1. 重组蛋白
  2. Cytokines and Growth Factors
  3. Interleukin & Receptors
  4. IL-36
  5. IL-36 gamma

IL-36 gamma  (白细胞介素-36γ)

IL-36 gamma (IL-1F9) 是 IL-36 家族的其中一个亚型,属于 IL-1 超家族。人IL-36 gamma 与小鼠 IL-36 gamma 的氨基酸序列同源性 <40%。L-36 gamma 具有 β-三叶草结构。L-36 gamma 介导炎症反应。L-36 beta 可与 IL-36R 结合并募集辅助受体 IL-1RAcP。因此,所形成的异二聚体信号复合物使得 2 条受体链的 Toll/IL-1R (TIR) 结构域紧密靠近,从而激活 NF-κB 和 MAPK 信号通路[1]。但这种激活需要中性粒细胞来源的蛋白酶对 IL-36 alpha 的 N 端 (Val15 位点) 进行切割,如:组织蛋白酶 G (cathepsin G)、弹性蛋白酶 (elastase) 和蛋白酶 3 (proteinase-3)[2]。IL-36 gamma 在外周血淋巴细胞、角质细胞、支气管上皮细胞和 THP-1 细胞中表达[3]。IL-36 gamma 与慢性炎症和癌症有关。IL-36 gamma 在皮肤银屑病皮损、赫氏病患者结肠内神经节区和神经节区,以及炎症性肠病 IBD 患者的炎症粘膜中上调[1][4]

IL-36 gamma (IL-1F9), a subform of IL-36 family, belongs to IL-1 superfamily. Human IL-36 gamma shares <55% aa sequence identity with mouse. IL-36 gamma has β-trefoil structure. L-36 gamma mediates inflammatory response. L-36 gamma binds to IL-36R and recruits the co-receptor IL-1RAcP. So that heterodimeric signaling complex brings Toll/IL-1R (TIR) domains of the 2 receptor chains in close proximity, and thereby activating NF-κB and MAPK signaling pathways[1]. But the activation requires N-terminal cleavage at Val1518 by neutrophil granule-derived proteases, such as cathepsin G, elastase and proteinase-3[1][2].IL-36 gamma is expressed in peripheral blood lymphocytes, keratinocytes, bronchial epithelial cells and THP-1 cells[3]. IL-36 gamma is associated with chronic inflammation and cancers. IL-36 gamma is up-regulated in skin psoriatic lesions, inaganglionic and ganglionic areas of the colon in patients with Hirschsprung's disease, and inflamed mucosa of patients with inflammatory bowel disease (IBD)[1][4].

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