使用SpyCatcher-SpyTag固定的Leloir-glycosyltransferases进行糖甘合成
Philip Palm1, Kai Philip Hussnaetter1, Lothar Elling2
1Laboratory for Biomaterials, Institute for Biotechnology and Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany.
Applied microbiology and biotechnology
|October 24, 2025
概括
本研究介绍了一种使用SpyCatcher-SpyTag技术的新型酶固定方法,用于高效合成人乳寡糖化物 (HMO). 这种技术提高了酶的稳定性和可重复使用性,使复杂的HMO结构的成本效益高的生产成为可能.
科学领域:
- 葡萄糖生物学 葡萄糖生物学
- 生物技术是生物技术.
- 酶工程是什么? 酶工程是什么?
背景情况:
- 人母乳寡糖 (HMO) 对婴儿发育和健康至关重要,需要高效的生产方法.
- 酶合成为HMO提供了高选择性,但酶成本和稳定性是重大挑战.
- 酶固定是提高酶基甘合成的经济可行性和实用性的关键策略.
研究的目的:
- 开发一种使用SpyCatcher-SpyTag技术的Leloir-glycosyltransferases (GTs) 的多功能和强大的酶固定化技术.
- 为了表征固定GT的最佳反应条件,稳定性和可重复使用性.
- 为了证明固定GT的实用性,用于合成各种复杂的HMO.
主要方法:
- 使用SpyCatcher-SpyTag技术将五种不同的GTs (β4GalT,LgtA,WbgO,FutC,GTA/R176G) 固定在马莱胺激活的糖上.
- 描述了缓冲系统,pH最佳值,双价离子要求和基质动力学的固定酶.
- 使用固定酶进行单和序列合成,以产生目标HMO.
主要成果:
- 在所有五个GT中都保持了酶活性,实现了高的固定产量 (67100%).
- 已证明固定酶的长期稳定性 (超过1个月) 和可重复使用性 (在3天内进行6次反应).
- 成功合成了关键的HMO,包括Lacto-N-tetraose (LNT),Lacto-N-neotetraose (LNnT),以及复杂的fucosylated结构,如LNFP I和血液组A抗原.
结论:
- 该SpyCatcher-SpyTag固定化策略提供了一个具有成本效益和高效的平台,用于生产高纯度的HMO.
- 固定式GT表现出卓越的稳定性和可重复使用性,克服了自由酶合成的局限性.
- 这种方法有助于可扩展的生产各种HMO结构用于研究和潜在的治疗应用.
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