Cell surface glycan engineering reveals that matriglycan alone can recapitulate dystroglycan binding and function.

Cell surface glycan engineering reveals that matriglycan alone can recapitulate dystroglycan binding and function.
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DOI:
10.1038/s41467-022-31205-7
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发表时间:
2022-06-24
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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α-三聚糖聚糖(α-DG)在o -甘露糖位点上被一种重复的双糖(-木基α1,3- glca β1,3-)n修饰,称为基质聚糖,它是层粘连蛋白- g结构域蛋白的受体,被旧世界沙粒病毒用于感染。利用化学酶合成的基质多糖作为微阵列打印,我们证明了与层粘连蛋白、拉沙病毒GP1和临床重要抗体IIH6的长度依赖性结合。利用酶工程方法,将n-连接的糖蛋白转化为iih6阳性的层粘连蛋白结合糖蛋白。用足够长度的基质多糖在缺乏α-DG或o -甘露糖基化的细胞表面进行工程处理,可以恢复拉沙假病毒的感染。最后,游离基质多糖以剂量和长度依赖的方式抑制野生型细胞的病毒感染。这些结果表明,单独的matriglycan对于IIH6染色、层粘连蛋白和LASV GP1结合以及拉沙假病毒感染是必要的和充分的,并支持了一个模型,即它是一个可调节的受体,其链长增加可以增强配体结合能力。基质聚糖是α-三聚糖聚糖上的重复双糖,是拉沙病毒和特异性细胞外基质蛋白的受体。在这里,作者证明,以一种长度依赖的可调方式,matriglycan是蛋白质结合和病毒感染的必要和充分条件。
α-Dystroglycan (α-DG) is uniquely modified on O-mannose sites by a repeating disaccharide (-Xylα1,3-GlcAβ1,3-)n termed matriglycan, which is a receptor for laminin-G domain-containing proteins and employed by old-world arenaviruses for infection. Using chemoenzymatically synthesized matriglycans printed as a microarray, we demonstrate length-dependent binding to Laminin, Lassa virus GP1, and the clinically-important antibody IIH6. Utilizing an enzymatic engineering approach, an N-linked glycoprotein was converted into a IIH6-positive Laminin-binding glycoprotein. Engineering of the surface of cells deficient for either α-DG or O-mannosylation with matriglycans of sufficient length recovers infection with a Lassa-pseudovirus. Finally, free matriglycan in a dose and length dependent manner inhibits viral infection of wildtype cells. These results indicate that matriglycan alone is necessary and sufficient for IIH6 staining, Laminin and LASV GP1 binding, and Lassa-pseudovirus infection and support a model in which it is a tunable receptor for which increasing chain length enhances ligand-binding capacity. Matriglycan, a repeating disaccharide on α-dystroglycan, is the receptor for Lassa virus and specific extracellular matrix proteins. Here, the authors demonstrate that matriglycan, in a length-dependent tunable manner, is both necessary and sufficient for protein binding and viral infection.
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发表时间: 2013-03
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影响因子: 4.3
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