纯度 | >90%SDS-PAGE. |
种属 | Human |
靶点 | TNFRSF18 |
Uniprot No | Q9Y5U5 |
内毒素 | < 0.01EU/μg |
表达宿主 | E.coli |
表达区间 | 26-162aa |
氨基酸序列 | QRPTGGPGCGPGRLLLGTGTDARCCRVHTTRCCRDYPGEECCSEWDCMCVQPEFHCGDPCCTTCRHHPCPPGQGVQSQGKFSFGFQCIDCASGTFSGGHEGHCKPWTDCTQFGFLTVFPGNKTHNAVCVPGSPPAEP |
预测分子量 | 40.8 kDa |
蛋白标签 | His tag N-Terminus |
缓冲液 | PBS, pH7.4, containing 0.01% SKL, 1mM DTT, 5% Trehalose and Proclin300. |
稳定性 & 储存条件 | Lyophilized protein should be stored at ≤ -20°C, stable for one year after receipt. Reconstituted protein solution can be stored at 2-8°C for 2-7 days. Aliquots of reconstituted samples are stable at ≤ -20°C for 3 months. |
复溶 | Always centrifuge tubes before opening.Do not mix by vortex or pipetting. It is not recommended to reconstitute to a concentration less than 100μg/ml. Dissolve the lyophilized protein in distilled water. Please aliquot the reconstituted solution to minimize freeze-thaw cycles. |
以下是关于TNFRSF18重组蛋白的3篇参考文献示例(注:文献为虚拟示例,仅供格式参考):
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1. **文献名称**: *Structural characterization of TNFRSF18 recombinant protein and its interaction with GITRL*
**作者**: Zhang Q, et al.
**摘要**: 本研究通过重组表达技术制备了可溶性TNFRSF18蛋白,并利用X射线晶体学解析其三维结构,揭示了其与配体GITRL结合的关键结构域,为靶向该通路的药物设计提供了分子基础。
2. **文献名称**: *Recombinant TNFRSF18-Fc fusion protein enhances T cell activation in vitro and tumor immunity in vivo*
**作者**: Lee S, et al.
**摘要**: 构建了TNFRSF18-Fc融合蛋白,证明其能有效阻断调节性T细胞(Treg)的抑制功能,并在体外实验中增强效应T细胞的增殖与细胞因子分泌。动物实验显示其显著抑制黑色素瘤生长。
3. **文献名称**: *Optimized production of bioactive TNFRSF18 in E. coli and functional validation in autoimmune models*
**作者**: Müller R, et al.
**摘要**: 开发了一种基于大肠杆菌的高效TNFRSF18重组蛋白表达系统,通过复性工艺获得具有生物活性的蛋白。功能实验表明,该蛋白可调节自身免疫模型中的炎症反应,提示其治疗潜力。
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以上文献摘要聚焦于重组蛋白的结构、功能及治疗应用,涵盖基础研究与临床前实验。如需真实文献,建议通过PubMed或Web of Science以关键词“TNFRSF18 recombinant”或“GITR recombinant protein”检索。
**Background of TNFRSF18 Recombinant Protein**
TNFRSF18 (Tumor Necrosis Factor Receptor Superfamily Member 18), also known as glucocorticoid-induced TNFR-related protein (GITR) or activation-inducible TNFR family receptor (AITR), is a type I transmembrane protein belonging to the TNF receptor superfamily. It is primarily expressed on regulatory T cells (Tregs), activated conventional T cells, and innate immune cells. Structurally, TNFRSF18 contains extracellular cysteine-rich domains critical for ligand binding, a transmembrane region, and an intracellular domain that mediates downstream signaling via TRAF (TNF receptor-associated factor) adaptor proteins.
The natural ligand for TNFRSF18. GITRL, is expressed on antigen-presenting cells (APCs). Their interaction plays a dual role in immune regulation: it enhances effector T cell activation and survival while suppressing the immunosuppressive function of Tregs. This dual mechanism positions TNFRSF18 as a key modulator of immune homeostasis and antitumor responses.
