介质素8与树突性葡萄糖氨基酸甘油素作为人工蛋白质甘油素的结合中的二元化和拥挤
Jan-Niklas Dürig1, Christian Schulze2, Mathias Bosse2
1Institute of Pharmacy - Medicinal Chemistry, Freie Universität Berlin, Königin-Luise-Str. 2+4, 14195, Berlin, Germany) Corresponding author.
Chemistry (Weinheim an der Bergstrasse, Germany)
|November 27, 2023
概括
氧化糖氨基酸甘油 (GAG) 增强了对IL-8 (IL-8) 蛋白质的结合亲和力. 这种GAG寡合化聚焦单体IL-8,可能促进其在细胞外基质中的二聚化.
科学领域:
- 生物化学 生物化学
- 葡萄糖生物学 葡萄糖生物学
- 细胞外矩阵生物学 细胞外矩阵生物学
背景情况:
- 葡萄糖氨基甘油 (GAG) 对于细胞外基质 (ECM) 功能至关重要,通过蛋白质相互作用调节细胞过程.
- 蛋白质糖体具有重复的GAG结合动机,这表明多价值相互作用增强了GAG与蛋白质的结合.
研究的目的:
- 为了研究介质素-8 (IL-8) 与合成,定义良好的蛋白质甘氨酸结构的结合.
- 探索GAG的树突性寡合化如何影响IL-8结合亲和力.
主要方法:
- 从非硫化氨酸四糖中合成树突性GAG寡合物的化学合成.
- 使用NMR光谱和异热定位热量计来研究IL-8结合.
主要成果:
- 基GAG寡合化显著增加了对单体和二元IL-8的结合亲和力.
- 单体IL-8与单体GAG (KD = 7.3 μM) 相比,对二元GAG的结合增强 (KD = 0.108 μM).
- 随着GAG二元化 (34nM至5nM),二元性IL-8亲和力得到改善,但固体拥挤限制了随后与寡合性GAG的结合.
结论:
- GAG寡合化强烈放大了IL-8单体的结合.
- 这种放大可能会将单体IL-8集中在ECM中,在生理条件下促进蛋白质二元化.
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