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在巨孔树脂上从肺炎链球菌 (Streptococcus pneumoniae) 获得的工程细菌配体,用于对分泌IgA的选择性亲和度捕获

David Scheich¹, Andres Männik², Oliver Meikar²

¹Department of Biotechnology and Food Science, Institute of Bioprocess Science and Engineering, BOKU University, Vienna, Austria.

Biotechnology and bioengineering

|March 9, 2026

概括

一种新的净化方法使用Streptococcus pneumoniae SpsA蛋白来选择性地捕获分泌免疫球蛋白A (sIgA). 这种亲和色谱树脂为sIgA生物制药生产提供了可扩展的解决方案.

科学领域:

生物制药净化生物制药净化
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:

分泌性免疫球蛋白A (sIgA) 是一种重要的生物制药候选物.
目前用于sIgA的净化方法缺乏标准化.
需要有选择性和可扩展的sIgA净化策略.

研究的目的:

开发一种用于sIgA净化的新型亲和色谱树脂.
为了使Streptococcus pneumoniae表面蛋白A (SpsA) 变体作为一种亲和关系连接体变动不动.
为了优化连接体的方向,增强sIgA结合.

主要方法:

通过将SpsA变种固定在环氧激活支上,开发了一种新的亲和树脂.
通过单个半氨酸残留物用于连接体固定,使用定向的附着.
转移了氨酸残留物以优化SpsA联体的方向和功能.

主要成果:

在基于阿加罗斯的支架上实现了177nmolSpsA/mL树脂的固定.
证明了9.1 mgsIgA/mL树脂的平衡结合能力.
成功净化了sIgA从高选择性的细胞培养超沉积物中,最大限度地减少了杂质.

结论:

优化SpsA连接体定向对于功能亲和树脂至关重要.
基于SpsA的亲和色谱为sIgA提供了选择性和潜在的可扩展的净化过程.
这种新型树脂解决了生物制药开发中标准化sIgA净化需求.

关键词:

亲属性染色学是一种亲属性染色学.下游加工是下游加工.带固定运动带固定运动树脂的发展树脂的发展.进行分泌抗体.

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