活性重组蛋白 Recombinant Human DC-SIGN / CD209 / CLEC4L Protein　重组蛋白

研究方向

DC-SIGN/CD209 蛋白表达于未成熟树突状细胞 (DC) 表面，是关键的病原体识别受体，在启动初级免疫反应中发挥着至关重要的作用。该受体参与病原体的内吞作用，导致其随后在溶酶体室内降解。在此过程之后，DC-SIGN 返回细胞膜表面，通过 MHC II 类蛋白将病原体衍生的抗原呈递给静息 T 细胞，从而触发适应性免疫反应。在 DC 上，它充当 ICAM2 和 ICAM3 的高亲和力受体，与甘露糖样碳水化合物结合。值得注意的是，DC-SIGN 可能充当 DC 滚动受体，通过与内皮 ICAM2 相互作用，促进 DC 前体从血流跨内皮迁移到组织。此外，它似乎通过与 DC 和 T 细胞之间形成的免疫突触内 T 细胞上的 ICAM3 结合来调节 DC 诱导的 T 细胞增殖。

种属

Human

表达宿主

HEK293 cells

Calculated MW

40.28 kDa

Observed MW

40-50 kDa

标签

C-His

纯度

> 95% by SDS-PAGE.

内毒素

<0.1EU/μg

制剂

Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4.

描述

Recombinant Human DC-SIGN/CD209 Protein is produced by HEK293 cells expression system. The target protein is expressed with sequence (Gln59-Ala404) of human CD209/DC-SIGN (Accession #NP_066978.1) fused with a 6×His tag at the C-terminus.

储存

Store at -20℃.Store the lyophilized protein at -20℃ to -80 ℃ up to 1 year from the date of receipt.
After reconstitution, the protein solution is stable at -20℃ for 3 months, at 2-8℃ for up to 1 week.未开盖的干粉蛋白在 -20°C至-80°C可保存12个月；
复溶之后，蛋白溶液在-20°C及以下可保存3个月，在2-8℃可保存1周。

生物活性

Measured by the ability of the immobilized protein to support the adhesion of ICAM-3 expressing CHO Chinese hamster ovary cells. When 5 x 104 cells/well are added to Recombinant Human DC_x001e_SIGN/CD209 Protein coated plates (5 μg/mL with 100 μL/well), approximately 10-20% of added cells will adhere after 1 hour at 37℃.

复溶

Centrifuge the vial before opening. Reconstitute to a concentration of 0.1-0.5 mg/mL in sterile distilled water. Avoid vortex or vigorously pipetting the protein. For long term storage, it is recommended to add a carrier protein or stablizer (e.g. 0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose), and aliquot the reconstituted protein solution to minimize free-thaw cycles.收到重组蛋白产品之后请检查蛋白冻干粉末是否贴于瓶底，如果粉末浮起，开盖之前请先低温离心。将蛋白用说明书中指定的缓冲液复溶至0.1-0.5 mg/mL（请注意蛋白复溶浓度不能低于0.1 mg/mL），室温平衡5-10 min保证充分溶解，复溶过程中请不要剧烈涡旋及吹打蛋白溶液。如需长期储存，建议复溶时添加载体蛋白或者稳定剂（如0.1% BSA, 5% HSA, 10% FBS 或者 5% 海藻糖），同时将复溶后的蛋白溶液按照需求进行分装，储存于-20°C至-80°C，随取随用，避免反复冻融。

背景信息

Dendritic cell (DC)-specific intercellular adhesion molecule 3 (ICAM-3) grabbing nonintegrin (DC-SIGN), also known as CD209, is a type II transmembrane protein on DCs with a C-type lectin extracellular domain, is capable of binding ICAM-3 on resting T cells in the secondary lymphoid organs, providing the initial contact between these cells during the establishment of cell-mediated immunity. It is not only a pattern recognition receptor but implicated in immunoregulation of DCs. It has an important role in mediating DC adhesion, migration, inflammation, activating primary T cell, triggering immune response and participating in immune escape of pathogens and tumors. DC-SIGN also mediates the capture and internalization of viral, bacterial, and fungal pathogens by dendritic cells, such as HIV-1, Ebola virus, cytomegalovirus, Dengue virus, and hepatitis C virus. DC-SIGN is unique in that it regulates adhesion processes, such as DC trafficking and T-cell synapse formation, as well as antigen capture. Moreover, even though several C-type lectins have been shown to bind HIV-1, DC-SIGN does not only capture HIV-1 but also protects it in early endosomes allowing HIV-1 transport by DC to lymphoid tissues, where it enhances trans infection of T cells.

基因ID

30835

Swiss Prot

Q9NNX6-1

别名

CD209;CDSIGN;CLEC4L;DC-SIGN;DC-SIGN1; CLEC4L; DC-SIGN; DC-SIGN1