RBD)位于S1亚基上,其主要功能是识别宿主细胞表面受体,介导与宿主细胞的融合。
申请公开号为CN111303280A的中国发明专利申请公开了一种高中和活性抗SARS-CoV-2全人源单克隆抗体,上述专利提供的是识别区域为S1非RBD区的全人源单克隆抗体,但是由于新冠病毒入侵宿主细胞是通过RBD与宿主细胞的ACE2结合,所以上述专利获得的全人源单克隆抗体对病毒的阻断效果有限,并且上述专利是通过标记浆细胞而获得抗体cDNA,但是与浆细胞相比,是记忆 B细胞活化后迅速做出反应,所以记忆B细胞能够引发比初次反应更快,也更强烈的体液免疫反应,而浆细胞所引发的体液免疫反应有限。
发明内容
本发明的目的在于提供一种针对RBD,并且能够引发更强烈体液免疫反应的新冠病毒RBD特异性单克隆抗体和应用。
为了达到上述目的,本发明提供了新冠病毒RBD特异性单克隆抗体,具体的,抗体的重链氨基酸序列如SEQ ID NO:1所示;轻链氨基酸序列如SEQ ID NO:2所示(单抗11-CQTS055)。重链氨基酸序列还可如SEQ ID NO:3所示;轻链氨基酸序列还可如SEQ ID NO:4所示(单抗12-CQTS056)。重链氨基酸序列还可如SEQ ID NO:5所示;轻链氨基酸序列还可如SEQ ID NO:6所示(单抗 13-CQTS057)。重链氨基酸序列还可如SEQ ID NO:7所示;轻链氨基酸序列还可如SEQ ID NO:8所示(单抗14-CQTS058)。重链氨基酸序列还可如SEQ ID NO:9所示;轻链氨基酸序列还可如SEQ ID NO:10所示(单抗15-CQTS059)。重链氨基酸序列还可如SEQ ID NO:11所示;轻链氨基酸序列还可如SEQ ID NO:12所示(单抗16-CQTS061)。重链氨基酸序列还可如SEQ ID NO:13所示;轻链氨基酸序列还可如SEQ ID NO:14所示(单抗17-CQTS062)。重链氨基酸序列还可如SEQ ID NO:15所示;轻链氨基酸序列还可如SEQ ID NO:16所示(单抗18-CQTS063)。重链氨基酸序列还可如SEQ ID NO:17所示;轻链氨基酸序列还可如SEQ ID NO:18所示(单抗19-CQTS064)。重链氨基酸序列还可如SEQ ID NO:19所示;轻链氨基酸序列还可如SEQ ID NO:20所示(单抗20-CQTS065)。
本发明还提供了上述新冠病毒RBD特异性单克隆抗体,在制备检测或诊断SARS-CoV-2试剂或疫苗或药物中的应用,其中药物包括新冠病毒RBD特异性单克隆抗体和药学上可接受的赋形剂、稀释剂或载体;还提供了编码上述新冠病毒RBD特异性单克隆抗体的核酸分子;还提供了含有上述核酸分子的表达盒、重组载体、重组菌或转基因细胞系;还提供了上述表达盒、重组载体、重组菌或转基因细胞系在制备产品中的应用。
本发明还提供了产品,包括上述新冠病毒RBD特异性单克隆抗体;产品用途如下(b1)-(b4) 中的任一种:(b1)结合新型冠状病毒SARS-CoV-2;(b2)检测结合新型冠状病毒SARS-CoV-2; (b3)结合新型冠状病毒SARS-CoV-2的S蛋白;(b4)检测新型冠状病毒SARS-CoV-2的S蛋白。
优选的,上述新冠病毒RBD特异性单克隆抗体均通过分选RBD特异性记忆B细胞,再通过RBD 特异性记忆B细胞的mRNA获得抗体可变区cDNA。
本发明的原理和有益效果在于:
(1)本发明提供的单克隆抗体具有RBD特异性,与针对S1非RBD区的单可隆抗体相比,本发明提供的单克隆抗体与RBD结合,为抗体药物筛选,诊断、预防和治疗新冠肺炎提供了更加广泛的应用价值。
(2)本发明提供的单克隆抗体是通过分选RBD特异性记忆B细胞而得到,与通过分选浆细胞的现有技术相比,本发明制备的单克隆抗体能够引发更强烈的体液免疫反应。另外,本发明只针对 RBD特异性记忆B细胞进行后续RT-PCR、巢式PCR和抗体功能分析,大大提高了单克隆抗体与RBD 特异性结合能力。
附图说明
图1为采用流式细胞仪分析记忆B细胞的细胞分选图;
图2为采用流式细胞仪分析RBD特异性记忆B细胞的细胞分选图;
图3为单细胞抗体基因PCR产物凝胶电泳图;
图4为PCR扩增包含CMV启动子、WPRE-γ或WPRE-κ元件抗体基因表达盒后的琼脂糖凝胶电泳图;
图5为RBD特异性的实验结果图。
具体实施方式
下面将结合本发明实施例的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明的一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
本实施例提供新冠病毒RBD特异性单克隆抗体,重链氨基酸序列如SEQ ID NO:1所示;轻链氨基酸序列如SEQ ID NO:2所示。
本实施例还提供了上述新冠病毒RBD特异性单克隆抗体,在制备检测或诊断SARS-CoV-2试剂或药物中的应用。
在实际生产时,可以采用本实施例得到采用新冠病毒RBD特异性单克隆抗体制备核酸分子,或者制备包含该核酸分子的表达盒、重组载体、重组菌或转基因细胞系,或者制备药物组合物,该药物组合物包括上述新冠病毒RBD特异性单克隆抗体和药学上可接受的赋形剂、稀释剂或载体。
在应用时,本实施例得到采用新冠病毒RBD特异性单克隆抗体制备的相关产品,可具有如下(b1) -(b4)中的任一种的用途:(b1)结合新型冠状病毒SARS-CoV-2;(b2)检测结合新型冠状病毒 SARS-CoV-2;(b3)结合新型冠状病毒SARS-CoV-2的S蛋白;(b4)检测新型冠状病毒SARS-CoV-2 的S蛋白。
实施例2-10
实施例2-10与实施例1的区别在于:新冠病毒RBD特异性单克隆抗体的氨基酸序列不同,实施例2-10的氨基酸序列如下表所示:
Figure RE-GDA0003920084880000031
Figure RE-GDA0003920084880000041
以上实施例1-10所提供的新冠病毒RBD特异性单克隆抗体均通过以下方法得到:首先从新冠肺炎康复患者的外周血中分选得到单个RBD特异性记忆B细胞,然后获得RBD特异性记忆B细胞的 mRNA,再通过RT-PCR和巢式PCR构建抗体可变区基因表达盒,再将抗体可变区基因表达盒转导入293T细胞表达抗体并收集上清,用ELISA法检测上清的RBD特异性,筛选得到新冠病毒RBD特异性单克隆抗体。
具体包括以下步骤:
S1、采集若干名新冠肺炎康复患者外周血,分离得到PBMC,在-80℃的冰箱中冻存备用。
S2、首先采用去死细胞染料(Dead Dye)去除S1得到的PBMC的死细胞,然后采用CD19、mIg-G、 mIg-D和S-RBD对PBMC中活的RBD特异性并且结合能力高的记忆B细胞染色标记,筛选出针对 RBD特异性记忆B细胞;使用流式细胞分选仪将特异性记忆B细胞分选到96孔板上,每个孔内有一个特异性记忆B细胞,在-80℃的冰箱中冻存备用。
具体的,本实施例优选的Dead Dye染色时的浓度范围为1-2μg/mL,本实施例优选Dead Dye染色时的浓度为1.5μg/mL;CD19为Biolegend生产的B细胞标记物,染色时的浓度范围为1-2μg/mL,本实施例优选CD19染色时的浓度为1.5μg/mL。mIg-G为Biolegend生产的B细胞标表面受体,染色时的浓度范围为1-2μg/mL,本实施例优选mIg-G染色时的浓度为1.5μg/mL;mIg-D为Biolegend生产的B细胞表面受体,染色时的浓度范围为1-2μg/mL,本实施例优选mIg-D染色时的浓度为 1.5μg/mL;S-RBD为sinobiological生产的新冠病毒是蛋白受体结构域,染色时的浓度范围为1-2μg/mL,本实施例优选S-RBD染色时的浓度为1.5μg/mL。
通过流式细胞仪分选RBD特异性记忆B细胞的,通过CD19、mIg-G、mIg-D和S-RBD对PBMC 的细胞分选得到对S-RBD具有特异性记忆B细胞的细胞分选图如图1和图2所示,其中图2中的Batch ID 0428、0505、0522、0528是筛选批次。本实施例采用CD19、mIg-G、mIg-D和S-RBD筛选出针对RBD特异性记忆B细胞的原理在于:将PBMC用去死细胞染料(Dead Dye)、B细胞标记物CD19、记忆B细胞标记物mIg-G阳性和mIg-D阴性以及RBD特异性IgG表达的记忆B细胞进行染色,然后使用流式细胞分析仪将细胞群中CD19细胞群划分出来,再通过从CD19阳性细胞群中划分 mIg-G+mIg-D-细胞群,再从mIg-G+mIg-D-细胞群划分RBD阳性的记忆B细胞,再通过流式细胞分选仪将RBD阳性的记忆B细胞进行分选。
