CN108743968A - 半胱氨酸改造的抗体-毒素偶联物(tdc)定点偶联位点筛选 - Google Patents

半胱氨酸改造的抗体-毒素偶联物(tdc)定点偶联位点筛选 Download PDF

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CN108743968A
CN108743968A CN201810621781.4A CN201810621781A CN108743968A CN 108743968 A CN108743968 A CN 108743968A CN 201810621781 A CN201810621781 A CN 201810621781A CN 108743968 A CN108743968 A CN 108743968A
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CN108743968B (zh
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朱义
王茜
王一茜
卓识
李�杰
余永国
万维李
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Chengdu Bailidote Biological Pharmaceutical Co ltd
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Sichuan Baili Pharmaceutical Co Ltd
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Abstract

本发明公开了一种半胱氨酸改造的抗体‑毒素偶联物，其特征在于：抗体为半胱氨酸定点插入抗体，半胱氨酸插入位点包含选自以下位点的一个或多个：kappa/λ轻链恒定区轻链第110位、第111位、第142位，IgG抗体重链恒定区重链第254位、第255位、第258位、第259位、第354位、第355位、第357位、第378位、第379位、第386位、第387位或第410位。

Description

半胱氨酸改造的抗体-毒素偶联物(TDC)定点偶联位点筛选
技术领域
本发明涉及一种化合物及其制备方法和用途，特别涉及一类半胱氨酸改造的抗体-毒素偶联物(TDC)及其制备方法和用途。
技术背景：
抗体-毒素偶联物(Antibody drug conjugate,ADC)是靶向治疗的热点领域，已在美国获批上市的两个药物Adcetris和Kadcyla表现出良好的临床疗效，并且有超过50个ADC药物在进行临床阶段研究。此专利披露的全新半胱氨酸改造的抗体- 毒素偶联物(TDC)相较非定点偶联的ADC具有药物均一性好，副作用小等优点，临床前研究结果显示其显著优于非定点偶联ADC。
发明内容：
本发明的化合物半胱氨酸改造的抗体-毒素偶联物(TDC)，半胱氨酸插入位点包含选自以下15个插入位点的一个或多个位点：轻链第110位(Kabat编号，其氨基酸序列EIKRTCVAAPS)、轻链第111位(Kabat编号，其氨基酸序列IKRTVCAAPSV)、轻链第142位(Kabat编号，其氨基酸序列NNFYPCREAKV)，重链第254位(其氨基酸序列为ISRTPCEVTCV)、重链第255位(其氨基酸序列为SRTPECVTCVV)、重链第 258位(其氨基酸序列为PEVTCCVVVDV)、重链第259位(其氨基酸序列为 EVTCVCVVDVS)、重链第354位(其氨基酸序列为PSRDECLTKNQ)、重链第355位(其氨基酸序列为SRDELCTKNQV)、重链第357位(其氨基酸序列为DELTKCNQVSL)、重链第378位(其氨基酸序列为IAVEWCESNGQ)、重链第379位(其氨基酸序列为AVEWECSNGQP)、重链第386位(其氨基酸序列为GQPENCNYKTT)、重链第387位(其氨基酸序列为QPENNCYKTTP)、重链第410位(其氨基酸序列为KLTVDCKSRWQ)。包含一个或多个上述半胱氨酸插入突变的抗体保持了其亲本抗体与抗原结合的能力 (亲和力)。通过其轻链插入的半胱氨酸巯基或/和重链插入的半胱氨酸巯基与 payload进行抗体-毒素偶联物(TDC)定点偶联，毒素比抗体比例DAR为1.6-2.0 或3.2-4.0。
实施例
实施例1mc的合成
于30ml冰醋酸中加入6-氨基己酸3.9g(0.03mol)和1.2eq的马来酸酐 3.5g(0.036mol)。反应液于120℃搅拌反应4～6h。反应完毕后，停止加热，自然冷却到室温。60℃减压浓缩除去大部分醋酸。所得棕黄色粘稠液倒入水中，再加入乙酸乙酯20ml×3萃取，合并有机层。有机层依次用水、饱和食盐水洗涤，无水硫酸钠干燥，过滤，滤液减压浓缩得到棕黄色油状物，加入50ml水搅拌，有类白色固体析出，过滤，50℃减压干燥的目标产品5.08g，收率80％。mp：89-92℃。m/z：212.2 [M+H]+。1HNMR(400Mz,DMSO)：13.21(br,1H,COOH)、6.75(s,2H,COCH＝CHCO)、 3.63(t,2H,J＝7.2Hz,NCH2CH2)、2.42(t,2H,J＝7.4Hz,CH2COOH)、1.52-1.68 (m,4H,NCH2CH2CH2CH2)、1.30-1.42(m,2H,NCH2CH2CH2CH2)。
实施例2Mc-OSu的合成
在氮气保护下于50ml乙腈中加入4.7g(22mmol)MC和25g(22mmol)HOSu。另取4.5g(22mmol)DCC溶于25ml乙腈中，保持内温在0℃左右，将其缓慢滴入反应液中。反应液于0℃反应2小时后再室温反应过夜。过滤，滤饼用乙腈10ml×3洗涤，滤液减压浓缩至干。所得油状物于室温减压干燥6h得到浅棕色固体6.4g，收率95％。(不纯化直接投下一步反应)m/z：309.2[M+H]+。1HNMR(400Mz,CDCl3)： 1～2(m,6H,CCH2CH2CH2C)、2.68(t,2H,CH2CO)，2.95(s,4H,COCH2CH2CO)、3.68 (t,2H,CH2N)、6.81(s,2H,CH＝CH)。
实施例3Fmoc-Val-OSu的合成
于100mlTHF中加入Fmoc-Val 10g和HOSu 3.4g。另取DCC6g溶于50ml乙腈中，保持内温在0℃左右，将其缓慢滴入反应液中。反应液于室温搅拌反应24小时。过滤，滤饼用THF洗涤，滤液减压浓缩得到透明油状物。油状物未经纯化直接投下一步反应。m/z：437.4[M+H]+
实施例4.Fmoc-vc的合成
于20mlTHF中加入Cit 4.0g(1.05eq)和碳酸氢钠的水溶液60ml(NaHCO3 2g,1.05eq)。另取22.35mmolFmoc-Val-OSu溶于60mlDME中，再将其加入反应液中。反应液于室温下搅拌反应24小时。反应完毕后，向体系中加入15％柠檬酸水溶液110ml，然后再用EA萃取两次，合并有机层，减压浓缩得到白色固体。并向白色固体中加入甲基叔丁基醚100ml搅洗，过滤，滤饼于40℃减压干燥4h得产品4.83g，收率65％。m/z： 497.6(M+H)+。1HNMR(400Mz,DMSO):0.92(6H,m)、1.35～1.65(4H,m)、2.10(1H, m)、3.01(2H,q)、3.99(1H,t)、4.01-4.45(2H,m)、4.45(2H,t)、5.46(2H, br)、6.03(1H,t)、7.20-8.02(8H,m)、8.25(1H,d)。
实施例5.Fmoc-vc-PABOH的合成
于反应瓶中加入DCM/MeOH＝2/1混合溶剂60ml，再加入Fmoc-vc 2g(4.2mmol)和PABOH 1.04g(2eq)，搅拌溶解部分后再加入EEDQ 2.0g(2eq)。反应体系在室温条件下避光搅拌反应2.0d。反应完毕后，40℃减压浓缩得到白色固体。收集白色固体，加入甲基叔丁基醚100ml搅洗，过滤，滤饼用甲基叔丁基醚洗涤，所得白色固体40℃减压干燥得到2.2g，收率约88％。m/z：602.6(M+H)+。1HNMR(400Mz,DMSO): 0.95(6H,m)、1.45～1.69(4H,m)、2.10(1H,m)、3.11(2H,m)、3.99(1H,m)、 4.30(2H,d)、4.05～-4.66(2H,m)、4.55(2H,d)、5.21(1H,t)、5.51(2H,br)、 6.11(1H,t)、7.09-8.10(12H,m)、8.21(1H,d)、10.51(1H,br)。
实施例6.vc-PABOH的合成
于10mlNMP中加入Fmoc-vc-PABOH 490mg(0.815mmol)搅拌溶解，再加入二乙胺2ml。于室温下搅拌反应24h。反应完毕后，于40℃减压浓缩，所得油状物中加入20mlDCM搅拌析晶，过滤，滤饼用DCM洗涤，所得固体减压干燥得到277mg,收率90％。m/z：380.2(M+H)+。1HNMR(400Mz,DMSO):0.89(6H,m),1.31～1.61(4H, m),1.82(1H,m),2.86(1H,m),2.89(2H,d),4.38(2H,d),4.44(1H,m),5.01 (1H,br),5.35(2H,br),5.84(1H,br),7.14(2H,d),7.42(2H,d),8.08(1H, br),9.88(1H,br)。
实施例7.mc-vc-PABOH的合成
于10mlNMP中加入vc-PABOH 205mg(0.54mmol)和MC-OSu 184mg(1.1eq)，加毕于室温下搅拌反应24h。反应完毕，于40℃减压浓缩，所得油状物中加入20ml甲基叔丁基醚搅拌析晶。过滤，滤饼用甲基叔丁基醚洗涤，得到310mg产品，收率100％。 m/z:573.3(M+H)+。1HNMR(400Mz,DMSO):0.89(6H,m)、1.15-1.99(10H,m)、 2.11(1H,m)、2.31(2H,t)、3.21(2H,m)、3.53(2H,t)、4.32(1H,t)、4.51 (1H,m)、4.59(2H,br)、5.24(1H,br)、5.56(2H,br)、6.20(1H,br)、7.12(2H, s)、7.23(2H,d),7.58(2H,d)、7.94(1H,d),8.1 7(1H,d)、10.21(1H,br)。
实施例8.mc-vc-PAB-PNP的合成
在氮气保护下取mc-vc-PABOH 168.6mg(0.294mmol)溶于5ml无水吡啶中，反应体系冷却到0℃左右。另取PNP179mg(3eq)溶于5mlDCM中，再将其缓慢加入到反应体系中。并于0℃左右保持10min后除去冰浴，再于室温搅拌反应3h。反应完毕，加入70mlEA和100ml 15％柠檬酸水溶液，分取有机层。有机层依次用柠檬酸，水，饱和食盐水洗涤，再无水硫酸钠干燥，过滤，滤液减压浓缩至干得到浅黄色油状物，加入甲基叔丁基醚析晶得到类白色固体86mg,收率40％。m/z:738(M+H)+。 1HNMR(400Mz,CDCl3/CD3OD):0.84(6H,m)、1.11-1.84(10H,m)、2.05(1H,m)、 2.15(2H,t)、3.09(2H,m)、3.32(2H,t)、4.12(1H,m)、4.38(1H,m)、5.15 (2H,s)、6.61(2H,s)、6.84(1H,d),7.61(1H,d)、7.21(2H,d),7.50(2H,d)、 7.61(2H,d),8.18(2H,d)、9.59(1H,br)。
实施例9.mc-vc-PAB-MMAE的合成
于2mlDMF中加入20mg mc-vc-PAB-PNP(1.5eq)和3mgHOBT。室温搅拌片刻后，加入13mgMMAE，0.5ml吡啶，25ulDIEA。反应液于室温下搅拌反应2d。反应完毕后，反应液直接用制备柱纯化，收集所需成分浓缩后冻干，得到约10mg产品，收率约 42％。m/z:1317.1(M+H)+。
实施例10.mc-vc-PAB-MMAF的合成
按照实施例9的操作，得到mc-vc-PAB-MMAF约12.5mg，收率45.2％，m/z: 1345.7(M+H)+
实施例11mc-vc-PAB-PBD的合成
按照实施例9的操作，得到mc-vc-PAB-PBD约9.5mg，收率32.5％，m/z:1325.4 (M+H)+
实施例12mc-vc-PAB-DOX的合成
按照实施例9的操作，得到mc-vc-PAB-DOX约11.2mg，收率38.9％，m/z:1143.2 (M+H)+
实施例13mc-vc-PAB-SN-38的合成
将100mg购买的10-O-Boc-SN-38用10ml干燥的二氯甲烷溶解后，加入25.6mg(1eq)DMAP，于0℃下滴加三光气的二氯甲烷溶液(62mg三光气用2ml二氯甲烷溶解)，滴毕，继续于0℃下反应12h，减压除去二氯甲烷，用10ml干燥的DMF溶解后，加入144mg mc-vc-PABOH，转至室温搅拌24h，经过制备液相分离得到mc-vc-PAB-SN-38 41mg，两步收率总的为19.7％，m/z:1063.2(M+H)+
实施例14、2A1-HC-Cys254ins抗体的表达与纯化
