纯度 | >90%SDS-PAGE. |
种属 | E.coli |
靶点 | pstS1 |
Uniprot No | P9WGU0 |
内毒素 | < 0.01EU/μg |
表达宿主 | E.coli |
表达区间 | 24-373aa |
氨基酸序列 | CGSKPPSGSPETGAGAGTVATTPASSPVTLAETGSTLLYPLFNLWGPAFHERYPNVTITAQGTGSGAGIAQAAAGTVNIGASDAYLSEGDMAAHKGLMNIALAISAQQVNYNLPGVSEHLKLNGKVLAAMYQGTIKTWDDPQIAALNPGVNLPGTAVVPLHRSDGSGDTFLFTQYLSKQDPEGWGKSPGFGTTVDFPAVPGALGENGNGGMVTGCAETPGCVAYIGISFLDQASQRGLGEAQLGNSSGNFLLPDAQSIQAAAAGFASKTPANQAISMIDGPAPDGYPIINYEYAIVNNRQKDAATAQTLQAFLHWAITDGNKASFLDQVHFQPLPPAVVKLSDALIATIS |
预测分子量 | 39.8 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3篇关于pstS1重组蛋白的参考文献及其摘要概括:
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1. **文献名称**: *"Evaluation of recombinant phosphate-binding protein PstS1 of Mycobacterium tuberculosis as a diagnostic marker for tuberculosis"*
**作者**: Li et al.
**摘要**: 该研究在大肠杆菌中表达并纯化了重组pstS1蛋白,评估其作为结核病血清学诊断标志物的潜力。结果显示,pstS1抗原在活动性结核患者血清中具有较高特异性抗体反应,但与卡介苗接种者存在一定交叉反应。
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2. **文献名称**: *"Cloning, expression, and immunogenicity of novel fusion protein antigens based on PstS1 (Rv0934) of Mycobacterium tuberculosis"*
**作者**: Karbalaei et al.
**摘要**: 研究通过基因工程技术将pstS1与其他结核抗原(如ESAT-6)融合表达,评估重组融合蛋白的免疫原性。实验表明,融合蛋白能诱导小鼠产生更强的Th1型细胞免疫应答,提示其在亚单位疫苗开发中的应用前景。
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3. **文献名称**: *"Biochemical characterization of the Mycobacterium tuberculosis phosphate transport system component PstS1"*
**作者**: Braibant et al.
**摘要**: 通过体外重组表达pstS1蛋白,验证其作为磷酸盐转运系统关键组分的功能。研究揭示了pstS1与磷酸盐的高亲和力结合特性,并探讨其在结核分枝杆菌环境适应中的分子机制。
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4. (可选补充)
**文献名称**: *"Improving tuberculosis diagnosis by combining recombinant PstS1 antigen with traditional smear microscopy"*
**作者**: Wang et al.
**摘要**: 提出将重组pstS1抗原的ELISA检测与传统痰涂片法联用,可显著提高结核病早期诊断的敏感性和特异性,尤其在涂片阴性病例中显示出重要辅助价值。
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这些研究聚焦于pstS1重组蛋白的表达优化、诊断应用及免疫机制解析,可作为结核病检测技术或疫苗研发的参考依据。
**Background of pstS1 Recombinant Protein**
The pstS1 recombinant protein is derived from the *pstS1* gene, which encodes a phosphate-binding transporter subunit in *Mycobacterium tuberculosis* (Mtb), the causative agent of tuberculosis (TB). This protein is part of the phosphate-specific transport (Pst) system, a critical mechanism for bacterial phosphate uptake under low-phosphate conditions. The Pst system, composed of subunits PstS, PstC, PstA, and PstB, enables Mtb to scavenge inorganic phosphate (Pi) from host environments, supporting survival and virulence during infection.
Structurally, pstS1 is a periplasmic substrate-binding protein that captures extracellular phosphate and transfers it to the transmembrane permease components (PstA/PstC) for transport into the cytoplasm. Its high-affinity phosphate-binding capability makes it essential for Mtb’s adaptation to phosphate-limited niches, such as macrophages. Beyond nutrient acquisition, studies suggest pstS1 may modulate host immune responses, potentially aiding immune evasion.
Recombinant pstS1 is produced via genetic engineering, often in *E. coli* expression systems, to study its biochemical properties, antigenicity, and role in pathogenesis. It has garnered interest as a diagnostic or vaccine candidate due to its immunogenicity in TB patients. Antibodies against pstS1 are detected in sera from active TB cases, highlighting its potential as a serodiagnostic marker. Additionally, its conservation across Mtb strains and involvement in critical metabolic pathways make it a target for novel therapeutics aimed at disrupting bacterial phosphate homeostasis.
Current research focuses on elucidating its structural-functional relationships, host interactions, and utility in TB control strategies, particularly in the context of drug-resistant TB. The protein’s recombinant form enables scalable production for immunological assays, structural studies, and preclinical evaluations. Understanding pstS1’s role in Mtb physiology and host-pathogen dynamics remains pivotal for advancing TB diagnostics, vaccines, and treatments.
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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