S3、分选得到单个RBD特异性记忆B细胞的mRNA,采用RT-PCR扩增获得抗体可变区cDNA。具体的,使用RT-PCR扩增抗体可变区cDNA时,本实施例所设计的引物的引物前段设计有通用Leader (参见引物序列表一和引物序列表二),有效提高了抗体基因的扩增率,实验结果如图3所示。
S4、采用巢式PCR扩增S1-S3得到的抗体可变区cDNA,构建抗体可变区基因表达盒。
S3和S4总共通过以下六部分进行:(1)提取RBD特异性记忆B细胞的mRNA;(2)单个细胞mRNA逆转录(RT);(3)加G尾(TDT);(4)第一轮PCR(1st PCR);(5)第二轮PCR (2ndPCR);(6)BCR-ORF PCR扩增构建基因表达盒;(7)CMV、WPRE-γ/κ/l片段扩增及CMV、 BCR-Vγ/κ/l((6)的产物)、WPRE-γ/κ/l重叠PCR(Overlap PCR)预连接;(8)BCR-γORF、 BCR-κORF、BCR-lPCR扩增。
各部分反应液配制及反应条件如下:
(1)采用DynabeadsTM mRNA DIRECTTM Purification Kit(ThermoFisherscientific)进行单细胞 mRNA提取,具体包括以下步骤:
①离心:从-80℃冰箱中取出分选有单个RBD特异性记忆B细胞的96孔板后,600×g离心30s,使细胞离心于孔底部;
②清洗:将Dynabeads oligo(dT)25微球瓶取出后涡旋混匀,按照2μl/孔吸取足量微球,放置于磁铁块上,静置30s,弃上清,用500μl的Lysis Buffer重悬;
③配制:按照9μl/孔Lysis Buffer加入到50mL的离心管中,将上述500μl微球悬液加入其中,用枪吹匀;
④分装:用八连管分装微球,随后采用排枪将其按照9μl/孔加入到细胞板中;
⑤润洗:96孔板贴膜,随后润洗管壁四周,共2个循环;
⑥孵育:室温静置5min,使RBD特异性记忆B细胞的mRNA充分释放并结合到微球上,孵育结束后,600×g瞬时离心,使微球离心于孔底部。将96孔板放置于DynaMagTM-96sideMagnet磁板上,用排枪吸弃上清;
⑦Wash A清洗:按照8μl/孔加入Washing Buffer A,来回走板7-8次,使微球充分洗涤,弃上清;
⑧Wash B清洗:按照8μl/孔加入Washing Buffer B,来回走板7-8次,使微球充分洗涤,弃上清,随后按照10μl/孔加入预先配制的逆转录(RT)反应液。试剂配制及反应条件如下述(2)描述。
(2)逆转录(RT)(10μl体系)
所需配制的试剂如下表1所示:
Figure RE-GDA0003920084880000051
Figure RE-GDA0003920084880000061
反应条件:42℃for 60min(每20min混合一次);
反应结束后,600×g瞬时离心96孔板,然后将96孔板放置于DynaMagTM-96sideMagnet磁板上,用排枪吸弃上清,随后按照10μl/孔加入预先配制的TDT反应液,试剂配制及反应条件如下述(3)描述。
(3)加G尾(TDT)(10μl体系)
所需配制的试剂如下表2所示:
试剂名称 体积
H<sub>2</sub>O 6.4μl
5×TdTbuffer 2.0μl
10mMdGTP 0.5μl
0.1%BSA 1.0μl
Sample beads
TdT 0.1μl
总体积 10μl
反应条件:37℃for 40min(每20min混合一次)。
反应结束,600×g瞬时离心96孔板,然后将其放置于DynaMagTM-96side Magnet磁板上,用排枪吸弃上清,随后按照10μl/孔加入预先配制的第一轮PCR(1st PCR)反应液,试剂配制及反应条件如下述(4)描述。
(4)1st PCR(10μl体系)(引物序列参见引物序列表)
所需配制的试剂如下表3所示:
Figure RE-GDA0003920084880000062
Figure RE-GDA0003920084880000071
基于PCR原理,1st PCR的实验反应条件为:①95℃预变性3min;②95℃变性15sec,60℃退火5sec, 72℃延伸1min,30-35cycles,本实施例优选30cycles;③72℃循环外延伸5min,4℃保存。
(5)第二轮PCR(2ndPCR)(10μl体系)(引物序列参见引物序列表一和引物序列表二)
所需配制的试剂如下表4所示:
试剂名称 体积
H<sub>2</sub>O 1.5μl
2×GC Buffer 5μl
2.5mM dNTP 1μl
FP:MAC-AP3/AP3(10μM) 0.5μl
RP:Cg-nest/K20/CI-nest(10μM) 0.5μl
PrimesT AR 0.5μl
sample 1μl
总体积 10μl
基于PCR原理,2ndPCR的实验反应条件为:①95℃预变性3min;②95℃变性15sec,60℃退火5s,72℃延伸1min,30-35cycles,本实施例优选35cycles;72℃循环外延伸5min,4℃保存。
PCR结束后:每孔取4μl进行1.5%琼脂糖凝胶电泳。将Gamma链与Kappa链或Lamada链配对的细胞孔送测序。
(6)抗体表达盒(BCR-ORF)的扩增和构建
PCR扩增启动子区(CMV启动子)、WPRE-γ(抗体gamma链)和WPRE-κ(抗体kappa链),PCR扩增体系如下表5所示:
Figure RE-GDA0003920084880000081
PCR扩增条件为:①95℃预变性3min;②95℃变性15sec,56℃退火15sec,72℃延伸1min, 30cycles;③72℃循环外延伸5min,12℃保存。
(7)CMV、WPRE-γ/κ/l片段扩增及CMV、BCR-Vγ/κ/l、WPRE-γ/κ/l重叠PCR(Overlap PCR) 预连接
实验体系如下表6所示:
Figure RE-GDA0003920084880000082
PCR扩增条件为:95℃预变性3min;95℃变性15sec,50℃退火15sec,72℃延伸1.5min,10cycles; 72℃循环外延伸5min,12℃保存。
(8)BCR-γORF、BCR-κORF、BCR-l PCR扩增
实验体系如下表7所示:
Figure RE-GDA0003920084880000083
Figure RE-GDA0003920084880000091
PCR扩增程序:95℃预变性3min;95℃变性15sec,58℃退火15sec,72℃延伸1.5min,30cycles; 72℃循环外延伸5min,12℃保存。
扩增后,采用琼脂糖凝胶电泳,凝胶成像分析得到的抗体可变区基因大小是否正确,实验结果如图4所示,Marker在中间位置,条带在5000bp处。
BCR-γORF和BCR-κ/ORF乙醇沉淀:BCR-γORF和BCR-κORF的PCR产物各取30μl置于8 连管中,再加入120μl无水乙醇,6μl醋酸钠溶液,充分混匀,-80℃静置30min;10000rpm,离心20min,弃上清,依次用200μl的70%乙醇和无水乙醇各漂洗一次,于56℃乙醇充分挥发,加入40μl无菌水,振荡,使沉淀充分溶解,检测抗体可变区基因的浓度。
S3和S4所用到的Leader引物参见如下的引物序列表一:
Figure RE-GDA0003920084880000092
Figure RE-GDA0003920084880000101
Figure RE-GDA0003920084880000111
S3和S4所用到的所用到J-region引物参见如下的引物序列表二:
primer ID sequence
IGHJ_01 GATGGGCCCTTGGTGGAGGGTGAGGAGACGGTGACCAGGGTGCCCTGGCCCCAGT
IGHJ_02 GATGGGCCCTTGGTGGAGGGTGAGGAGACAGTGACCAGGGTGCCACGGCCCCAGA
IGHJ_03 GATGGGCCCTTGGTGGAGGGTGAAGAGACGGTGACCATTGTCCCTTGGCCCCAGA