使用FreestyleTM293-F(Invitrogen)悬浮细胞表达2A1-HC-Cys254ins抗体。转染前一天，以6×105个/mL密度将细胞接种于含300mL F17完全培养基 (FreestyleTM F17表达培养基，Gibco公司)的1L摇瓶中，37℃，5％CO2，120rpm 细胞培养摇床过夜培养。次日，用PEI进行抗体表达质粒的转染，其中质粒:PEI比例为2:1。转染后一天，按2.5％(v/v)加入TN1补料培养基，继续培养4天后离心收集上清。
收集得到的细胞表达上清，经Protein A亲和层析柱(Mabselect Sure LX，GE 公司)，以0.1M柠檬酸(pH3.0)洗脱，捕获的抗体用1M Tris-HCl(pH9.0)按1/10 (v/v)调节至pH7.0，再通过凝胶过滤层析柱SEC(Superdex 200，GE公司)去除多聚体和内毒素等杂质，同时将抗体缓冲液置换成PBS(pH7.4)，收集UV280nm目标峰样品经超滤离心管(30KD，Pall公司)浓缩至2mg/ml。
通过此方法获得的2A1-HC-Cys254ins抗体，浓度为2mg/ml，目标抗体单体(POI％)大于90％，用于后续试验。
实施例15、通过偶联2A1-HC-Cys357ins抗体和mc-vc-PAB-MMAE制备
2A1-HC-Cys357ins-mc-vc-PAB-MMAE TDC样品
细胞表达的2A1-HC-Cys357ins抗体，经过Mabselect Sure纯化，低pH洗脱后马上加入Tris溶液中和，并换液为pH7.5的Tris-HCl缓冲液。化合物 mc-vc-PAB-MMAE，白色粉末，将其溶解于DMA中备用。为了去除突变半胱氨酸残基上的屏蔽物，需要先将抗体还原。按照40倍分子比将1M的DTT水溶液加入 2A1-HC-Cys357ins抗体溶液中，混匀后20℃反应2小时。后将样品的pH调整至5.0，并通过SP Sepharose F.F.阳离子交换层析去除样品中的DTT和屏蔽物。随后按照 20倍分子比将DHAA溶液加入样品中，25℃避光反应4小时，使抗体链间二硫键重新连接。然后加入mc-vc-PAB-MMAE溶液，使得mc-vc-PAB-MMAE与抗体突变半胱氨酸进行偶联，充分混匀后25℃反应2小时。反应结束后使用SP Sepharose F.F.阳离子交换层析去除未偶联上抗体分子的mc-vc-PAB-MMAE,得到 2A1-HC-Cys357ins-mc-vc-PAB-MMAETDC样品。
实施例16、HIC-HPLC检测毒素比抗体比例DAR
用高效液相色谱疏水层析方法分析TDC样品，根据对应峰面积计算DAR。具体方法如下：
色谱柱：HICBu-NP5(5μm,4.6x 35mm)；
流动相：A:2M硫酸铵，0.025M、pH7的磷酸盐缓冲液；B：0.025M、pH7的磷酸盐
缓冲液；C：100％异丙醇；
缓冲液A平衡，缓冲液B与缓冲液C梯度洗脱，25℃，214nm检测。
附图1-3、9.HIC-HPLC分别检测2A1-HC-Cys357ins-mc-vc-PAB-MMAE， 2A1-HC-Cys378ins-mc-vc-PAB-MMAE,2A1-HC-Cys387ins-mc-vc-PAB-MMAE、 2A1-HC-Cys410ins-mc-vc-PAB-MMAE TDC DAR。
根据附图1-3、9计算得到定点偶联DAR在1.6-1.7之间，其化合物均一性很好。
附表1.2A1-LC-Cys110ins-mc-vc-PAB-MMAE TDC、 2A1-LC-Cys111ins-mc-vc-PAB-MMAE TDC、2A1-LC-Cys142ins-mc-vc-PAB-MMAE TDC 和2A1-HC-Cys254ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys255ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys258ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys259ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys354ins-mc-vc-PAB-MMAETDC、2A1-HC-Cys355ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys357ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys378ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys379ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys386ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys387ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys410ins-mc-vc-PAB-MMAE
附表1TDC的偶联效率DAR表
附表1显示，通过半胱氨酸插入突变改造进行定点偶联的TDC化合物偶联效率均较高(理论最高值为2.0)，DAR≥1.6。
实施例17、SEC-HPLC检测TDC抗体骨架稳定性情况以及TDC聚集情况
将TDC抗体骨架样品保存于37℃，第0、7、14、21天分别用SEC-HPLC分析其聚集情况，具体方法如下：
色谱柱：TSKgel SuperSW mAb HR(7.8mm×30cm)
流动相：0.1M硫酸钠、0.1M，pH6.7的磷酸盐缓冲液。
25℃，280nm检测。
附表2
附图10-13 2A1-HC-Cys378ins在第0、7、14、21天的SEC结果。数据显示样品在于37℃存放3周，非常稳定。
附表2.SEC-HPLC检测TDC抗体骨架2A1-HC-Cys357ins、2A1-HC-Cys387ins、 2A1-HC-Cys378ins、和2A1-HC-Cys410ins的聚集情况，样品于37℃存放3周，单体POI含量基本没有变化；
2A1-LC-Cys110ins-mc-vc-PAB-MMAE TDC、2A1-LC-Cys111ins-mc-vc-PAB-MMAETDC、 2A1-LC-Cys142ins-mc-vc-PAB-MMAE TDC和2A1-HC-Cys254ins-mc-vc-PAB-MMAETDC、 2A1-HC-Cys255ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys258ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys259ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys354ins-mc-vc-PAB-MMAE TDC、 2A1-HC-Cys355ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys357ins-mc-vc-PAB-MMAE TDC、 2A1-HC-Cys378ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys379ins-mc-vc-PAB-MMAE TDC、 2A1-HC-Cys386ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys387ins-mc-vc-PAB-MMAE TDC、 2A1-HC-Cys410ins-mc-vc-PAB-MMAE
附表3TDC目标单体含量列表
附表3显示，通过半胱氨酸定点偶联的TDC化合物目标单体含量在90％以上。
实施例18、经半胱氨酸插入突变改造后的骨架抗体与亲本抗体2A1对于EGFRvIII的亲和力
用间接ELISA法对比2A1-LC-Cys110ins-mc-vc-PAB-MMAE TDC、 2A1-LC-Cys111ins-mc-vc-PAB-MMAE TDC、2A1-LC-Cys142ins-mc-vc-PAB-MMAE TDC 和2A1-HC-Cys254ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys255ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys258ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys259ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys354ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys355ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys357ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys378ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys379ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys386ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys387ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys410ins-mc-vc-PAB-MMAE TDC及2A1对于EGFRvIII的相对亲和力。具体步骤如下：
重组EGFRvIII-His*6抗原包板；鱼皮明胶封闭；分别稀释各个插入突变体抗体，最高浓度10ug/ml，4倍梯度稀释，共11个浓度；HRP标记的二抗孵育；TMB显色，检测450nm处吸收。检测结果以A450对浓度作图，如图4-8和附表3所示，半胱氨酸插入突变后的抗体保持了与2A1相似的亲和力，EC50值很接近；说明2A1上轻链或重链插入突变不影响其与EGFRvIII抗原的亲和力。
附表4突变抗体的亲和力测定
附图4-8及附表4.2A1-LC-Cys110ins、2A1-LC-Cys111ins、2A1-LC-Cys142ins、2A1-HC-Cys254ins、2A1-HC-Cys255ins、2A1-HC-Cys258ins、2A1-HC-Cys259ins、2A1-HC-Cys354ins、2A1-HC-Cys355ins、2A1-HC-Cys357ins、2A1-HC-Cys378ins、 2A1-HC-Cys379ins、2A1-HC-Cys386ins、2A1-HC-Cys387ins、2A1-HC-Cys410ins抗体保持了2A1与抗原EGFRvIII的亲和力。
实施例19、细胞毒性药效检测
通过下列实验过程测定TDC细胞毒性活性：将TDC分别加入到EGFR过量表达或EGFRVIII表达的人肿瘤细胞培养基中，细胞培养72小时后测定细胞存活率。基于细胞的体外实验用于测定细胞存活率、细胞毒性和本发明TDC诱导的细胞程序性死亡。
通过细胞增殖试验测定抗体-毒素偶联物的体外药效。CellTiterAqueousOneSolution Cell Proliferation Assay为商购的(Promega Corp.，Madison,WI)。CellTiterAQueous One Solution Cell Proliferation Assay(a)是一种用比色法来检测细胞增殖和细胞毒性实验中的活细胞数量的检测试剂。此试剂含有一个新型的四唑化合物 [3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2- (4-sulfophenyl)-2H-tetrazolium,inner salt；MTS]和一种电子偶联剂 (phenazineethosulfate；PES)。PES具有增强的化学稳定性，这使它可与MTS混合形成稳定的溶液。这种方便的“单溶液”模式，是在第一代CellTiterAQueous Assay的基础上的改进，CellTiterAQueous Assay中使用的电子偶联剂PMS与 MTS溶液是分开提供的。MTS(Owen’s reagent)被细胞生物还原成为一种有色的甲臜产物，可直接溶解于培养基中。这种转化很可能是在代谢活跃的细胞中的脱氢酶产生的NADPH或NADH的作用下完成的。检测时，只需将少量的CellTiter AQueous One Solution Reagent直接加入培养板孔的培养基中，孵育1–4小时，然后以酶标仪读取490nm的吸光度值。
在490nm处检测到的甲臜产物的量与培养中的活细胞数成正比。由于MTS的甲臜产物在组织培养基中可溶，CellTiterAQueous One Solution Assay与MTT 或INT法相比操作步骤更少。
