首页> 美国卫生研究院文献>Elsevier Sponsored Documents >A monoclonal antibody raised against a thermo-stabilised β1-adrenoceptor interacts with extracellular loop 2 and acts as a negative allosteric modulator of a sub-set of β1-adrenoceptors expressed in stable cell lines
【2h】

A monoclonal antibody raised against a thermo-stabilised β1-adrenoceptor interacts with extracellular loop 2 and acts as a negative allosteric modulator of a sub-set of β1-adrenoceptors expressed in stable cell lines

机译:产生针对热稳定的β1-肾上腺素能受体的单克隆抗体与细胞外环2相互作用并充当稳定细胞系中表达的β1-肾上腺素能受体亚组的负变构调节剂。

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

class="kwd-title">Chemical compounds studied in this article: Alprenolol (Pubchem CID: 2119), CGP 12177 (Pubchem CID: 2687), CGP 20712A (Pubchem CID: 2685), Cimaterol (Pubchem CID: 2755), Furimazine (Pubchem CID: 219083), Hoechst 33342 (Pubchem CID: 1464), IBMX (Pubchem CID: 3758), ICI 118551 (Pubchem CID: 5484725), Isoprenaline (Pubchem CID: 5807), Propranolol (Pubchem CID: 4946) class="kwd-title">Abbreviations: ATCM, allosteric ternary complex model; CHO, Chinese hamster ovary; CRE, cAMP response element; ECL, extracellular loop; HEK, human embryonic kidney; mAb, monoclonal antibody; SPAP, secreted placental alkaline phosphatase; StaR, stabilised receptor class="kwd-title">Keywords: GPCR, Allosterism, Monoclonal antibody, Extracellular loop 2 class="head no_bottom_margin" id="ab010title">AbstractRecent interest has focused on antibodies that can discriminate between different receptor conformations. Here we have characterised the effect of a monoclonal antibody (mAb3), raised against a purified thermo-stabilised turkey β1-adrenoceptor (β1AR-m23 StaR), on β1-ARs expressed in CHO-K1 or HEK 293 cells. Immunohistochemical and radioligand-binding studies demonstrated that mAb3 was able to bind to ECL2 of the tβ1-AR, but not its human homologue. Specific binding of mAb3 to tβ1-AR was inhibited by a peptide based on the turkey, but not the human, ECL2 sequence. Studies with [3H]-CGP 12177 demonstrated that mAb3 prevented the binding of orthosteric ligands to a subset (circa 40%) of turkey β1-receptors expressed in both CHO K1 and HEK 293 cells. MAb3 significantly reduced the maximum specific binding capacity of [3H]-CGP-12177 without influencing its binding affinity. Substitution of ECL2 of tβ1-AR with its human equivalent, or mutation of residues D186S, P187D, Q188E prevented the inhibition of [3H]-CGP 12177 binding by mAb3. MAb3 also elicited a negative allosteric effect on agonist-stimulated cAMP responses. The identity of the subset of turkey β1-adrenoceptors influenced by mAb3 remains to be established but mAb3 should become an important tool to investigate the nature of β1-AR conformational states and oligomeric complexes.
机译:<!-fig ft0-> <!-fig @ position =“ anchor” mode =文章f4-> <!-fig mode =“ anchred” f5-> <!-fig / graphic | fig / alternatives / graphic mode =“ anchored” m1-> class =“ kwd-title”>本文研究的化合物: Alprenolol(Pubchem CID:2119),CGP 12177(Pubchem CID:2687) ,CGP 20712A(Pubchem CID:2685),西马特罗(Pubchem CID:2755),呋喃嗪(Pubchem CID:219083),Hoechst 33342(Pubchem CID:1464),IBMX(Pubchem CID:3758),ICI 118551(Pubchem CID:5484725) ),异丙肾上腺素(Pubchem CID:5807),普萘洛尔(Pubchem CID:4946) class =“ kwd-title”>缩写: ATCM,变构三元复合物模型; CHO,中国仓鼠卵巢; CRE,cAMP反应元件; ECL,细胞外环; HEK,人类胚胎肾脏; mAb,单克隆抗体; SPAP,胎盘分泌的碱性磷酸酶; StaR,稳定受体 class =“ kwd-title”>关键字: GPCR,变构作用,单克隆抗体,细胞外环2 class =“ head no_bottom_margin” id =“ ab010title”>摘要最新兴趣集中在可以区分不同受体构象的抗体上。在这里,我们表征了针对纯化的热稳定火鸡β1-肾上腺素受体(β1AR-m23StaR)产生的单克隆抗体(mAb3)对在CHO-K1或HEK 293细胞中表达的β1-AR的作用。免疫组织化学和放射性配体结合研究表明,mAb3能够结合tβ1-AR的ECL2,但不能结合其人类同源物。 mAb3与tβ1-AR的特异性结合被基于火鸡的肽抑制,而不是基于人ECL2序列。对[ 3 H] -CGP 12177的研究表明,mAb3阻止了正构配体与在CHO K1和HEK 293细胞中表达的一部分火鸡β1受体(约40%)结合。 MAb3显着降低了[ 3 H] -CGP-12177的最大比结合能力,而没有影响其结合亲和力。 tβ1-AR的ECL2被其人类等同物取代,或残基D186S,P187D,Q188E的突变阻止了mAb3对[ 3 H] -CGP 12177结合的抑制。 MAb3还对激动剂刺激的cAMP反应产生负面的变构作用。受mAb3影响的火鸡β1-肾上腺素受体子集的身份仍有待确定,但mAb3应成为研究β1-AR构象态和寡聚复合物性质的重要工具。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号