Selection of synthetic receptors capable of sensing the difference in binding of d-Ala-d-Ala or d-Ala-d-Lac ligands by screening of a combinatorial CTV-based library
作者:Cristina Chamorro、Rob M.J. Liskamp
DOI:10.1016/j.tet.2004.08.074
日期:2004.11
Screening of a combinatorial CTV-based artificial, synthetic receptor library 1 1-13, 1-13, 1-13} for binding of a variety d-Ala-d-Ala and d-Ala-d-Lac containing ligands (6–11) was carried out in phosphate buffer (0.1 N, pH=7.0). After screening and Edman sequencing, synthetic receptors were found containing amino acid sequences, which are either characteristic for binding dye labeled d-Ala-d-Ala
筛选基于组合CTV的人工合成受体文库1 1-13,1-13,1-13}以结合各种d-Ala-d-Ala和d-Ala-d-Lac配体(6 – 11)在磷酸盐缓冲液(0.1 N,pH = 7.0)中进行。经过筛选和Edman测序后,发现含有氨基酸序列的合成受体,该序列是结合染料标记的d-Ala-d-Ala或d-Ala-d-Lac配体的特征。例如,受体能够结合配体含有d-ALA-d丙氨酸6,7,9和11在他们的手臂中包含-几乎在所有情况下-至少包含一个基本氨基酸残基-主要是Lys。这与能够结合含有d-Ala-d-Lac的配体8和10的受体的臂确实是一个惊人的区别,配体8和10通常包含大量的极性氨基酸(Gln和Ser),尤其是在配体8中,但是几乎没有任何碱性氨基酸。使用不同的(荧光)染料标记表明该标记对受体的结合具有深远的影响,尽管不是决定性的。选择了用FITC-肽聚糖筛选CTV库的命中片段(6),以进行重新合成和验证。