本发明中采用A431(EGFR过表达细胞)和U87-EGFRVIII(EGFRVIII突变体稳定细胞系)作为体外药效检测的研究体系。在96孔板中，进行细胞铺板6000/孔，24 小时后，进行抗体加药。对A431和U87-EGFRvIII的用药浓度为200nM-10pM，四倍稀释，对U87-EGFRVIII的用药浓度为500nM-30pM。处理72小时后MTS检测细胞活性。
附图14、15.2A1-HC-Cys357ins-mc-vc-PAB-MMAE， 2A1-HC-Cys378ins-mc-vc-PAB-MMAE,2A1-HC-Cys387ins-mc-vc-PAB-MMAE、 2A1-HC-Cys410ins-mc-vc-PAB-MMAE对EGFRwt过表达的人皮肤鳞癌细胞A431和 EFGRvIII过表达的人脑胶质瘤细胞株U87-EGFRvIII的IC50检测结果。
附表5.TDC对EGFRwt过表达细胞系A431及EGFRvIII表达稳定性株U87-EGFRVIII细胞毒性IC50检测结果
附表5结果显示2A1-LC-Cys110ins-mc-vc-PAB-MMAE TDC、 2A1-LC-Cys111ins-mc-vc-PAB-MMAE TDC、2A1-LC-Cys142ins-mc-vc-PAB-MMAE TDC 和2A1-HC-Cys254ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys255ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys258ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys259ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys354ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys355ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys357ins-mc-vc-PAB-MMAETDC、2A1-HC-Cys378ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys379ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys386ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys387ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys410ins-mc-vc-PAB-MMAE TDC对EGFRwt过表达细胞系A431及EGFRvIII表达稳定性株U87-EGFRVIII细胞毒性活性相当。
本发明并不限于由实施例中披露的具体实施方案的范围，这些实施例用来例示本发明的几个方面，在功能上等效的任意实施方案均属于本发明的范围。实际上，除本文所示和所述的以外，本发明的各种变型对本领域技术人员而言也是显而易见的并且属于本文所附权利要求的范围。
实施例20、血浆稳定性检测
取取一定量的TDC样品，加入到已去除人IgG的人血浆中，每种TDC重复三管，放置37℃水浴中孵育,分别孵育0h,24h、96h后，取出TDC样品，每管加入ProteinA (MabSelectSuReTM LX Lot:#10221479GE，用取PBS洗涤过的)100ul，垂直混合仪晃动吸附2h,经过洗涤洗脱步骤,获得孵育后的TDC。对孵育特定时间的TDC样品进行HIC-HPLC和RP-HPLC检测.判定样品的血浆稳定性。
附图16-19.2A1-HC-Cys357ins-mc-vc-PAB-MMAE TDC、 2A1-HC-Cys410ins-mc-vc-PAB-MMAE TDC、2A1-HC-Cys387ins-mc-vc-PAB-MMAE TDC 2A1-HC-Cys378ins-mc-vc-PAB-MMAE TDC HIC-HPLC血浆稳定性检测结果图示，三个分子均具有良好的血浆稳定性。
附表6.TDC血浆稳定性检测结果
实施例21、荷瘤小鼠药效检测
本发明建立了人胰腺癌细胞BxPC3裸小鼠皮下移植瘤模型，以评价 2A1-HC-Cys357ins-mc-vc-PAB-MMAE等TDC偶联药物的体内药效。以5×106A431 细胞通过皮下注射到4～6周鼠龄的BALB/c裸鼠背部，待小鼠肿瘤平均大小生长至 150～200mm3左右，随机分组，每组6只。在第1天，2A1-HC-Cys357ins-mc-vc-PAB-MMAE (2A1-HC-Cys357ins TDC)、2A1-HC-Cys410ins-mc-vc-PAB-MMAE(2A1-HC-Cys410ins TDC、2A1-HC-Cys387ins-mc-vc-PAB-MMAE(2A1-HC-Cys387insTDC)、 2A1-HC-Cys378ins-mc-vc-PAB-MMAE(2A1-HC-Cys378insTDC)以5mg/kg剂量进行单次尾静脉给药(附图21)数据显示为测量时肿瘤平均体积±SE。
附图21、2A1-HC-Cys357ins-mc-vc-PAB-MMAE(2A1-HC-Cys357ins TDC)、 2A1-HC-Cys410ins-mc-vc-PAB-MMAE(2A1-HC-Cys410ins TDC、 2A1-HC-Cys387ins-mc-vc-PAB-MMAE(2A1-HC-Cys387insTDC)、 2A1-HC-Cys378ins-mc-vc-PAB-MMAE(2A1-HC-Cys378insTDC)以5mg/kg剂量进行单次静脉给药,抑瘤效果显著。
附图说明
图1-3、9为实施例16的实验结果图；
图4-8为实施例18的实验结果图；
图10-13是实施例17的实验结果图；
图14-15是实施例19的实验结果图；
图16-19是实施例20的实验结果图；
图20是实施例21的实验结果图。
序列表
<110> 四川百利药业有限责任公司
<120> 半胱氨酸改造的抗体-毒素偶联物（tdc）定点偶联位点筛选
<160> 38
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<212> DNA
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gatgtgcagc ttcaggagtc gggacctagc ctggtgaaac cttctcagtc tctgtccctc 60
acctgcactg tcactggcta ctcaatcacc agtgattttg cctggaactg gattcggcag 120
tttccaggaa acaagctgga gtggatgggc tacataagtt atagtggtaa cactaggtac 180
aacccatctc tcaaaagtcg aatctctatc actcgcgaca catccaagaa ccaattcttc 240
ctgcagttga actctgtgac tattgaggac acagccacat attactgtgt aacggcggga 300
cgcgggtttc cttattgggg ccaagggact ctggtcactg tctctgca 348
<210> 2
<211> 125
<212> PRT
<213> 2A1重链可变区(VH氨基酸序列)
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Asp Val Gln Leu Gln Glu Ser Gly Pro Ser Leu Val Lys Pro Ser Gln
1 5 10 15
Ser Leu Ser Leu Thr Cys Thr Val Thr Gly Tyr Ser Ile Thr Ser Asp
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Phe Ala Trp Asn Trp Ile Arg Gln Phe Pro Gly Asn Lys Leu Glu Trp
35 40 45
Met Gly Tyr Ile Ser Tyr Ser Gly Asn Thr Arg Tyr Asn Pro Ser Leu
50 55 60
Lys Cys Asp Arg Cys Asp Arg Ser Arg Ile Ser Ile Thr Arg Asp Thr
65 70 75 80
Ser Lys Asn Gln Phe Phe Leu Gln Leu Asn Ser Val Thr Ile Glu Asp
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Thr Ala Thr Tyr Tyr Cys Val Thr Ala Gly Arg Gly Phe Pro Tyr Trp
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Gly Gln Gly Thr Leu Val Thr Val Ser Ala Cys Asp Arg
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<212> DNA
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gacatcctga tgacccaatc tccatcctcc atgtctgtat ctctgggaga cacagtcagc 60
atcacttgcc attcaagtca ggacattaac agtaatatag ggtggttgca gcagagacca 120
gggaaatcat ttaagggcct gatctatcat ggaaccaact tggacgatga agttccatca 180
aggttcagtg gcagtggatc tggagccgat tattctctca ccatcagcag cctggaatct 240
gaagattttg cagactatta ctgtgtacag tatgctcagt ttccgtggac gttcggtgga 300
ggcaccaagc tggaaatcaa acgt 324
<210> 7
<211> 117
<212> PRT
<213> 2A1轻链可变区(VL氨基酸序列)
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Asp Ile Leu Met Thr Gln Ser Pro Ser Ser Met Ser Val Ser Leu Gly
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Asp Thr Val Ser Ile Thr Cys His Ser Ser Gln Asp Ile Asn Ser Asn
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Ile Gly Trp Leu Gln Gln Arg Pro Gly Lys Ser Phe Lys Gly Leu Ile
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Tyr His Gly Thr Asn Leu Asp Asp Glu Val Pro Ser Arg Phe Ser Gly
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Ser Cys Asp Arg Cys Asp Arg Gly Ser Gly Ala Asp Tyr Ser Leu Thr
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Ile Ser Ser Leu Glu Ser Glu Asp Phe Ala Asp Tyr Tyr Cys Val Gln
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Tyr Ala Gln Phe Pro Trp Thr Phe Gly Gly Gly Thr Lys Leu Glu Ile
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Lys Arg Cys Asp Arg
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<210> 11
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<212> DNA
<213> 2A1重链恒定区(CHDNA序列)