IGHJ_04 GATGGGCCCTTGGTGGAGGGTGAGGAGACGGTGACCGTGGTCCCTTGCCCCCAGA
IGKJ_01 GATGGTGCAGCCACAGTTCGTTTGATTTCCACCTTGGTCCCTTGGCCGAACGTCC
IGKJ_02 GATGGTGCAGCCACAGTTCGTTTGATTTCCACCTTGGTCCCTTGGCCGAACGTCC
IGKJ_03 GATGGTGCAGCCACAGTTCGTTTGATATCCACTTTGGTCCCAGGGCCGAAAGTGA
IGKJ_04 GATGGTGCAGCCACAGTTCGTTTGATCTCCACCTTGGTCCCTCCGCCGAAAGTGA
IGKJ_05 GATGGTGCAGCCACAGTTCGTTTAATCTCCAGTCGTGTCCCTTGGCCGAAGGTGA
IGLJ_01 GGGGCAGCCTTGGGCTGACCTAGGACGGTGACCTTGGTCCCAGTTCCGAAGACAT
IGLJ_02 GGGGCAGCCTTGGGCTGACCTAGGACGGTCAGCTTGGTCCCTCCGCCGAATACCA
IGLJ_03 GGGGCAGCCTTGGGCTGACCTAAAATGATCAGCTGGGTTCCTCCACCAAATACAA
IGLJ_04 GGGGCAGCCTTGGGCTGACCTAGGACGGTCAGCTCGGTCCCCTCACCAAACACCC
IGLJ_05 GGGGCAGCCTTGGGCTGACCTAGGACGGTCAGCTCCGTCCCCTCACCAAACACCC
IGLJ_06 GGGGCAGCCTTGGGCTGACCGAGGACGGTCACCTTGGTGCCACTGCCGAACACAT
IGLJ_07 GGGGCAGCCTTGGGCTGACCGAGGACGGTCAGCTGGGTGCCTCCTCCGAACACAG
IGLJ_08 GGGGCAGCCTTGGGCTGACCGAGGGCGGTCAGCTGGGTGCCTCCTCCGAACACAG
S5、将S4得到的抗体可变区基因表达盒转导入293T细胞48小时内表达抗体并收集上清,用 ELISA法检测上清的RBD特异性,筛选RBD特异性全人源单克隆抗体。
(A)使用PBS稀释抗原(终浓度2μg/mL),10μl/孔,包被384孔ELISA板4℃过夜或37℃包被 2h(本实施例优选4℃过夜)。NOTE:加完后瞬时离心保证液体在底部。
实验体系如下表8所示:
试剂名称 货号 原浓度 终浓度 稀释比
SARS-COV-2RBD Cat:40592-V08H 200μg/mL 2μg/mL 1:100
Goat pab to Hu IgG-ALP Cat:ab97221 1mg/mL 2μg/mL 1:500
(B)配制PBST(0.05%Tween 20,Cat#TB220):1L的PBS加入0.5mL的Tween 20;
PBST机洗板子(Thermoscientific wellwash versa)或者手洗(机洗完的板子依然要手动拍板/使用微孔板离心机(MPC-P25)离心1min,使板子看不见有水和气泡)。
封闭:80μl的5%BSA(BioFroxx,Cat.NO:4240GR100)(PBST配制)加入上述洗好的板子里,放置于37℃的孵育箱孵育1h。PBST机洗板子或者手洗。
(C)加样及标准品。其中,标准品:10μl/well原浓度1μg/mL,梯度稀释为250ng/mL、125ng/mL、 62.5ng/mL、31.25ng/mL、15.63ng/mL、7.81ng/mL、3.9ng/mL和1.95ng/mL。(封闭液稀释);样品:转染抗体基因的细胞上清液。阴性对照/空白孔:封闭液10μl/well。
在37℃孵育30min。PBST机洗板子或者手洗。
(D)加二抗,加入的浓度为10μl/well,然后在37℃下孵育30min。
实验体系如下表9所示:
二抗名称 货号 原浓度 终浓度 稀释比
goat-anti-human IgG-ALP A18808 1.5mg/ml 0.3μg/ml 1:5000
Goat pab to Hu IgG-ALP Ab98532 0.5mg/ml 0.25μg/ml 1:2000
PBST机洗板子或者手洗。10μl/well的PNPP(对硝基苯磷酸二钠),使用(Thermoscientific Muttiskan GO)检测5min、10min、15min、20min、25min、30min、35min、40min、45min、50min、55min和 60min的OD(450mm)值。50mg的PNPP粉末(Thermo,Prod#34045)+40mL的ddH2O+10mL的 Diethanol aminesubstrate Buffer(5X),PNPP避光4℃储存。
实验结果如图5所示,图5中OD值大于0.1为阳性。
以上所述仅为本发明的优选实施例,对本发明而言仅是说明性的,而非限制性的;本领域普通技术人员理解,在本发明权利要求所限定的精神和范围内可对其进行许多改变,修改,甚至等效变更,但都将落入本发明的保护范围内。
<110>重庆医科大学,冯玉林
<120>新冠病毒RBD特异性单克隆抗体和应用
<160>20
<210>1
<211>125
<212>PRT
<213>人工序列(Artificial Sequence)
<400>1
Glu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Pro Gly
1 5 10 15
Gly Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Thr Phe Ser
20 25 30
Asn Tyr Asp Met His Trp Val Arg Gln Gly Thr Gly Lys Gly
35 40
Leu Glu Trp Val Ser Ala Ile Gly Thr Ala Gly Asp Thr Tyr Tyr
45 50 55
Pro Gly Ser Val Lys Gly Arg Phe Thr Ile Ser Arg Glu Asn Ala
60 65 70
Lys Asn Ser Leu Tyr Leu Gln Met Asn Ser Leu Arg Ala Gly
75 80 85
Asp Thr Ala Leu Tyr Tyr Cys Ala Arg Val Gly Tyr Tyr Gly Ser
90 95 100
Gly Ser Tyr Pro Leu Tyr Trp Tyr Phe Asp Leu Trp Gly Arg Gly
105 110 115
Thr Leu Val Thr Val Ser Ser
120 125
<210>2
<211>108
<212>PRT
<213>人工序列(Artificial Sequence)
<400>2
Asp Ile Gln Met Thr Pro Ser Pro Ser Ser Leu Ser Ala Ser Val
1 5 10 15
Gly Asp Arg Val Thr Ile Thr Cys Arg Ala Ser Gln Ser Ile Ser
20 25 30
Ile Tyr Leu Asn Trp Tyr Gln Gln Lys Pro Gly Lys Ala Pro Lys
35 40 45
Leu Leu Ile Tyr Ala Ala Ser Asn Leu Gln Ser Gly Val Pro Ser
50 55 60
Arg Phe Ser Gly Ser Gly Ser Gly Thr Glu Phe Thr Leu Thr Ile
65 70 75
Ser Ser Leu Gln Pro Glu Asp Phe Ala Thr Tyr Phe Cys Gln Gln
80 85 90
Ser Tyr Ser Ala Pro Pro Trp Thr Phe Gly Gln Gly Thr Arg Val
95 100 105
Glu Ile Arg
<210>3
<211>120
<212>PRT
<213>人工序列(Artificial Sequence)
<400>3
Glu Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly
1 5 10 15
