Determining the specificity of monoclonal antibody HPT-101 to tau-peptides with optical tweezers.

Determining the specificity of monoclonal antibody HPT-101 to tau-peptides with optical tweezers.
复制标题

用光镊测定单克隆抗体 HPT-101 对 tau 肽的特异性

DOI:
10.1021/nn405303u
复制
发表时间:
2013
期刊:
影响因子:
17.1
通讯作者:
F. Kremer
F. Kremer
中科院分区:
材料科学1区
文献类型:
--
作者:
T. Stangner;C. Wagner;D. Singer;S. Angioletti-Uberti;C. Gutsche;J. Dzubiella;R. Hoffmann;F. Kremer

文献摘要

参考文献

被引文献

相似文献

利用光镊辅助动态力谱技术研究了单结合水平上的受体-配体相互作用。特别是,我们分析了磷酸化特异性单克隆抗体(mAb)HPT-101与具有两个潜在磷酸化位点(Thr 231和Ser 235)的合成tau肽的结合,这是阿尔茨海默病最可能的标志物。尽管酶联免疫吸附试验(ELISA)的典型解释表明,该单克隆抗体仅与双磷酸化tau肽结合,但我们在此通过DFS表明,仅mAb HPT-101的特异性是明显的。事实上,结合也发生在每种单磷酸化肽上。因此,我们通过分析测得的断裂力分布来表征解结合过程,从中提取三种mAb/肽组合的无力键的寿命τ0、特征长度xts和活化自由能Δ G。这些信息被用来建立一个简单的理论模型来预测的双磷酸化的肽的解结合过程的功能完全基于单磷酸化的数据。最后,我们介绍了一种方法,结合联合收割机结合和未结合的测量,以估计相对亲和力的债券。该数量获得的值与ELISA一致,显示DFS如何提供关于动态结合过程的重要见解,而这是这种常见和广泛的测定法无法获得的。
Optical tweezers-assisted dynamic force spectroscopy is employed to investigate specific receptor–ligand interactions on the level of single binding events. In particular, we analyze binding of the phosphorylation-specific monoclonal antibody (mAb) HPT-101 to synthetic tau-peptides with two potential phosphorylation sites (Thr231 and Ser235), being the most probable markers for Alzheimer’s disease. Whereas the typical interpretation of enzyme-linked immunosorbent assay (ELISA) suggests that this monoclonal antibody binds exclusively to the double-phosphorylated tau-peptide, we show here by DFS that the specificity of only mAb HPT-101 is apparent. In fact, binding occurs also to each sort of monophosphorylated peptide. Therefore, we characterize the unbinding process by analyzing the measured rupture force distributions, from which the lifetime of the bond without force τ0, its characteristic lengthxts, and the free energy of activation ΔGare extracted for the three mAb/peptide combinations. This information is used to build a simple theoretical model to predict features of the unbinding process for the double-phosphorylated peptide purely based on data on the monophosphorylated ones. Finally, we introduce a method to combine binding and unbinding measurements to estimate the relative affinity of the bonds. The values obtained for this quantity are in accordance with ELISA, showing how DFS can offer important insights about the dynamic binding process that are not accessible with this common and widespread assay.
通过原子力显微镜和冷冻电子显微镜对阿尔茨海默病中组装的 tau 聚合物进行表征。
DOI: --
发表时间: 2001
期刊: Journal of Alzheimer's Disease
影响因子: --
作者:
F. Moreno;J. Valpuesta;Mar Pérez;J. Colchero;Arturo M. Barö;J. Ávila;E. Montejo de Garcíni
通讯作者: E. Montejo de Garcíni
DOI: 10.1016/j.bbrc.2006.07.099
发表时间: 2006-09
影响因子: 3.1
作者:
Lian-Xiu Zhou;Z. Zeng;Jin‐Tang Du;Yu-Fen Zhao;Yan‐Mei Li
通讯作者: Lian-Xiu Zhou;Z. Zeng;Jin‐Tang Du;Yu-Fen Zhao;Yan‐Mei Li
白光照明下低对比度二氧化硅颗粒的新型基于视频的微球定位算法
DOI: --
发表时间: 2012
期刊:
影响因子: --
作者:
Olaf Ueberschär;C. Wagner;Tim Stangner;C. Gutsche;F. Kremer
通讯作者: F. Kremer
DOI: 10.1016/s0006-3495(97)78802-7
发表时间: 1997-04-01
影响因子: 3.4
作者:
Evans, E;Ritchie, K
通讯作者: Ritchie, K
邻近磷酸化位点作为阿尔茨海默病中 PHF-tau 特异性标记。
DOI: 10.1016/j.bbrc.2006.05.201
发表时间: 2006
影响因子: 3.1
作者:
D. Singer;J. Lehmann;Katja Hanisch;W. Härtig;R. Hoffmann
通讯作者: R. Hoffmann