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gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaact cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gaggtcacat gcgtggtggt ggacgtgagc cacgaagacc ctgaggtcaa gttcaactgg 480
tacgtggacg gcgtggaggt gcataatgcc aagacaaagc cgcgggagga gcagtacaac 540
agcacgtacc gtgtggtcag cgtcctcacc gtcctgcacc aggactggct gaatggcaag 600
gagtacaagt gcaaggtctc caacaaagcc ctcccagccc ccatcgagaa aaccatctcc 660
aaagccaaag ggcagccccg agaaccacag gtgtacaccc tgcccccatc ccgggatgag 720
ctgaccaaga accaggtcag cctgacctgc ctggtcaaag gcttctatcc cagcgacatc 780
gccgtggagt gggagagcaa tgggcagccg gagaacaact acaagaccac gcctcccgtg 840
ctggactccg acggctcctt cttcctctat agcaagctca ccgtggacaa gagcaggtgg 900
cagcagggga acgtcttctc atgctccgtg atgcatgagg ctctgcacaa ccactacacg 960
cagaagagcc tctccctgtc tccgggtaaa 990
<210> 12
<211> 330
<212> PRT
<213> 2A1重链恒定区(CH氨基酸序列)
<400> 12
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
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Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
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Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
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Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
130 135 140
Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp
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Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu
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Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu
180 185 190
His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
195 200 205
Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly
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Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp Glu
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Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr
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Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn
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Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe
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Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn
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Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr Thr
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Gln Lys Ser Leu Ser Leu Ser Pro Gly Lys
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<210> 13
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<212> DNA
<213> 2A1轻链恒定区(CLDNA序列)
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acggtggctg caccatctgt cttcatcttc ccgccatctg atgagcagtt gaaatctgga 60
actgcctctg ttgtgtgcct gctgaataac ttctatccca gagaggccaa agtacagtgg 120
aaggtggata acgccctcca atcgggtaac tcccaggaga gtgtcacaga gcaggacagc 180
aaggacagca cctacagcct cagcagcacc ctgacgctga gcaaagcaga ctacgagaaa 240
cacaaagtct acgcctgcga agtcacccat cagggcctga gctcgcccgt cacaaagagc 300
ttcaacaggg gagagtgtta g 321
<210> 14
<211> 106
<212> PRT
<213> 2A1轻链恒定区(CL氨基酸序列)
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Thr Val Ala Ala Pro Ser Val Phe Ile Phe Pro Pro Ser Asp Glu Gln
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Pro Arg Glu Ala Lys Val Gln Trp Lys Val Asp Asn Ala Leu Gln Ser
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Gly Asn Ser Gln Glu Ser Val Thr Glu Gln Asp Ser Lys Asp Ser Thr
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Tyr Ser Leu Ser Ser Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu Lys
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His Lys Val Tyr Ala Cys Glu Val Thr His Gln Gly Leu Ser Ser Pro
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Val Thr Lys Ser Phe Asn Arg Gly Glu Cys
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<210> 15
<211> 336
<212> DNA
<213> 2A1-LC-Cys110ins轻链恒定区(CLDNA序列)
<400> 15
gaaatcaaac gtacgtgtgt ggctgcacca tctgtcttca tcttcccgcc atctgatgag 60
cagttgaaat ctggaactgc ctctgttgtg tgcctgctga ataacttcta tcccagagag 120
gccaaagtac agtggaaggt ggataacgcc ctccaatcgg gtaactccca ggagagtgtc 180
acagagcagg acagcaagga cagcacctac agcctcagca gcaccctgac gctgagcaaa 240
gcagactacg agaaacacaa agtctacgcc tgcgaagtca cccatcaggg cctgagctcg 300
cccgtcacaa agagcttcaa caggggagag tgttag 336
<210> 16
<211> 111
<212> PRT
<213> 2A1-LC-Cys110ins轻链恒定区(CL氨基酸序列)
<400> 16
Glu Ile Lys Arg Thr Cys Val Ala Ala Pro Ser Val Phe Ile Phe Pro
1 5 10 15
Pro Ser Asp Glu Gln Leu Lys Ser Gly Thr Ala Ser Val Val Cys Leu
20 25 30
Leu Asn Asn Phe Tyr Pro Arg Glu Ala Lys Val Gln Trp Lys Val Asp
35 40 45
Asn Ala Leu Gln Ser Gly Asn Ser Gln Glu Ser Val Thr Glu Gln Asp
50 55 60
Ser Lys Asp Ser Thr Tyr Ser Leu Ser Ser Thr Leu Thr Leu Ser Lys
65 70 75 80
Ala Asp Tyr Glu Lys His Lys Val Tyr Ala Cys Glu Val Thr His Gln
85 90 95
Gly Leu Ser Ser Pro Val Thr Lys Ser Phe Asn Arg Gly Glu Cys
100 105 110
<210> 17
<211> 336
<212> DNA
<213> 2A1-LC-Cys111ins轻链恒定区(CLDNA序列)
<400> 17
gaaatcaaac gtacggtgtg tgctgcacca tctgtcttca tcttcccgcc atctgatgag 60
cagttgaaat ctggaactgc ctctgttgtg tgcctgctga ataacttcta tcccagagag 120
gccaaagtac agtggaaggt ggataacgcc ctccaatcgg gtaactccca ggagagtgtc 180
acagagcagg acagcaagga cagcacctac agcctcagca gcaccctgac gctgagcaaa 240
gcagactacg agaaacacaa agtctacgcc tgcgaagtca cccatcaggg cctgagctcg 300
cccgtcacaa agagcttcaa caggggagag tgttag 336
<210> 18
<211> 111
<212> PRT
<213> 2A1-LC-Cys111ins轻链恒定区(CL氨基酸序列)
<400> 18
Glu Ile Lys Arg Thr Val Cys Ala Ala Pro Ser Val Phe Ile Phe Pro
1 5 10 15
Pro Ser Asp Glu Gln Leu Lys Ser Gly Thr Ala Ser Val Val Cys Leu
20 25 30
Leu Asn Asn Phe Tyr Pro Arg Glu Ala Lys Val Gln Trp Lys Val Asp
35 40 45
Asn Ala Leu Gln Ser Gly Asn Ser Gln Glu Ser Val Thr Glu Gln Asp
50 55 60
Ser Lys Asp Ser Thr Tyr Ser Leu Ser Ser Thr Leu Thr Leu Ser Lys