Recombinant TNFRSF18 protein is engineered to mimic or modulate this receptor-ligand interaction. It is typically produced using mammalian expression systems (e.g., HEK293 or CHO cells) to ensure proper post-translational modifications, though prokaryotic systems are also explored for cost efficiency. The recombinant protein often includes an Fc fusion tag to improve stability and prolong half-life *in vivo*.
In research and therapeutics, TNFRSF18 recombinant proteins are investigated for their potential in cancer immunotherapy. Agonistic anti-TNFRSF18 antibodies or Fc-fusion proteins aim to boost antitumor immunity by activating effector T cells and neutralizing Treg-mediated suppression. Preclinical studies show promise in enhancing checkpoint inhibitor efficacy, while early-phase clinical trials explore safety and combinatorial approaches. Challenges remain in balancing immune activation with autoimmune risks, necessitating precise targeting strategies. Overall, TNFRSF18 recombinant proteins represent a promising tool for understanding immune regulation and developing next-generation immunotherapies.
在生物科技领域,蛋白研发与生产是前沿探索的关键支撑。艾普蒂作为行业内的创新者,凭借自身卓越的研发实力,每年能成功研发 1000 多种全新蛋白,在重组蛋白领域不断突破。 在重组蛋白生产过程中,艾普蒂积累了丰富且成熟的经验。从结构复杂的跨膜蛋白,到具有特定催化功能的酶、参与信号传导的激酶,再到用于免疫研究的病毒抗原,艾普蒂都能实现高效且稳定的生产。 这一成就离不开艾普蒂强大的技术平台。我们构建了多元化的重组蛋白表达系统,昆虫细胞、哺乳动物细胞以及原核蛋白表达系统协同运作。不同的表达系统各有优势,能够满足不同客户对重组蛋白的活性、产量、成本等多样化的需求,从而提供高品质、低成本的活性重组蛋白。 艾普蒂提供的不只是产品,更是从源头到终端的一站式解决方案。从最初的基因合成,精准地构建出符合要求的基因序列,到载体构建,为蛋白表达创造适宜的环境,再到蛋白质表达和纯化,每一个环节都严格把控。我们充分尊重客户的个性化需求,在表达 / 纯化标签的选择、表达宿主的确定等方面,为客户量身定制专属方案。 同时,艾普蒂还配备了多种纯化体系,能够应对不同特性蛋白的纯化需求。这种灵活性和专业性,极大地提高了蛋白表达和纯化的成功率,让客户的研究项目得以顺利推进,在生物科技的探索道路上助力每一位科研工作者迈向成功。
艾普蒂生物自主研发并建立综合性重组蛋白生产和抗体开发技术平台,包括: 哺乳动物细胞表达平台:利用哺乳动物细胞精准修饰蛋白,产出与天然蛋白相似的重组蛋白,用于药物研发、细胞治疗等。 杂交瘤开发平台:通过细胞融合筛选出稳定分泌单克隆抗体的杂交瘤细胞株,优化后的技术让抗体亲和力与特异性更高,应用于疾病诊断、免疫治疗等领域。 单 B 细胞筛选平台:FACS 用荧光标记和流式细胞仪快速分选特定 B 细胞;Beacon® 基于微流控技术,单细胞水平捕获、分析 B 细胞,挖掘抗体多样性,缩短开发周期。 凭借这些平台,艾普蒂生物为客户提供优质试剂和专业 CRO 技术服务,推动生物科技发展。
艾普蒂生物在重组蛋白和天然蛋白开发领域经验十分丰富,拥有超过 2 万种重组蛋白的开发案例。在四大重组蛋白表达平台的运用上,艾普蒂生物不仅经验老到,还积累了详实的成功案例。针对客户的工业化生产需求,我们能够定制并优化实验方案。通过小试探索、工艺放大以及条件优化等环节,对重组蛋白基因序列进行优化,全面探索多种条件,精准找出最契合客户需求的生产方法。 此外,公司还配备了自有下游验证平台,可对重组蛋白展开系统的质量检测与性能测试,涵盖蛋白互作检测、活性验证、内毒素验证等,全方位保障产品质量。 卡梅德生物同样重视蛋白工艺开发,确保生产出的蛋白质具备所需的纯度、稳定性与生物活性,这对于保障药物的安全性和有效性起着关键作用 ,与艾普蒂生物共同推动着行业的发展。
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