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Proteases and Protease-activated receptors signalling: at the crossroads of acquired and innate immunity.

机译:蛋白酶和蛋白酶激活的受体发出信号:处于获得性免疫和先天免疫的十字路口。

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摘要

Protease-activated receptors (PARs) are seven-transmem-brane G-protein coupled receptors activated by serine proteases (Fig. l). Proteases cleave the extracellular N-terminus of the molecule to expose a new tethered ligand, which in turn binds and activates the cleaved receptor. Four PARs have been cloned and each has a unique cleavage site ammo acid sequence. Tryspin activates PAR2 and PAR4. Thrombin activates PARl and PAR3. Of particular interest for allergic disease, mast cell tryp-tase activates PAR2.
机译:蛋白酶激活受体(PARs)是被丝氨酸蛋白酶激活的七跨膜G蛋白偶联受体(图1)。蛋白酶切割该分子的细胞外N端,以暴露新的束缚配体,该束缚配体继而结合并激活被切割的受体。已克隆了四个PAR,每个PAR具有一个独特的切割位点氨基酸序列。 Tryspin激活PAR2和PAR4。凝血酶激活PAR1和PAR3。对于过敏性疾病特别感兴趣,肥大细胞胰蛋白酶激活PAR2。

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