预B细胞受体作为在预B细胞表面对加勒-1的选择性开关
Pauline Touarin1, Bastien Serrano1, Audrey Courbois1
1Laboratoire d'Ingénierie des Systèmes Macromoléculaires (LISM UMR7255), Institut de Microbiologie de la Méditerranée, Institut de Microbiologie, Bioénergies et Biotechnologies, CNRS, Aix-Marseille University, Marseille, France.
Cell reports
|July 26, 2024
概括
与非糖化蛋白的相互作用,比如前B细胞受体 (pre-BCR),改变了加勒-1与细胞表面甘氨酸的结合. 它通过将加勒-1的焦点切换到特定的糖基因来调节BCR前激活.
科学领域:
- 免疫学 免疫学 免疫学
- 葡萄糖生物学 葡萄糖生物学
- 细胞生物学 细胞生物学
背景情况:
- 盖लेक्ट因是蛋白质,它们在细胞表面结合碳水化合物 (甘氨酸),影响免疫力,细胞迁移和信号传递.
- 盖莱素也结合非糖化蛋白质,如B细胞发育期间的B细胞前受体 (BCR前),但这如何影响它们的糖结合功能尚不清楚.
研究的目的:
- 研究如何与非糖化合作伙伴的相互作用,特别是B细胞前受体 (BCR前),调节加勒-1 (Gal-1) 的糖结合活性.
- 确定参与这种调制的分子机制和特定的甘氨酸结构及其对B细胞发育的影响.
主要方法:
- 在原生细胞膜上进行了核磁共振 (NMR) 实验,观察Gal-1与细胞表面连接体的结合.
- 用分子和细胞测试来确定特定的甘氨酸标,并评估Gal-1-pre-BCR相互作用的功能后果.
主要成果:
- 在BCR前的相互作用被证明可以改变Gal-1与B细胞前的糖化受体的结合.
- 确定了一个选择性切换器,在BCR参与之前,增加了Gal-1对α2,3-sialylated poly-N-acetyllactosamine动机的亲和力.
- 发现这种开关对于调节B细胞发育过程中的BCR前激活至关重要.
结论:
- 与非糖化蛋白的相互作用,以BCR前为例,可以动态调节细胞表面的素的甘氨酸解码能力.
- 这提供了一种新的机制,通过这种机制,蛋白质与蛋白质的相互作用可以在免疫细胞发育等生理过程中微调素的功能.
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