Glu Ser Leu Lys Ile Ser Cys Gln Gly Ser Gly Phe Ser Phe Ser
20 25 30
Asn Tyr Trp Ile Gly Trp Val Arg Gln Met Pro Gly Lys Gly Leu
35 40 45
Glu Trp Met Gly Ile Ile Tyr Pro Asp Asp Ser Asp Thr Arg Tyr
50 55 60
Ser Pro Ser Phe Gln Gly Gln Val Thr Ile Ser Ala Asp Lys Ser
65 70 75
Ile Ser Thr Ala Phe Leu Gln Trp Ser Ser Leu Lys Ala Ser Asp
80 85 90
Thr Ala Met Tyr Tyr Cys Ala Thr Arg Thr Gly Trp Thr Asn
95 100
Asp Ala Phe Asp Ile Trp Gly Gln Gly Thr Met Val Thr Val Ser
105 110 115
Ser
120
<210>4
<211>107
<212>PRT
<213>人工序列(Artificial Sequence)
<400>4
Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser Val
1 5 10 15
Gly Asp Arg Val Thr Ile Thr Cys Arg Ala Ser Gln Ser Ile Ser
20 25 30
Ser Ser Leu Asn Trp Tyr His Gln Lys Pro Gly Lys Ala Pro Lys
35 40 45
Leu Leu Ile Tyr Ala Ala Ser Ser Leu Gln Ser Gly Val Pro Ser
50 55 60
Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr Ile
65 70 75
Ser Ser Leu Gln Pro Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln
80 85 90
Ser Tyr Ser Thr Pro Cys Thr Phe Gly Gln Gly Thr Lys Leu Glu
95 100 105
Ile Lys
<210>5
<211>118
<212>PRT
<213>人工序列(Artificial Sequence)
<400>5
Gln Val Thr Leu Arg Glu Ser Gly Pro Ala Leu Val Lys Pro Thr
1 5 10 15
Gln Thr Leu Thr Leu Thr Cys Thr Phe Ser Gly Phe Ser Leu Ser
20 25 30
Thr Ser Gly Met Cys Val Ser Trp Ile Arg Gln Pro Pro Gly Lys
35 40 45
Ala Leu Glu Trp Leu Ala Arg Ile Asp Trp Asp Asp Asp Lys Tyr
50 55 60
Tyr Ser Thr Ser Leu Arg Thr Arg Leu Thr Ile Ser Lys Asp Thr
65 70 75
Ser Lys Asn Leu Val Val Leu Thr Met Thr Asn Met Asp Pro
80 85
Val Asp Thr Ala Thr Tyr Tyr Cys Ala Leu Gly Arg Ala Gly Thr
90 95 100
Met Asp Tyr Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser
105 110 115
<210>6
<211>107
<212>PRT
<213>人工序列(Artificial Sequence)
<400>6
Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser Val
1 5 10 15
Gly Asp Arg Val Thr Ile Thr Cys Arg Ala Ser Gln Ser Ile Arg
20 25 30
Ser Tyr Leu Asn Trp Tyr Gln Gln Lys Pro Gly Lys Ala Pro Lys
35 40 45
Val Leu Ile Tyr Ala Ala Ser Ser Leu Gln Ser Gly Val Pro Ser
50 55 60
Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr Ile
65 70 75
Ser Ser Leu Gln Pro Gly Asp Phe Ala Thr Tyr Tyr Cys Gln Gln
80 85 90
Ser Tyr Ser Pro Pro Tyr Thr Phe Gly Gln Gly Thr Lys Leu Glu
95 100 105
Ile Lys
<210>7
<211>122
<212>PRT
<213>人工序列(Artificial Sequence)
<400>7
Glu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Pro Gly
1 5 10 15
Arg Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Thr Phe Asp
20 25 30
Asp Tyr Ala Met His Trp Val Arg Gln Ala Pro Gly Lys Gly Leu
35 40 45
Glu Trp Val Ser Gly Ile Ser Trp Ser Ser Gly Ser Ile Val Tyr
50 55 60
Ala Asp Ser Val Lys Gly Arg Phe Thr Val Ser Arg Asp Asn Ala
65 70 75
Lys Asn Ser Leu Tyr Leu Gln Met Asn Ser Leu Arg Val Glu
80 85
Asp Thr Ala Phe Tyr Tyr Cys Ala Lys Asp Met Val Ala Gly Pro
90 95 100
His Tyr Tyr Gly Met Asp Val Trp Gly Gln Gly Thr Thr Val Thr
105 110 115
Val Ser Ser
120
<210>8
<211>110
<212>PRT
<213>人工序列(Artificial Sequence)
<400>8
Arg Ser Val Leu Thr Gln Pro Pro Ser Ala Ser Gly Thr Pro Gly
1 5 10 15
Gln Arg Val Thr Ile Ser Cys Ser Gly Ser Ser Ser Asn Ile Gly
20 25 30
Ser Asn Thr Val Asn Trp Tyr Gln Gln Leu Pro Gly Thr Ala Pro
35 40 45
Lys Leu Leu Ile Tyr Asn Asn Asn Gln Arg Pro Ser Gly Val Pro
50 55 60
Asp Arg Phe Ser Gly Ser Lys Ser Gly Thr Ser Ala Ser Leu Ala
65 70 75
Ile Ser Gly Leu Gln Ser Glu Asp Glu Ala Asp Tyr Ser Cys Ala
80 85 90
Ala Trp Asp Asp Ser Leu Asn Gly Trp Val Phe Gly Gly Gly
95 100
Thr Lys Leu Thr Val Leu
105 110
<210>9
<211>126
<212>PRT
<213>人工序列(Artificial Sequence)
<400>9
Glu Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly
1 5 10 15
