High-affinity recognition of the human C-reactive protein independent of phosphocholine
作者:Jie Yang、Anna-Lena Gustavsson、Martin Haraldsson、Göran Karlsson、Thomas Norberg、Lars Baltzer
DOI:10.1039/c7ob00684e
日期:——
ability to bind. 4-C25L22-DQ which is unrelated to phosphocholine binds in the absence of Ca2+ with a dissociation constant of 760 nM, an order of magnitude lower than that of phosphocholine, the KD of which is 5 μM. The small organic molecule 2-oxo-1,2-dihydroquinoline-8-carboxylic acid (DQ) was designed based on the structural similarities between three hits from a set of compounds selected from a building
已经开发出一种高亲和力的多肽偶联物4-C25L22-DQ用于分子识别人类C反应蛋白CRP(一种众所周知的炎症生物标记物)。CRP是诊断应用中最经常量化的目标之一,也是药物开发中的目标。除抗体外,大多数分子构建体都利用了对磷酸胆碱CRP的已知亲和力,该亲和力依赖于Ca2 +的结合能力。在不存在Ca2 +的情况下,与磷酸胆碱无关的4-C25L22-DQ的离解常数为760 nM,比磷酸胆碱的解离常数低一个数量级,后者的KD为5μM。有机小分子2-oxo-1,2-二氢喹啉-8-羧酸(DQ)是根据选自一组基本化合物的一组化合物的三个命中之间的结构相似性设计的,并通过NMR光谱评估了对CRP的亲和力。在竞争实验中显示4-C25L22-DQ结合CRP的强度比DQ自身高三个数量级,而在下拉实验中显示4-C25L22-DQ从人血清中提取CRP。在Ca2 +离子浓度较低或需要Ca2 +结合剂(例如EDTA或肝