纯度 | >90%SDS-PAGE. |
种属 | Human |
靶点 | CST6 |
Uniprot No | Q15828 |
内毒素 | < 0.01EU/μg |
表达宿主 | E.coli |
表达区间 | 29-149aa |
氨基酸序列 | MGSSHHHHHHSSGLVPRGSHMRPQERMVGELRDLSPDDPQVQKAAQAAVA SYNMGSNSIYYFRDTHIIKAQSQLVAGIKYFLTMEMGSTDCRKTRVTGDH VDLTTCPLAAGAQQEKLRCDFEVLVVPWQNSSQLLKHNCVQM |
预测分子量 | 16 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CST6重组蛋白的3篇代表性文献的虚构示例(仅供格式参考,实际文献需查询数据库):
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1. **文献名称**:*Recombinant Human Cystatin 6 Inhibits Tumor Cell Invasion in Breast Cancer Models*
**作者**:Zhang L, et al.
**摘要**:本研究通过大肠杆菌表达系统成功制备了重组人CST6蛋白,并验证其抑制半胱氨酸蛋白酶(如组织蛋白酶B)的活性。实验表明,重组CST6可显著抑制乳腺癌细胞侵袭,提示其在肿瘤治疗中的潜在应用。
2. **文献名称**:*Structural and Functional Characterization of Recombinant CST6 in Ovarian Cancer*
**作者**:Wang Y, et al.
**摘要**:文章解析了重组CST6蛋白的晶体结构,并通过体外实验证明其通过调控蛋白酶活性抑制卵巢癌细胞迁移。研究为靶向CST6的抗癌药物设计提供了结构基础。
3. **文献名称**:*Expression and Purification of CST6 in Pichia pastoris: Implications for Epigenetic Therapy*
**作者**:Kim S, et al.
**摘要**:利用毕赤酵母系统高效表达重组CST6蛋白,优化纯化工艺后验证其生物活性。研究发现,CST6可逆转肿瘤细胞的异常DNA甲基化,增强化疗敏感性。
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**注**:以上文献为示例性质,实际研究需通过PubMed、Web of Science等数据库检索关键词(如"recombinant CST6"、"Cystatin 6 expression")。真实文献可能涉及CST6在癌症、免疫调控或蛋白酶抑制中的机制研究。
Cystatin E/M (CST6), a member of the type 2 cystatin family, is a secreted protein encoded by the *CST6* gene, located on human chromosome 11q13. It functions as a potent endogenous inhibitor of cysteine proteases, particularly cathepsins B, L, and S, which are implicated in extracellular matrix degradation, tumor invasion, and metastasis. CST6 plays a critical role in maintaining protease-antiprotease balance, regulating cellular processes such as apoptosis, inflammation, and tissue remodeling.
Originally identified as a tumor suppressor, CST6 is frequently epigenetically silenced in various cancers, including breast, lung, and head and neck carcinomas. Promoter hypermethylation and histone modification are primary mechanisms driving its downregulation, correlating with poor prognosis and aggressive tumor behavior. In breast cancer, for instance, loss of CST6 expression enhances cathepsin-mediated proteolysis, facilitating tumor cell migration, invasion, and metastasis. Conversely, restoring CST6 expression inhibits these processes, highlighting its therapeutic potential.
Recombinant CST6 protein is produced using heterologous expression systems (e.g., *E. coli* or mammalian cells) to study its biochemical and functional properties. This engineered protein retains the ability to bind and inhibit target proteases, making it a valuable tool for investigating tumor biology, drug discovery, and protease-related pathologies. Studies also explore its role in non-cancer contexts, such as inflammatory diseases and neurodegenerative disorders linked to cysteine protease dysregulation.
Current research focuses on CST6's dual role in tumor suppression and immune modulation, as well as strategies to reactivate its expression using demethylating agents or gene therapy. Its potential as a biomarker for early cancer detection or therapeutic response is under active investigation.
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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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