Glu Ser Leu Lys Ile Ser Cys Lys Ala Ser Gly Tyr Arg Phe Thr
20 25 30
Asn Tyr Trp Thr Val Trp Val Arg Gln Met Pro Gly Lys Gly Leu
35 40 45
Glu Trp Met Gly Ile Ile Tyr Pro Gly Asp Ser Glu Ile Arg Tyr
50 55 60
Ser Pro Pro Phe Gln Gly Gln Val Thr Ile Ser Ala Asp Lys Ser
65 70 75
Ile Ser Thr Ala Tyr Leu Gln Trp Ser Ser Leu Lys Ala Ser Asp
80 85 90
Thr Ala Met Tyr Tyr Cys Ala Arg His Pro Ser Asn Phe Tyr Asp
95 100 105
Ser Gly Gly Asp Tyr Tyr Ala Met Asp Val Trp Gly Gln Gly Thr
110 115 120
Pro Val Thr Val Ser Ser
125
<210>10
<211>110
<212>PRT
<213>人工序列(Artificial Sequence)
<400>10
Gln Ser Ala Leu Thr Gln Pro Ala Ser Val Ser Gly Ser Pro Gly
1 5 10 15
Gln Ser Ile Thr Ile Ser Cys Thr Gly Thr Ser Ser Asn Val Gly
20 25 30
Asn Tyr Asp Leu Val Ser Trp Tyr Gln Gln His Pro Gly Lys Ala
35 40 45
Pro Lys Leu Met Ile Tyr Glu Val Asn Lys Arg Pro Ser Gly Val
50 55 60
Ser Asp Arg Phe Ser Gly Ser Lys Ser Gly Asn Thr Ala Ser Leu
65 70 75
Thr Ile Ser Gly Leu Gln Ala Glu Asp Glu Ala Asp Phe Tyr Cys
80 85 90
Cys Ser Tyr Ala Gly Ser Ser Ser Trp Val Phe Gly Gly Gly Thr
95 100 105
Lys Val Thr Val Leu
110
<210>11
<211>123
<212>PRT
<213>人工序列(Artificial Sequence)
<400>11
Glu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Pro Gly
1 5 10 15
Gly Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Thr Val Ile
20 25 30
Ser Asn Tyr Met Ser Trp Val Arg Gln Ala Pro Gly Lys Gly Leu
35 40 45
Glu Trp Val Ser Val Ile Tyr Arg Gly Gly Ser Thr Tyr Phe Ala
50 55 60
Asp Ser Val Lys Gly Arg Phe Thr Ile Ser Arg Asp Asn Ser Lys
65 70 75
Asn Thr Leu Tyr Leu Gln Met Asn Ser Leu Arg Ala Glu Asp
80 85
Thr Ala Val Tyr Tyr Cys Ala Arg Leu Ala Ser Asp Gly Ser Gly
90 95 100
Ser Tyr Leu Asp Tyr Phe Asp Tyr Trp Gly Gln Gly Thr Leu Val
105 110 115
Thr Val Ser Ser
120
<210>12
<211>112
<212>PRT
<213>人工序列(Artificial Sequence)
<400>12
Gln Ser Val Leu Thr Gln Pro Pro Ser Val Ser Gly Ala Pro Gly
1 5 10 15
Gln Arg Val Thr Ile Ser Cys Thr Gly Ser Ser Ser Asn Ile Gly
20 25 30
Ala Asp Tyr Asp Val His Trp Tyr Gln Gln Phe Pro Gly Thr Ala
35 40 45
Pro Lys Leu Leu Ile Tyr Gly Asn Ser Asn Arg Pro Ser Gly Val
50 55 60
Pro Asp Arg Phe Ser Gly Ser Lys Ser Gly Thr Ser Ala Ser Leu
65 70 75
Ala Ile Thr Gly Leu Gln Ala Glu Asp Glu Ala Asp Tyr Tyr Cys
80 85 90
Gln Ser Tyr Asp Ser Ser Leu Ser Gly Ser Trp Val Phe Gly Gly
95 100 105
Gly Thr Lys Leu Thr Val Leu
110
<210>13
<211>120
<212>PRT
<213>人工序列(Artificial Sequence)
<400>13
Glu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Pro Gly
1 5 10 15
Arg Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Thr Phe Asp
20 25 30
Asp Tyr Ala Met His Trp Val Arg Gln Ala Pro Gly Lys Gly Leu
35 40 45
Glu Trp Val Ser Gly Ile Ser Trp Asn Ser Asp Ser Ile Gly Tyr
50 55 60
Ala Asp Ser Val Lys Gly Arg Phe Thr Ile Ser Arg Asp Asn Ala
65 70 75
Lys Asn Ser Leu Tyr Leu Gln Met Asn Ser Leu Arg Ala Glu
80 85
Asp Thr Ala Leu Tyr Tyr Cys Ala Lys Asp Leu Ser Ser Gly Trp
90 95 100
Asp Leu Phe Asp Tyr Trp Gly Gln Gly Thr Leu Val Thr Val Ser
105 110 115
Ser
120
<210>14
<211>108
<212>PRT
<213>人工序列(Artificial Sequence)
<400>14
Ser Tyr Val Leu Thr Gln Pro Pro Ser Val Ser Val Ala Pro Gly
1 5 10 15
Lys Thr Ala Arg Ile Thr Cys Gly Gly Asn Asn Ile Gly Ser Lys
20 25 30
Ser Val His Trp Tyr Gln Gln Lys Pro Gly Gln Ala Pro Val Leu
35 40 45
Val Ile Tyr Tyr Asp Ser Asp Arg Pro Ser Gly Ile Pro Glu Arg
50 55 60
Phe Ser Gly Ser Asn Ser Gly Asn Thr Ala Thr Leu Ser Ile Ser
65 70 75
Arg Val Glu Ala Gly Asp Glu Ala Gly Tyr Tyr Cys Gln Val Trp
80 85 90
Asp Thr Ser Gly Asp Pro Leu Val Phe Gly Gly Gly Thr Lys
95 100
Leu Thr Val Leu
105
<210>15
<211>127
<212>PRT
<213>人工序列(Artificial Sequence)
<400>15
