湿-干-湿实验可以同时进行Aptamer隔离和关键绑定域识别
Keyi Hu1, Yajing Gao1, Yu Zhang1
1Department of Chemistry, Capital Normal University, Xisanhuan North Road 105, Beijing 100048, China.
Analytical chemistry
|February 6, 2026
概括
这项研究引入了一种新的湿-干-湿方法,用于同时分离与拉巴胺素结合的阿普坦和识别它们的关键结合域 (CBD). 这种高效的策略绕过了传统的亲和力选,使得快速发现和表征aptamer.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 化学生物学 化学生物学
背景情况:
- 识别aptamer关键结合域 (CBD) 通常需要广泛的亲和力选.
- 目前用于胺体隔离和CBD识别的方法通常耗时且劳动密集.
研究的目的:
- 开发和验证一种高效的湿干湿实验策略,用于同时分离aptamer和识别其CBD.
- 将这种方法应用于隔离与拉巴胺素结合的体和其CBD的特征.
主要方法:
- 进行了15轮的捕获-SELEX (通过指数式丰富对联体的系统演化) 进行了初始图书馆丰富.
- 高通量测序数据分析,包括K-mer组合,RBM (受限制的博尔兹曼机器) 和mFold模拟,确定了关键的阿普坦结构动机 (3S3L和3S3L-A).
- 第二次捕获-SELEX (6轮) 在结构封闭的库中进行,然后进行测序以识别高亲和度的体及其CBDs.
主要成果:
- 该研究成功地分离了具有纳米分子解离常数和高特异性的拉巴素结合性体.
- 一个11核酸CBD被确定,在这个域内的突变证实了它在结合中的关键作用.
- 开发了一种链位移光传感器,实现了人类血清中拉巴胺的纳米分子检测极限.
结论:
- 开发的湿-干-湿策略提供了一种高效且同时的方法来隔离aptamer和CBD识别.
- 这种方法显著减少了对众多序列的费力亲和力测试的需要.
- 这种方法可能适用于各种分子标的体的发现和表征.
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