非免疫球蛋白支架结合剂作为有效的亲和关系联结物用于净化广谱血清白蛋白
Hongyu Lu1, Yunqing Sun1, Jie Chen1
1Division of Abdominal Tumor Multimodality Treatment, Cancer Center, NHC Key Lab of Transplant Engineering and Immunology, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, 610041, China.
Talanta
|November 30, 2024
概括
蛋白质G衍生性专结合域 (ABD) 和专结合纳米 (ABNF) 显示出通过亲和染色学进行广谱专净化的前景. 与ABNF相比,ABD显示出与多种白蛋白的结合和净化产量优于ABNF.
科学领域:
- 生物化学 生化学
- 蛋白质工程是指蛋白质工程.
- 亲和染色学是一种亲和染色学.
背景情况:
- 非免疫球蛋白支架结合剂为高亲和度白蛋白净化提供了潜力.
- 使用这些新型结合剂的亲属性染色体的开发仍然未得到充分探索.
- 关键的结合剂包括蛋白质G衍生型蛋白结合域 (ABD),蛋白结合纳米芬素 (ABNF) 和人血清蛋白 Affimer 31 (HSA31).
研究的目的:
- 预测和实验验证ABD,ABNF和HSA31.1.3的白蛋白结合能力.
- 为了评估基于ABD和ABNF的亲和力染色体列对从血中净化专蛋白的疗效.
- 为了比较ABD-和ABNF-HP列在结合亲和力,特异性和净化产量的性能.
主要方法:
- 相互作用结构分析用于初步预测白蛋白-结合剂相互作用.
- 进行了实验测试,以验证各种物种 (HSA,RhSA,MSA,RSA,BSA,RbSA) 专蛋白的预测结合能力.
- 通过NHS激活的HP列与ABD和ABNF配体结合用于亲和染色学,并分析了净化产量和化效率.
主要成果:
- 相互作用预测表明,ABD结合多种白蛋白 (HSA,RhSA,MSA,RSA),ABNF结合HSA和BSA,而HSA31结合没有测试过.
- 实验结果证实了ABD的宽频结合,在MSA和RSA净化中表现优于ABNF (约. 20毫克的收益率).
- ABNF显示较高的BSA结合和净化 (产量为5-8毫克),而HSA31显示微不足道的专蛋白结合.
- ABD-和ABNF-HP列实现了类似的配体密度,但ABD-HP列产生的净化HSA,RhSA,MSA和RSA的3-4倍.
结论:
- 来自G蛋白的ABD是用于宽谱白蛋白净化的高效结合剂,在多种物种中表现出比ABNF更优异的性能.
- ABNF-HP柱子对BSA净化有效,展示了其特定的结合能力.
- 无论是ABD-还是ABNF结合的HP列,都代表了在研究和潜在的临床环境中用于多种类型的白蛋白净化应用的新工具.
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