Gln Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly
1 5 10 15
Ser Ser Val Lys Val Ser Cys Lys Ala Ser Gly Gly Thr Phe Ser
20 25 30
Ser Tyr Ala Ile Ser Trp Val Arg Gln Ala Pro Gly Gln Gly Leu
35 40 45
Glu Trp Met Gly Gly Ile Ile Pro Ile Phe Gly Thr Ala Asn Tyr
50 55 60
Ala Gln Lys Phe Gln Gly Arg Val Thr Ile Thr Ala Asp Glu Ser
65 70 75
Thr Ser Thr Ala Tyr Met Glu Leu Ser Ser Leu Arg Ser Glu Asp
80 85 90
Thr Ala Val Tyr Tyr Cys Ala Thr Asp Gly Gly Gly Gly Ser Tyr
95 100 105
Tyr Tyr Ala His Tyr Tyr Tyr Gly Met Asp Val Trp Gly Gln Gly
110 115 120
Thr Thr Val Thr Val Ser Ser
125
<210>16
<211>110
<212>PRT
<213>人工序列(Artificial Sequence)
<400>16
Gln Thr Val Val Thr Gln Glu Pro Ser Phe Ser Val Ser Pro Gly
1 5 10 15
Gly Thr Val Thr Leu Thr Cys Gly Leu Ser Ser Gly Ser Val Pro
20 25 30
Thr Ser Tyr Phe Pro Ser Trp Tyr Gln Gln Thr Pro Gly Gln Ala
35 40 45
Pro Arg Thr Leu Ile Tyr Gly Thr Asn Thr Arg Ser Ser Gly Val
50 55 60
Pro Asp Arg Phe Ser Gly Ser Ile Leu Gly Asn Lys Ala Ala Leu
65 70 75
Thr Ile Thr Gly Ala Gln Ala Asp Asp Glu Ser Asp Tyr Tyr Cys
80 85 90
Val Leu Tyr Met Gly Ser Gly Ile Val Val Phe Gly Gly Gly Thr
95 100 105
Lys Leu Thr Val Leu
110
<210>17
<211>120
<212>PRT
<213>人工序列(Artificial Sequence)
<400>17
Glu Val Gln Leu Val Gln Ser Gly Ala Glu Val Lys Lys Pro Gly
1 5 10 15
Glu Ser Leu Lys Ile Ser Cys Glu Gly Ser Gly Tyr Ser Phe Ile
20 25 30
Ser Tyr Trp Ile Gly Trp Val Arg Gln Met Pro Gly Lys Gly Leu
35 40 45
Glu Trp Met Gly Ile Ile Tyr Pro Gly Asp Ser Asp Thr Arg Tyr
50 55 60
Ser Pro Ser Phe Gln Gly Gln Val Thr Ile Ser Ala Asp Arg Ser
65 70 75
Ile Ser Thr Ala Tyr Leu Gln Trp Ser Ser Leu Lys Ala Ser Asp
80 85 90
Thr Ala Met Tyr Tyr Cys Val Arg Ser Asp Gly Asp Tyr Val Ile
95 100 105
Gly His Asp Tyr Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser
110 115 120
<210>18
<211>110
<212>PRT
<213>人工序列(Artificial Sequence)
<400>18
Gln Ser Val Leu Thr Gln Pro Pro Ser Ala Ser Gly Thr Pro Gly
1 5 10 15
Gln Arg Val Thr Ile Ser Cys Ser Gly Ser Ser Ser Asn Ile Gly
20 25 30
Gly Asn Thr Val Asn Trp Tyr Gln Gln Leu Pro Gly Thr Ala Pro
35 40 45
Lys Leu Leu Ile Tyr Asn Asn Asn Gln Arg Pro Ser Gly Val Pro
50 55 60
Asp Arg Phe Ser Gly Ser Lys Ser Gly Thr Ser Ala Ser Leu Ala
65 70 75
Ile Ser Gly Leu Gln Ser Glu Asp Glu Ala Asp Tyr Tyr Cys Ala
80 85 90
Thr Trp Asp Asp Ser Leu Asn Gly Arg Val Phe Gly Gly Gly
95 100
Thr Lys Leu Thr Val Leu
105 110
<210>19
<211>124
<212>PRT
<213>人工序列(Artificial Sequence)
<400>19
Glu Met Gln Leu Val Glu Ser Gly Gly Gly Leu Val Gln Pro Gly
1 5 10 15
Gly Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Thr Phe Ser
20 25 30
Thr Tyr Glu Met Asn Trp Val Arg Gln Ala Pro Gly Lys Gly Leu
35 40 45
Glu Trp Val Ser Tyr Ile Ser Ser Ser Thr Asn Ser Ile Tyr Tyr
50 55 60
Ala Gly Ser Val Gln Gly Arg Phe Thr Ile Ser Arg Gly Asn Ala
65 70 75
Lys Asn Ser Leu Tyr Leu Gln Met Asn Ser Leu Arg Ala Glu
80 85
Asp Thr Ala Val Tyr Tyr Cys Ala Arg Gly Arg Asp Asp Tyr
90 95 100
Gly Asp Tyr Arg Gly Gly Asp Phe Asp Tyr Trp Gly Gln Gly
105 110 115
Thr Leu Val Thr Val Ser Ser
120
<210>20
<211>108
<212>PRT
<213>人工序列(Artificial Sequence)
<400>20
Gln Ile Val Leu Thr Gln Ser Pro Ala Thr Leu Ser Leu Ser Pro
1 5 10 15
Gly Glu Arg Ala Thr Leu Ser Cys Arg Ala Ser Gln Ser Val Thr
20 25 30
Thr Tyr Leu Ala Trp Tyr Gln Gln Lys Pro Gly Gln Ala Pro Arg
35 40 45
Leu Leu Ile Tyr Asp Ala Ser His Arg Ala Thr Gly Ile Pro Ala
50 55 60
Arg Phe Ser Gly Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr Ile
65 70 75
Ser Ser Leu Glu Pro Glu Asp Phe Ala Val Tyr Tyr Cys Gln Gln
80 85 90
Arg Ser Asn Trp Pro Pro Ile Thr Phe Gly Pro Gly Thr Lys Val
95 100 105
Glu Ile Lys

