Identification of Sequence Selective Receptors for Peptides with a Carboxylic Acid Terminus
摘要:
Split-and-mix libraries of resin-bound "tweezer" receptors have been prepared and screened to identify receptors for dye-labelled tripeptides. The receptors incorporate a diamidopyridine unit to serve as a specific recognition site for the CO2H group, leading to strong and selective receptors for peptide guests with a CO2H terminus. The role of the dye-label, attached to the peptide guest to allow visualisation of selective recognition events in the screening experiments, has also been examined and was found to have a significant influence on the binding selectivities.
Identification of Sequence Selective Receptors for Peptides with a Carboxylic Acid Terminus
摘要:
Split-and-mix libraries of resin-bound "tweezer" receptors have been prepared and screened to identify receptors for dye-labelled tripeptides. The receptors incorporate a diamidopyridine unit to serve as a specific recognition site for the CO2H group, leading to strong and selective receptors for peptide guests with a CO2H terminus. The role of the dye-label, attached to the peptide guest to allow visualisation of selective recognition events in the screening experiments, has also been examined and was found to have a significant influence on the binding selectivities.
Combinatorial libraries of diamidopyridine-derived ‘tweezer’ receptors and sequence selective binding of peptides
作者:Rosa Arienzo、Jeremy D Kilburn
DOI:10.1016/s0040-4020(01)01111-5
日期:2002.1
tweezer receptors with peptidic side-arms has been prepared. Screening experiments with the library and a dye-labelled tripeptide l-Glu–l-Ser–l-Val–OH showed excellent selectivity (strong binding of the dye-labelled guest to ∼0.2% of resin-bound library members was observed) and led to the identification of a tweezer receptor structure, which was shown to bind the tripeptide with good selectivity over
已经制备了具有肽侧臂的由二氨基吡啶衍生的镊子受体的文库。用该文库和染料标记的三肽l-Glu-1-Ser-1-Val-OH进行的筛选实验显示出极好的选择性(观察到染料标记的客体与约0.2%的树脂结合的文库成员有很强的结合力),并且导致鉴定了镊子受体结构,该结构显示与相关的三肽序列具有良好的选择性结合三肽。侧链保护的三肽l-Glu(O t Bu)–l-Ser(tBu)–l-Val–OH对任何特定的文库成员都表现出很小的选择性。使用相同的三肽客体和相关的镊子受体文库,讨论了与先前的筛选实验相关的结果,这些镊子受体文库在将二氨基吡啶单元与镊子受体的肽侧臂分离中,存在一个亚甲基的差异。