65 70 75 80
Ala Asp Tyr Glu Lys His Lys Val Tyr Ala Cys Glu Val Thr His Gln
85 90 95
Gly Leu Ser Ser Pro Val Thr Lys Ser Phe Asn Arg Gly Glu Cys
100 105 110
<210> 19
<211> 336
<212> DNA
<213> 2A1-LC-Cys142ins轻链恒定区(CLDNA序列)
<400> 19
gaaatcaaac gtacggtggc tgcaccatct gtcttcatct tcccgccatc tgatgagcag 60
ttgaaatctg gaactgcctc tgttgtgtgc ctgctgaata acttctatcc ctgtagagag 120
gccaaagtac agtggaaggt ggataacgcc ctccaatcgg gtaactccca ggagagtgtc 180
acagagcagg acagcaagga cagcacctac agcctcagca gcaccctgac gctgagcaaa 240
gcagactacg agaaacacaa agtctacgcc tgcgaagtca cccatcaggg cctgagctcg 300
cccgtcacaa agagcttcaa caggggagag tgttag 336
<210> 20
<211> 111
<212> PRT
<213> 2A1-LC-Cys142ins轻链恒定区(CL氨基酸序列)
<400> 20
Glu Ile Lys Arg Thr Val Ala Ala Pro Ser Val Phe Ile Phe Pro Pro
1 5 10 15
Ser Asp Glu Gln Leu Lys Ser Gly Thr Ala Ser Val Val Cys Leu Leu
20 25 30
Asn Asn Phe Tyr Pro Cys Arg Glu Ala Lys Val Gln Trp Lys Val Asp
35 40 45
Asn Ala Leu Gln Ser Gly Asn Ser Gln Glu Ser Val Thr Glu Gln Asp
50 55 60
Ser Lys Asp Ser Thr Tyr Ser Leu Ser Ser Thr Leu Thr Leu Ser Lys
65 70 75 80
Ala Asp Tyr Glu Lys His Lys Val Tyr Ala Cys Glu Val Thr His Gln
85 90 95
Gly Leu Ser Ser Pro Val Thr Lys Ser Phe Asn Arg Gly Glu Cys
100 105 110
<210> 21
<211> 993
<212> DNA
<213> 2A1-HC-Cys254ins重链恒定区(CHDNA序列)
<400> 21
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
tgtgaggtca catgcgtggt ggtggacgtg agccacgaag accctgaggt caagttcaac 480
tggtacgtgg acggcgtgga ggtgcataat gccaagacaa agccgcggga ggagcagtac 540
aacagcacgt accgtgtggt cagcgtcctc accgtcctgc accaggactg gctgaatggc 600
aaggagtaca agtgcaaggt ctccaacaaa gccctcccag cccccatcga gaaaaccatc 660
tccaaagcca aagggcagcc ccgagaacca caggtgtaca ccctgccccc atcccgggat 720
gagctgacca agaaccaggt cagcctgacc tgcctggtca aaggcttcta tcccagcgac 780
atcgccgtgg agtgggagag caatgggcag ccggagaaca actacaagac cacgcctccc 840
gtgctggact ccgacggctc cttcttcctc tatagcaagc tcaccgtgga caagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 22
<211> 330
<212> PRT
<213> 2A1-HC-Cys254ins重链恒定区(CH氨基酸序列)
<400> 22
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Cys Glu Val Thr
130 135 140
Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn
145 150 155 160
Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg
165 170 175
Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val
180 185 190
Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser
195 200 205
Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys
210 215 220
Gly Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp
225 230 235 240
Glu Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe
245 250 255
Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu
260 265 270
Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe
275 280 285
Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330
<210> 23
<211> 993
<212> DNA
<213> 2A1-HC-Cys255ins重链恒定区(CHDNA序列)
<400> 23
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gagtgtgtca catgcgtggt ggtggacgtg agccacgaag accctgaggt caagttcaac 480
tggtacgtgg acggcgtgga ggtgcataat gccaagacaa agccgcggga ggagcagtac 540
aacagcacgt accgtgtggt cagcgtcctc accgtcctgc accaggactg gctgaatggc 600
aaggagtaca agtgcaaggt ctccaacaaa gccctcccag cccccatcga gaaaaccatc 660
tccaaagcca aagggcagcc ccgagaacca caggtgtaca ccctgccccc atcccgggat 720
gagctgacca agaaccaggt cagcctgacc tgcctggtca aaggcttcta tcccagcgac 780
atcgccgtgg agtgggagag caatgggcag ccggagaaca actacaagac cacgcctccc 840
gtgctggact ccgacggctc cttcttcctc tatagcaagc tcaccgtgga caagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 24
<211> 330
<212> PRT
<213> 2A1-HC-Cys255ins重链恒定区(CH氨基酸序列)
<400> 24
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Cys Val Thr
130 135 140
Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn
145 150 155 160
Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg
165 170 175
Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val
180 185 190
Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser
195 200 205
Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys
210 215 220
Gly Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp
225 230 235 240
Glu Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe
245 250 255
Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu
260 265 270
Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe
275 280 285
Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330
<210> 25
<211> 993
<212> DNA
<213> 2A1-HC-Cys258ins重链恒定区(CHDNA序列)
<400> 25
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gaggtcacat gctgtgtggt ggtggacgtg agccacgaag accctgaggt caagttcaac 480
tggtacgtgg acggcgtgga ggtgcataat gccaagacaa agccgcggga ggagcagtac 540
aacagcacgt accgtgtggt cagcgtcctc accgtcctgc accaggactg gctgaatggc 600
aaggagtaca agtgcaaggt ctccaacaaa gccctcccag cccccatcga gaaaaccatc 660
tccaaagcca aagggcagcc ccgagaacca caggtgtaca ccctgccccc atcccgggat 720
gagctgacca agaaccaggt cagcctgacc tgcctggtca aaggcttcta tcccagcgac 780
atcgccgtgg agtgggagag caatgggcag ccggagaaca actacaagac cacgcctccc 840
gtgctggact ccgacggctc cttcttcctc tatagcaagc tcaccgtgga caagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 26
<211> 330
<212> PRT
<213> 2A1-HC-Cys258ins重链恒定区(CH氨基酸序列)
<400> 26
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
130 135 140
Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn
145 150 155 160
Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg
165 170 175
Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val
180 185 190
Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser
195 200 205
Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys
210 215 220
Gly Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp
225 230 235 240
Glu Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe
245 250 255
Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu
260 265 270
Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe
275 280 285
Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330
<210> 27
<211> 993
<212> DNA
<213> 2A1-HC-Cys259ins重链恒定区(CHDNA序列)
<400> 27
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gaggtcacat gcgtgtgtgt ggtggacgtg agccacgaag accctgaggt caagttcaac 480
tggtacgtgg acggcgtgga ggtgcataat gccaagacaa agccgcggga ggagcagtac 540
aacagcacgt accgtgtggt cagcgtcctc accgtcctgc accaggactg gctgaatggc 600
aaggagtaca agtgcaaggt ctccaacaaa gccctcccag cccccatcga gaaaaccatc 660
tccaaagcca aagggcagcc ccgagaacca caggtgtaca ccctgccccc atcccgggat 720
gagctgacca agaaccaggt cagcctgacc tgcctggtca aaggcttcta tcccagcgac 780
atcgccgtgg agtgggagag caatgggcag ccggagaaca actacaagac cacgcctccc 840
gtgctggact ccgacggctc cttcttcctc tatagcaagc tcaccgtgga caagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 28
<211> 330
<212> PRT
<213> 2A1-HC-Cys259ins重链恒定区(CH氨基酸序列)
<400> 28
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
130 135 140
Val Cys Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn
145 150 155 160
Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg
165 170 175
Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val
180 185 190
Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser
195 200 205
Asn Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys
210 215 220
Gly Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp
225 230 235 240
Glu Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe
245 250 255
Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu
260 265 270
Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe
275 280 285
Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330
<210> 29
<211> 993
<212> DNA
<213> 2A1-HC-Cys354ins重链恒定区(CHDNA序列)
<400> 29
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gaggtcacat gcgtggtggt ggacgtgagc cacgaagacc ctgaggtcaa gttcaactgg 480
tacgtggacg gcgtggaggt gcataatgcc aagacaaagc cgcgggagga gcagtacaac 540
agcacgtacc gtgtggtcag cgtcctcacc gtcctgcacc aggactggct gaatggcaag 600
gagtacaagt gcaaggtctc caacaaagcc ctcccagccc ccatcgagaa aaccatctcc 660
aaagccaaag ggcagccccg agaaccacag gtgtacaccc tgcccccatc ccgggatgag 720
tgtctgacca agaaccaggt cagcctgacc tgcctggtca aaggcttcta tcccagcgac 780
atcgccgtgg agtgggagag caatgggcag ccggagaaca actacaagac cacgcctccc 840
gtgctggact ccgacggctc cttcttcctc tatagcaagc tcaccgtgga caagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 30
<211> 330
<212> PRT
<213> 2A1-HC-Cys354ins重链恒定区(CH氨基酸序列)
<400> 30
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
130 135 140
Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp
145 150 155 160
Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu
165 170 175
Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu
180 185 190
His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
195 200 205
Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly
210 215 220
Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp Glu
225 230 235 240
Cys Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe
245 250 255
Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu
260 265 270
Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe
275 280 285
Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330
<210> 31
<211> 993
<212> DNA
<213> 2A1-HC-Cys355ins重链恒定区(CHDNA序列)
<400> 31
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gaggtcacat gcgtggtggt ggacgtgagc cacgaagacc ctgaggtcaa gttcaactgg 480
tacgtggacg gcgtggaggt gcataatgcc aagacaaagc cgcgggagga gcagtacaac 540
agcacgtacc gtgtggtcag cgtcctcacc gtcctgcacc aggactggct gaatggcaag 600
gagtacaagt gcaaggtctc caacaaagcc ctcccagccc ccatcgagaa aaccatctcc 660
aaagccaaag ggcagccccg agaaccacag gtgtacaccc tgcccccatc ccgggatgag 720
ctgtgtacca agaaccaggt cagcctgacc tgcctggtca aaggcttcta tcccagcgac 780
atcgccgtgg agtgggagag caatgggcag ccggagaaca actacaagac cacgcctccc 840
gtgctggact ccgacggctc cttcttcctc tatagcaagc tcaccgtgga caagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 32
<211> 330
<212> PRT
<213> 2A1-HC-Cys355ins重链恒定区(CH氨基酸序列)
<400> 32
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
130 135 140
Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp
145 150 155 160
Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu
165 170 175
Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu
180 185 190
His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
195 200 205
Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly
210 215 220
Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp Glu
225 230 235 240
Leu Cys Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe
245 250 255
Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu
260 265 270
Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe
275 280 285
Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330
<210> 33
<211> 993
<212> DNA
<213> 2A1-HC-Cys357ins重链恒定区(CHDNA序列)
<400> 33
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gaggtcacat gcgtggtggt ggacgtgagc cacgaagacc ctgaggtcaa gttcaactgg 480
tacgtggacg gcgtggaggt gcataatgcc aagacaaagc cgcgggagga gcagtacaac 540
agcacgtacc gtgtggtcag cgtcctcacc gtcctgcacc aggactggct gaatggcaag 600
gagtacaagt gcaaggtctc caacaaagcc ctcccagccc ccatcgagaa aaccatctcc 660
aaagccaaag ggcagccccg agaaccacag gtgtacaccc tgcccccatc ccgggatgag 720
ctgaccaagt gtaaccaggt cagcctgacc tgcctggtca aaggcttcta tcccagcgac 780
atcgccgtgg agtgggagag caatgggcag ccggagaaca actacaagac cacgcctccc 840
gtgctggact ccgacggctc cttcttcctc tatagcaagc tcaccgtgga caagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 34
<211> 330
<212> PRT
<213> 2A1-HC-Cys357ins重链恒定区(CH氨基酸序列)
<400> 34
