The innate immune protein Nod2 binds directly to MDP, a bacterial cell wall fragment.

The innate immune protein Nod2 binds directly to MDP, a bacterial cell wall fragment.
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DOI:
10.1021/ja303883c
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发表时间:
2012-08-22
影响因子:
15
通讯作者:
O'Shea EK
O'Shea EK
中科院分区:
化学1区
文献类型:
--
作者:
Grimes CL;Ariyananda Lde Z;Melnyk JE;O'Shea EK

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哺乳动物Nod2是一种细胞内蛋白质,涉及对细菌细胞壁的先天免疫应答,并与克罗恩病、Blau综合征和胃肠道癌症的发展相关。Nod2是对胞壁酰二肽(MDP)的免疫应答所必需的,MDP是细菌细胞壁的免疫刺激片段,但尚不清楚MDP是否直接与Nod2结合。我们报道了人Nod2基因在昆虫细胞中的表达和纯化。使用新的MDP自组装单分子膜(SAMs),我们提供了第一个生化证据,Nod2和MDP之间的直接,高亲和力的相互作用。
Mammalian Nod2 is an intracellular protein that is implicated in the innate immune response to the bacterial cell wall and is associated with the development of Crohn’s disease, Blau syndrome, and gastrointestinal cancers. Nod2 is required for an immune response to muramyl dipeptide (MDP), an immunostimulatory fragment of bacterial cell wall, but it is not known whether MDP binds directly to Nod2. We report the expression and purification of human Nod2 from insect cells. Using novel MDP self-assembled monolayers (SAMs), we provide the first biochemical evidence for a direct, high-affinity interaction between Nod2 and MDP.
DOI: 10.1126/science.1184004
发表时间: 2010-01-15
期刊: Science (New York, N.Y.)
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