Claims (10)

1.一种新冠病毒RBD特异性单克隆抗体,其特征在于,重链氨基酸序列还可如SEQ IDNO:1所示;轻链氨基酸序列还可如SEQ ID NO:2所示。
2.根据权利要求1所述的新冠病毒RBD特异性单克隆抗体,其特征在于,重链氨基酸序列还可如SEQ ID NO:3所示;轻链氨基酸序列还可如SEQ ID NO:4所示。
3.根据权利要求1所述的新冠病毒RBD特异性单克隆抗体,其特征在于,重链氨基酸序列还可如SEQ ID NO:5所示;轻链氨基酸序列还可如SEQ ID NO:6所示。
4.根据权利要求1所述的新冠病毒RBD特异性单克隆抗体,其特征在于,重链氨基酸序列还可如SEQ ID NO:7所示;轻链氨基酸序列还可如SEQ ID NO:8所示。
5.根据权利要求1所述的新冠病毒RBD特异性单克隆抗体,其特征在于,重链氨基酸序列还可如SEQ ID NO:9所示;轻链氨基酸序列还可如SEQ ID NO:10所示。
6.根据权利要求1所述的新冠病毒RBD特异性单克隆抗体,其特征在于,重链氨基酸序列还可如SEQ ID NO:11所示;轻链氨基酸序列还可如SEQ ID NO:12所示。
7.根据权利要求1所述的新冠病毒RBD特异性单克隆抗体,其特征在于,重链氨基酸序列还可如SEQ ID NO:13所示;轻链氨基酸序列还可如SEQ ID NO:14所示。
8.根据权利要求1所述的新冠病毒RBD特异性单克隆抗体,其特征在于,重链氨基酸序列还可如SEQ ID NO:15所示;轻链氨基酸序列还可如SEQ ID NO:16所示。
9.根据权利要求1所述的新冠病毒RBD特异性单克隆抗体,其特征在于,重链氨基酸序列还可如SEQ ID NO:17所示;轻链氨基酸序列还可如SEQ ID NO:18所示。
10.根据权利要求1所述的新冠病毒RBD特异性单克隆抗体,其特征在于,重链氨基酸序列还可如SEQ ID NO:19所示;轻链氨基酸序列还可如SEQ ID NO:20所示。
CN202210507397.8A 2020-08-19 一种rbd特异性单克隆抗体和应用 Active CN115477698B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210507397.8A CN115477698B (zh) 2020-08-19 一种rbd特异性单克隆抗体和应用