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
130 135 140
Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp
145 150 155 160
Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu
165 170 175
Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu
180 185 190
His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
195 200 205
Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly
210 215 220
Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp Glu
225 230 235 240
Leu Thr Lys Cys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe
245 250 255
Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu
260 265 270
Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe
275 280 285
Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330
<210> 35
<211> 993
<212> DNA
<213> 2A1-HC-Cys378ins重链恒定区(CHDNA序列)
<400> 35
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gaggtcacat gcgtggtggt ggacgtgagc cacgaagacc ctgaggtcaa gttcaactgg 480
tacgtggacg gcgtggaggt gcataatgcc aagacaaagc cgcgggagga gcagtacaac 540
agcacgtacc gtgtggtcag cgtcctcacc gtcctgcacc aggactggct gaatggcaag 600
gagtacaagt gcaaggtctc caacaaagcc ctcccagccc ccatcgagaa aaccatctcc 660
aaagccaaag ggcagccccg agaaccacag gtgtacaccc tgcccccatc ccgggatgag 720
ctgaccaaga accaggtcag cctgacctgc ctggtcaaag gcttctatcc cagcgacatc 780
gccgtggagt ggtgtgagag caatgggcag ccggagaaca actacaagac cacgcctccc 840
gtgctggact ccgacggctc cttcttcctc tatagcaagc tcaccgtgga caagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 36
<211> 330
<212> PRT
<213> 2A1-HC-Cys378ins重链恒定区(CH氨基酸序列)
<400> 36
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
130 135 140
Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp
145 150 155 160
Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu
165 170 175
Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu
180 185 190
His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
195 200 205
Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly
210 215 220
Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp Glu
225 230 235 240
Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr
245 250 255
Pro Ser Asp Ile Ala Val Glu Trp Cys Glu Ser Asn Gly Gln Pro Glu
260 265 270
Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe
275 280 285
Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330
<210> 37
<211> 993
<212> DNA
<213> 2A1-HC-Cys379ins重链恒定区(CHDNA序列)
<400> 37
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gaggtcacat gcgtggtggt ggacgtgagc cacgaagacc ctgaggtcaa gttcaactgg 480
tacgtggacg gcgtggaggt gcataatgcc aagacaaagc cgcgggagga gcagtacaac 540
agcacgtacc gtgtggtcag cgtcctcacc gtcctgcacc aggactggct gaatggcaag 600
gagtacaagt gcaaggtctc caacaaagcc ctcccagccc ccatcgagaa aaccatctcc 660
aaagccaaag ggcagccccg agaaccacag gtgtacaccc tgcccccatc ccgggatgag 720
ctgaccaaga accaggtcag cctgacctgc ctggtcaaag gcttctatcc cagcgacatc 780
gccgtggagt gggagtgtag caatgggcag ccggagaaca actacaagac cacgcctccc 840
gtgctggact ccgacggctc cttcttcctc tatagcaagc tcaccgtgga caagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 38
<211> 330
<212> PRT
<213> 2A1-HC-Cys379ins重链恒定区(CH氨基酸序列)
<400> 38
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
130 135 140
Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp
145 150 155 160
Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu
165 170 175
Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu
180 185 190
His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
195 200 205
Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly
210 215 220
Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp Glu
225 230 235 240
Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr
245 250 255
Pro Ser Asp Ile Ala Val Glu Trp Glu Cys Ser Asn Gly Gln Pro Glu
260 265 270
Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe
275 280 285
Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330
<210> 39
<211> 993
<212> DNA
<213> 2A1-HC-Cys386ins重链恒定区(CHDNA序列)
<400> 39
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gaggtcacat gcgtggtggt ggacgtgagc cacgaagacc ctgaggtcaa gttcaactgg 480
tacgtggacg gcgtggaggt gcataatgcc aagacaaagc cgcgggagga gcagtacaac 540
agcacgtacc gtgtggtcag cgtcctcacc gtcctgcacc aggactggct gaatggcaag 600
gagtacaagt gcaaggtctc caacaaagcc ctcccagccc ccatcgagaa aaccatctcc 660
aaagccaaag ggcagccccg agaaccacag gtgtacaccc tgcccccatc ccgggatgag 720
ctgaccaaga accaggtcag cctgacctgc ctggtcaaag gcttctatcc cagcgacatc 780
gccgtggagt gggagagcaa tgggcagccg gagaactgta actacaagac cacgcctccc 840
gtgctggact ccgacggctc cttcttcctc tatagcaagc tcaccgtgga caagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 40
<211> 330
<212> PRT
<213> 2A1-HC-Cys386ins重链恒定区(CH氨基酸序列)
<400> 40
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
130 135 140
Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp
145 150 155 160
Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu
165 170 175
Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu
180 185 190
His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
195 200 205
Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly
210 215 220
Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp Glu
225 230 235 240
Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr
245 250 255
Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn
260 265 270
Cys Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe
275 280 285
Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330
<210> 41
<211> 993
<212> DNA
<213> 2A1-HC-Cys387ins重链恒定区(CHDNA序列)
<400> 41
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gaggtcacat gcgtggtggt ggacgtgagc cacgaagacc ctgaggtcaa gttcaactgg 480
tacgtggacg gcgtggaggt gcataatgcc aagacaaagc cgcgggagga gcagtacaac 540
