作者:Hyeon-Jun Jang、Jung-Hyun Na、Bong-Suk Jin、Won-Kyu Lee、Woong-Hee Lee、Hyun-Jin Jung、Seok-Chan Kim、Si-Hyung Lim、Yeon-Gyu Yu
DOI:10.5012/bkcs.2010.31.12.3703
日期:2010.12.20
Biomolecules specific to explosives can be exploited as chemical sensors. Peptides specific to immobilized dinitrotoluene (DNT) were identified using a phage display library. A derivative of DNT that contained an extended amine group, 4-(2,4-dinitrophenyl)butan-1-amine, was synthesized and immobilized using a self-assembled monolayer surface on gold. Filamentous M13 phages displaying random sequences of 12-mer peptides specific to the immobilized DNT-derivate were isolated from the M13 phage library by biopanning. A common peptide sequence was identified from the isolated phages and the synthesized peptides showed selective binding to DNT. When the peptide was immobilized on a quartz crystal microbalance (QCM) chip, it showed a binding signal to DNT, while toluene barely showed significant binding to the QCM chip. These results demonstrate that peptides screened by biopanning against immobilized DNT can be useful for quick and accurate detection of DNT.
爆炸物特有的生物分子可用作化学传感器。使用噬菌体展示文库鉴定了固定化二硝基甲苯 (DNT) 的特异性肽。合成了含有扩展胺基团 4-(2,4-二硝基苯基)丁-1-胺的 DNT 衍生物,并使用自组装单层表面将其固定在金上。通过生物淘选从 M13 噬菌体文库中分离出丝状 M13 噬菌体,该丝状 M13 噬菌体显示出对固定化 DNT 衍生物具有特异性的 12 聚体肽的随机序列。从分离的噬菌体中鉴定出常见的肽序列,并且合成的肽显示出与 DNT 的选择性结合。当肽固定在石英晶体微天平 (QCM) 芯片上时,它显示出与 DNT 的结合信号,而甲苯几乎没有显示出与 QCM 芯片的显着结合。这些结果表明,通过生物淘选针对固定化 DNT 筛选的肽可用于快速、准确地检测 DNT。