Probing multivalency in ligand-receptor-mediated adhesion of soft, biomimetic interfaces.

Probing multivalency in ligand-receptor-mediated adhesion of soft, biomimetic interfaces.
复制标题

DOI:
10.3762/bjoc.11.82
复制
发表时间:
2015
影响因子:
2.7
通讯作者:
Hartmann L
Hartmann L
中科院分区:
化学4区
文献类型:
--
作者:
Schmidt S;Wang H;Pussak D;Mosca S;Hartmann L

文献摘要

参考文献

被引文献

相似文献

细胞水平上的许多生物学功能是由糖萼(一种致密的碳水化合物呈递层)介导的。在这一层中,碳水化合物配体和蛋白质受体之间形成特异性相互作用,以控制细胞-细胞识别、细胞粘附和相关过程。这项工作的目的是阐明表面锚定的碳水化合物和受体表面之间的复合物形成的原则,通过测量表面结合的甘露糖之间的特定粘附在刀豆球蛋白A(刀豆球蛋白A)层通过聚(乙二醇)-(PEG)为基础的软胶体探针(SCP)。特别强调的是依赖于多价介绍和密度的碳水化合物单位的特定的粘附力。因此,我们首先提出了一种合成策略,该策略允许使用不饱和羧酸(巴豆酸、丙烯酸、甲基丙烯酸)作为甘露糖缀合的接枝单元来控制PEG支架上的官能团的密度变化。我们通过一系列分析技术(ATR-FTIR、拉曼显微镜、zeta电位和滴定)表明,这种合成策略允许接枝密度和接枝长度的直接变化,从而能够在PEG网络上控制甘露糖单元的呈现。最后,我们确定了特定的粘附力的PEG网络共轭甘露糖单位ConA表面作为密度和接枝类型的函数。值得注意的是,结果表明,由于螯合物或亚基结合,甘露糖/刀豆蛋白A相互作用的分子水平增强的情况下。结果似乎支持这样一个事实,即在机械灵活的接口弱碳水化合物的相互作用几乎没有进行多价结合,但只是介导的大量的配体-受体相互作用。
Many biological functions at cell level are mediated by the glycocalyx, a dense carbohydrate-presenting layer. In this layer specific interactions between carbohydrate ligands and protein receptors are formed to control cell–cell recognition, cell adhesion and related processes. The aim of this work is to shed light on the principles of complex formation between surface anchored carbohydrates and receptor surfaces by measuring the specific adhesion between surface bound mannose on a concanavalin A (ConA) layer via poly(ethylene glycol)-(PEG)-based soft colloidal probes (SCPs). Special emphasis is on the dependence of multivalent presentation and density of carbohydrate units on specific adhesion. Consequently, we first present a synthetic strategy that allows for controlled density variation of functional groups on the PEG scaffold using unsaturated carboxylic acids (crotonic acid, acrylic acid, methacrylic acid) as grafting units for mannose conjugation. We showed by a range of analytic techniques (ATR–FTIR, Raman microscopy, zeta potential and titration) that this synthetic strategy allows for straightforward variation in grafting density and grafting length enabling the controlled presentation of mannose units on the PEG network. Finally we determined the specific adhesion of PEG-network-conjugated mannose units on ConA surfaces as a function of density and grafting type. Remarkably, the results indicated the absence of a molecular-level enhancement of mannose/ConA interaction due to chelate- or subsite-binding. The results seem to support the fact that weak carbohydrate interactions at mechanically flexible interfaces hardly undergo multivalent binding but are simply mediated by the high number of ligand–receptor interactions.
DOI: 10.1039/c3cs60097a
发表时间: 2013-05-21
影响因子: 46.2
作者:
Kiessling LL;Grim JC
通讯作者: Grim JC
DOI: 10.1002/jbm.b.31806
发表时间: 2011-07-01
影响因子: 3.4
作者:
Hartmann, Laura;Watanabe, Kenji;Frank, Curtis W.
通讯作者: Frank, Curtis W.
DOI: 10.1002/app.34683
发表时间: 2012-02-15
影响因子: 3
作者:
Li, Guangwu;He, Guanyang;Wang, Huiliang
通讯作者: Wang, Huiliang
DOI: 10.1021/ma9515543
发表时间: 1996-04-22
期刊: MACROMOLECULES
影响因子: 5.5
作者:
Yang, WT;Ranby, B
通讯作者: Ranby, B
DOI: 10.1002/cbic.201000718
发表时间: 2011-05-02
期刊: CHEMBIOCHEM
影响因子: 3.2
作者:
Papp, Ilona;Dernedde, Jens;Haag, Rainer
通讯作者: Haag, Rainer