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210507397.8A CN115477698B (zh) 2020-08-19 一种rbd特异性单克隆抗体和应用
CN202010839234.0A CN111925440B (zh) 2020-08-19 2020-08-19 新冠病毒rbd特异性单克隆抗体和应用

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN202010839234.0A Division CN111925440B (zh) 2020-08-19 2020-08-19 新冠病毒rbd特异性单克隆抗体和应用

Publications (2)

Publication Number Publication Date
CN115477698A true CN115477698A (zh) 2022-12-16
CN115477698B CN115477698B (zh) 2024-10-25

Family

ID=

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109666070A (zh) * 2017-10-13 2019-04-23 清华大学 单克隆抗体mers-4v2及其编码基因和应用
CN111303280A (zh) * 2020-03-22 2020-06-19 中国人民解放军军事科学院军事医学研究院 高中和活性抗SARS-CoV-2全人源单克隆抗体及应用
US20200237689A1 (en) * 2018-11-15 2020-07-30 Bluewillow Biologics, Inc. Prevention and treatment of coronavirus and other respiratory infections using nanoemulsion compositions
US10729735B1 (en) * 2016-09-14 2020-08-04 Phoenix Biotechnology, Inc. Method and compostitions for treating coronavirus infection

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10729735B1 (en) * 2016-09-14 2020-08-04 Phoenix Biotechnology, Inc. Method and compostitions for treating coronavirus infection
CN109666070A (zh) * 2017-10-13 2019-04-23 清华大学 单克隆抗体mers-4v2及其编码基因和应用
US20200237689A1 (en) * 2018-11-15 2020-07-30 Bluewillow Biologics, Inc. Prevention and treatment of coronavirus and other respiratory infections using nanoemulsion compositions
CN111303280A (zh) * 2020-03-22 2020-06-19 中国人民解放军军事科学院军事医学研究院 高中和活性抗SARS-CoV-2全人源单克隆抗体及应用

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
WANBO TAI等: "Characterization of the receptor-binding domain (RBD) of 2019 novel coronavirus: implication for development of RBD protein as a viral attachment inhibitor and vaccine", 《CELLULAR & MOLECULAR IMMUNOLOGY》, 19 March 2020 (2020-03-19) *
XIANGYU CHEN 等: "Human monoclonal antibodies block the binding of SARS-CoV-2 spike protein to angiotensin converting enzyme 2 receptor", 《CELLULAR & MOLECULAR IMMUNOLOG》, vol. 17, 20 April 2020 (2020-04-20), pages 647, XP037433894, DOI: 10.1038/s41423-020-0426-7 *
郭振宇等: "新型冠状病毒疫苗研究进展", 《中国病毒病杂志》, no. 4, 20 July 2020 (2020-07-20) *

Also Published As

Publication number Publication date
CN115925902A (zh) 2023-04-07
CN111925440B (zh) 2022-09-09
CN111925440A (zh) 2020-11-13

Similar Documents

Publication Publication Date Title
CN111909260B (zh) 新冠病毒rbd特异性单克隆抗体和应用
CN111909263B (zh) 新冠病毒rbd特异性单克隆抗体和应用
CN111909261B (zh) 新冠病毒rbd特异性单克隆抗体和应用
CN111925440B (zh) 新冠病毒rbd特异性单克隆抗体和应用
CN111925444B (zh) 新冠病毒rbd特异性单克隆抗体和应用
CN111925443B (zh) 新冠病毒rbd特异性单克隆抗体和应用
CN111925441B (zh) 新冠病毒rbd特异性单克隆抗体和应用
CN111925442B (zh) 新冠病毒rbd特异性单克隆抗体和应用
CN111909262B (zh) 新冠病毒rbd特异性单克隆抗体和应用
CN115477698B (zh) 一种rbd特异性单克隆抗体和应用
CN115925898B (zh) 新型冠状病毒rbd特异性单克隆抗体和应用
CN115340601B (zh) 新冠病毒rbd特异性单克隆抗体和应用
CN115925896B (zh) 新型冠状病毒rbd特异性单克隆抗体和应用

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