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Identification and Characterization of Peptides Binding AgEG1 from a Phage Display Library
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作者 Chen Min Zhang Zhi-yi 《Forestry Studies in China》 CAS 2005年第4期1-4,共4页
Endoglucanases are the main cellulolytic enzymes digestion as well as its good kinetic properties make it an attractive of Anoplophora glabripennis. Their high activities in cellulose target for development of cellula... Endoglucanases are the main cellulolytic enzymes digestion as well as its good kinetic properties make it an attractive of Anoplophora glabripennis. Their high activities in cellulose target for development of cellulase inhibitors. In this study, random pepfide phage display technology was employed to identify peptides that bound the AgEG1, a member of endoglucanase isozymes. Phage clones with peptide LPPNPTK and XPP (X is residue T, L, A or H) motif frequently occurred in the selected phage population and showed a higher phage recovery than other clones. Peptide LPPNPTK was chemically synthesized and characterized tor its binding activities to AgEG1. The synthetic peptide exhibited high specificity for AgEG1. The peptide LPPNPTK has the potential to be developed into inhibitors of the endoglucanase of A. glabripennis. 展开更多
关键词 larvae of Anoplophora glabripennis random peptide phage display library AgEG 1 synthetic peptide
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金黄色葡萄球菌肠毒素SEC3抑制剂的筛选及活性鉴定 被引量:1
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作者 王敏 郑荣 +3 位作者 黄珍 李先平 张婷婷 曹虹 《中国病原生物学杂志》 CSCD 北大核心 2014年第4期299-302,308,共5页
目的从噬菌体随机12肽库中筛选出金黄色葡萄球菌SEC3抑制剂并鉴定其活性。方法用纯化的重组的金黄色葡萄球菌SEC3包被酶标板,按吸附-洗脱-扩增的淘洗过程对噬菌体随机12肽库进行3轮筛选;用竞争ELISA法观察单个噬菌体克隆的竞争抑制效应... 目的从噬菌体随机12肽库中筛选出金黄色葡萄球菌SEC3抑制剂并鉴定其活性。方法用纯化的重组的金黄色葡萄球菌SEC3包被酶标板,按吸附-洗脱-扩增的淘洗过程对噬菌体随机12肽库进行3轮筛选;用竞争ELISA法观察单个噬菌体克隆的竞争抑制效应,评价其活性。结果噬菌体3轮筛选的投入产出比逐轮升高,回收率从4.5×10-6升高至6.3×10-4,升高140倍,提示具有良好的富集效果;与阴性对照(未加噬菌体)相比,随机挑选的8个噬菌体克隆(A1~A8)竞争抑制率为10.6%~38.3%,差异有统计学意义(t值为9.0~23.5,P〈0.05),其中A1平均竞争抑制率最高,为(30.5±7.4)%,A5的平均竞争抑制率最小,为(16.4±4.7)%。以噬菌体滴度对数值为x轴,以克隆噬菌体各滴度对应的平均竞争抑制率为y轴,绘制竞争抑制曲线,其回归方程为Y=2.7943X-4.7733,相关系数r=0.935,决定系数R2=0.8727。在噬菌体滴度在108~1012pfu范围内,随着噬菌体滴度的增高,其抑制率也增高,且克隆噬菌体滴度在1011pf或1012pfu的竞争抑制率最高。结论用纯化的SEC3从噬菌体随机12肽库中筛选的SEC3抑制剂具有一定的竞争抑制活性,而且竞争抑制活性随着噬菌体滴度的增高而增强。 展开更多
关键词 金黄色葡萄球菌 肠毒素 抑制剂 噬菌体随机肽库
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