agcacgtacc gtgtggtcag cgtcctcacc gtcctgcacc aggactggct gaatggcaag 600
gagtacaagt gcaaggtctc caacaaagcc ctcccagccc ccatcgagaa aaccatctcc 660
aaagccaaag ggcagccccg agaaccacag gtgtacaccc tgcccccatc ccgggatgag 720
ctgaccaaga accaggtcag cctgacctgc ctggtcaaag gcttctatcc cagcgacatc 780
gccgtggagt gggagagcaa tgggcagccg gagaacaact gttacaagac cacgcctccc 840
gtgctggact ccgacggctc cttcttcctc tatagcaagc tcaccgtgga caagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 42
<211> 330
<212> PRT
<213> 2A1-HC-Cys387ins重链恒定区(CH氨基酸序列)
<400> 42
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
130 135 140
Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp
145 150 155 160
Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu
165 170 175
Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu
180 185 190
His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
195 200 205
Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly
210 215 220
Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp Glu
225 230 235 240
Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr
245 250 255
Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn
260 265 270
Asn Cys Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe
275 280 285
Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330
<210> 43
<211> 993
<212> DNA
<213> 2A1-HC-Cys410ins重链恒定区(CHDNA序列)
<400> 43
gctagcacca agggcccatc ggtcttcccc ctggcaccct cctccaagag cacctctggg 60
ggcacagcgg ccctgggctg cctggtcaag gactacttcc ccgaaccggt gacggtgtcg 120
tggaactcag gcgccctgac cagcggcgtg cacaccttcc cggctgtcct acagtcctca 180
ggactctact ccctcagcag cgtggtgacc gtgccctcca gcagcttggg cacccagacc 240
tacatctgca acgtgaatca caagcccagc aacaccaagg tggacaagag agttgagccc 300
aaatcttgtg acaaaactca cacatgccca ccgtgcccag cacctgaatt cctgggggga 360
ccgtcagtct tcctcttccc cccaaaaccc aaggacaccc tcatgatctc ccggacccct 420
gaggtcacat gcgtggtggt ggacgtgagc cacgaagacc ctgaggtcaa gttcaactgg 480
tacgtggacg gcgtggaggt gcataatgcc aagacaaagc cgcgggagga gcagtacaac 540
agcacgtacc gtgtggtcag cgtcctcacc gtcctgcacc aggactggct gaatggcaag 600
gagtacaagt gcaaggtctc caacaaagcc ctcccagccc ccatcgagaa aaccatctcc 660
aaagccaaag ggcagccccg agaaccacag gtgtacaccc tgcccccatc ccgggatgag 720
ctgaccaaga accaggtcag cctgacctgc ctggtcaaag gcttctatcc cagcgacatc 780
gccgtggagt gggagagcaa tgggcagccg gagaacaact acaagaccac gcctcccgtg 840
ctggactccg acggctcctt cttcctctat agcaagctca ccgtggactg taagagcagg 900
tggcagcagg ggaacgtctt ctcatgctcc gtgatgcatg aggctctgca caaccactac 960
acgcagaaga gcctctccct gtctccgggt taa 993
<210> 44
<211> 330
<212> PRT
<213> 2A1-HC-Cys410ins重链恒定区(CH氨基酸序列)
<400> 44
Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Ser Ser Lys
1 5 10 15
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr
20 25 30
Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr Ser
35 40 45
Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly Leu Tyr Ser
50 55 60
Leu Ser Ser Val Val Thr Val Pro Ser Ser Ser Leu Gly Thr Gln Thr
65 70 75 80
Tyr Ile Cys Asn Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys
85 90 95
Arg Val Glu Pro Lys Ser Cys Asp Lys Thr His Thr Cys Pro Pro Cys
100 105 110
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro
115 120 125
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
130 135 140
Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp
145 150 155 160
Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu
165 170 175
Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu
180 185 190
His Gln Asp Trp Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
195 200 205
Lys Ala Leu Pro Ala Pro Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly
210 215 220
Gln Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp Glu
225 230 235 240
Leu Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr
245 250 255
Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn
260 265 270
Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe
275 280 285
Leu Tyr Ser Lys Leu Thr Val Asp Cys Lys Ser Arg Trp Gln Gln Gly
290 295 300
Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu His Asn His Tyr
305 310 315 320
Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
325 330

Claims (10)

1.一种半胱氨酸改造的抗体-毒素偶联物，其特征在于：抗体为半胱氨酸定点插入抗体，半胱氨酸插入位点包含选自以下位点的一个或多个：kappa/λ轻链恒定区轻链第110位、第111位、第142位，IgG抗体重链恒定区重链第254位、第255位、第258位、第259位、第354位、第355位、第357位、第378位、第379位、第386位、第387位或第410位。
2.根据权利要求1所述的一种半胱氨酸改造的抗体-毒素偶联物，其特征在于：所述半胱氨酸插入位点的氨基酸序列包含以下序列的一个或多个：
LC-110ins：EIKRTCVAAPS；
LC-111ins：IKRTVCAAPSV；
LC-142ins：NNFYPCREAKV；
HC-254ins：ISRTPCEVTCV；
HC-255ins：SRTPECVTCVV；
HC-258ins：PEVTCCVVVDV；
HC-259ins：EVTCVCVVDVS；
HC-354ins：PSRDECLTKNQ；
HC-355ins：SRDELCTKNQV；
HC-357ins：DELTKCNQVSL；
HC-378ins：IAVEWCESNGQ；
HC-379ins：AVEWECSNGQP；
HC-386ins：GQPENCNYKTT；
HC-387ins：QPENNCYKTTP；
HC-410ins：KLTVDCKSRWQ。
3.根据权利要求1所述的一种半胱氨酸改造的抗体-毒素偶联物，其特征在于：所述插入的半胱氨酸游离巯基(-SH)通过连接子与高活性细胞毒素进行定点偶联；连接子与插入的半胱氨酸偶联的抗体轻链氨基酸序列为：EIKRTCVAAPS、IKRTVCAAPSV和NNFYPCREAKV；连接子与插入的半胱氨酸偶联的抗体重链氨基酸序列为：ISRTPCEVTCV、SRTPECVTCVV、PEVTCCVVVDV、EVTCVCVVDVS、PSRDECLTKNQ、SRDELCTKNQV、DELTKCNQVSL、IAVEWCESNGQ、AVEWECSNGQP、GQPENCNYKTT、QPENNCYKTTP、KLTVDCKSRWQ；其中，C为目标抗体轻链或重链插入的半胱氨酸。
4.根据权利要求1所述的一种半胱氨酸改造的抗体-毒素偶联物，其特征在于：所述抗体轻链包括kappa或λ同种型。
5.根据权利要求1所述的一种半胱氨酸改造的抗体-毒素偶联物，其特征在于：所述抗体重链包括IgG1、IgG2、IgG3或IgG4同种型。
6.根据权利要求1所述的一种半胱氨酸改造的抗体-毒素偶联物，其特征在于：所述半胱氨酸包含巯基。
7.根据权利要求6所述的一种半胱氨酸改造的抗体-毒素偶联物，其特征在于：所述巯基能够进行化学偶联。
8.根据权利要求3所述的一种半胱氨酸改造的抗体-毒素偶联物，其特征在于：所述高活性细胞毒素选自：MMAE、MMAF、PBD、SN-38、Dox或Amanitin及其类似物，分子式如下为：
9.根据权利要求1所述的一种半胱氨酸改造的抗体-毒素偶联物，其特征在于：所述毒素与抗体比例为1.6-2.0或3.2-4.0。
10.根据权利要求1所述的一种半胱氨酸改造的抗体-毒素偶联物，其特征在于：所述定点偶联步骤为：首先使用还原剂还原抗体，解除抗体上改造的半胱氨酸残基上的屏蔽，并通过阳离子交换层析或超滤换液等方式去除DTT与屏蔽物。然后使用氧化剂氧化抗体，使抗体的链间二硫键重新连接。最后加入payload与抗体改造的半胱氨酸残基上的游离巯基偶联，并通过阳离子交换层析或超滤换液等方式去除未偶联上抗体分子的payload。
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