PIGR 蛋白, Human (G365S, HEK293, His)

PIGR proteins play a critical role in mediating the selective transcytosis of polymerized IgA and IgM across mucosal epithelial cells, which is critical for mucosal immunity. PIGR binds these immunoglobulins at the basolateral surface, forming a complex that is transported intracellularly and secreted apically. PIGR Protein, Human (G365S, HEK293, His) is the recombinant human-derived PIGR protein, expressed by HEK293 , with C-His labeled tag and G365S mutation.

PIGR 蛋白在介导聚合 IgA 和 IgM 跨粘膜上皮细胞的选择性转胞吞作用中发挥着至关重要的作用，协调粘膜免疫所必需的过程。该蛋白与上皮细胞基底外侧表面的聚合 IgA 和 IgM 结合，形成复合物，随后转运穿过细胞并在顶端表面分泌。在此转运过程中，发生裂解事件，将细胞外成分（称为分泌成分）与跨膜片段分离。PIGR 通过其 N 连接聚糖确保分泌型 IgA (sIgA) 分子锚定在上皮表面的粘液上，这是中和细胞外病原体的关键机制。游离形式的 PIGR 还可以充当非特异性微生物清道夫，在防止病原体与上皮细胞相互作用方面发挥作用，并有助于更广泛地防御潜在感染。

Human

HEK293

C-His

P01833/NP_002635.2 (K19-R638, G365S)

5284  [NCBI]

80-90 kDa

Greater than 95% as determined by reducing SDS-PAGE

<1 EU/μg, determined by LAL method.