Binding analysis of peptides that recognize preferentially cis-azobenzene groups of synthetic polymers
作者:J. Chen、T. Serizawa、M. Komiyama
DOI:10.1002/psc.1299
日期:2011.2
Peptides identified by the PD method against a film surface composed of azobenzene‐containing synthetic polymers were characterized by QCM measurements. Among the four peptides analyzed, the c16 peptide with the sequence Trp‐His‐Thr‐Leu‐Pro‐Asn‐Ala showed the highest binding affinity to the films rich in cis‐azobenzene groups. SPR served to determine the association/dissociation constants of the c16
通过QCM测量来表征通过PD方法在由含偶氮苯的合成聚合物组成的薄膜表面上鉴定出的肽。在所分析的四种肽中,序列为Trp-His-Thr-Leu-Pro-Asn-Ala的c16肽对富含顺式-偶氮苯基的薄膜具有最高的结合亲和力。SPR用于确定c16肽对反-和顺-偶氮苯基的缔合/解离常数。结合常数估计分别为1.3×10 5和1.4×10 6 / M,表明c16肽对顺式的高度特异性-偶氮苯构象剂。然后合成c16肽的突变体并进行表征,以获取有关顺式特异性的结构要求的信息。Ala扫描清楚地表明,c16肽的所有氨基酸残基对于特异性都是必不可少的。更重要的是,具有反向序列且含有Gly插入序列的肽的结果证实,特异性严格源自c16肽的一级序列。版权所有©2010欧洲肽协会和John Wiley&Sons,Ltd.。