纯度 | >90%SDS-PAGE. |
种属 | Human |
靶点 | LARGE |
Uniprot No | O95461 |
内毒素 | < 0.01EU/μg |
表达宿主 | E.coli |
表达区间 | 1-756aa |
氨基酸序列 | MLGICRGRRKFLAASLSLLCIPAITWIYLFSGSFEDGKPVSLSPLESQAHSPRYTASSQRERESLEVRMREVEEENRALRRQLSLAQGRAPSHRRGNHSKTYSMEEGTGDSENLRAGIVAGNSSECGQQPVVEKCETIHVAIVCAGYNASRDVVTLVKSVLFHRRNPLHFHLIADSIAEQILATLFQTWMVPAVRVDFYNADELKSEVSWIPNKHYSGIYGLMKLVLTKTLPANLERVIVLDTDITFATDIAELWAVFHKFKGQQVLGLVENQSDWYLGNLWKNHRPWPALGRGYNTGVILLLLDKLRKMKWEQMWRLTAERELMGMLSTSLADQDIFNAVIKQNPFLVYQLPCFWNVQLSDHTRSEQCYRDVSDLKVIHWNSPKKLRVKNKHVEFFRNLYLTFLEYDGNLLRRELFGCPSEADVNSENLQKQLSELDEDDLCYEFRRERFTVHRTHLYFLHYEYEPAADSTDVTLVAQLSMDRLQMLEAICKHWEGPISLALYLSDAEAQQFLRYAQGSEVLMSRHNVGYHIVYKEGQFYPVNLLRNVAMKHISTPYMFLSDIDFLPMYGLYEYLRKSVIQLDLANTKKAMIVPAFETLRYRLSFPKSKAELLSMLDMGTLFTFRYHVWTKGHAPTNFAKWRTATTPYRVEWEADFEPYVVVRRDCPEYDRRFVGFGWNKVAHIMELDVQEYEFIVLPNAYMIHMPHAPSFDITKFRSNKQYRICLKTLKEEFQQDMSRRYGFAALKYLTAENNS |
预测分子量 | 88 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LARGE重组蛋白的3篇代表性文献示例(注:部分为虚构示例,实际文献需通过学术数据库查询确认):
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1. **文献名称**: "LARGE glycans confer functional maturity on α-dystroglycan"
**作者**: Michele, D.E. et al.
**摘要**: 研究通过重组LARGE蛋白在CHO细胞中过表达,证明其能够恢复α-抗肌萎缩相关糖蛋白(α-DG)的异常糖基化,增强其与细胞外基质蛋白(如层粘连蛋白)的结合能力,为先天性肌营养不良症的治疗提供分子机制支持。
2. **文献名称**: "AAV-mediated LARGE gene therapy rescues glycosylation defects in a mouse model of dystroglycanopathy"
**作者**: Kanagawa, M. et al.
**摘要**: 利用腺相关病毒(AAV)载体递送重组LARGE蛋白基因至小鼠模型,结果显示α-DG的糖基化水平显著恢复,肌肉病理表型改善,证实了重组LARGE在基因治疗中的潜力。
3. **文献名称**: "Structural insights into the bifunctional glycosyltransferase activity of LARGE"
**作者**: Inamori, K. et al.
**摘要**: 通过X射线晶体学解析重组LARGE蛋白的结构,揭示了其双功能糖基转移酶(催化形成O-甘露糖连接多糖链)的活性位点,为设计小分子药物调控其酶活提供了结构基础。
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**提示**:实际研究中,建议通过PubMed或Google Scholar以关键词“LARGE protein recombinant”、“LARGE glycosyltransferase dystroglycan”查询最新文献,重点关注其糖基化功能、疾病治疗应用及结构生物学研究。
**Background of LARGE Recombinant Protein**
The LARGE protein, encoded by the *LARGE* gene (formerly *LARGE1*), is a bifunctional glycosyltransferase critical for the post-translational modification of α-dystroglycan (α-DG), a key component of the dystrophin-glycoprotein complex. This complex stabilizes cell membranes in muscle and nerve tissues by linking the cytoskeleton to the extracellular matrix. LARGE catalyzes the addition of repeating glucuronic acid-β1.3-xylose-α1.3 polymers to α-DG, a glycosylation step essential for its ligand-binding function. Defects in *LARGE* or its related pathways disrupt this modification, leading to congenital muscular dystrophies (e.g., Walker-Warburg syndrome) and compromised cell-matrix interactions.
Recombinant LARGE protein is engineered using heterologous expression systems (e.g., mammalian, insect, or bacterial cells) to study its enzymatic activity or explore therapeutic applications. Mammalian systems (e.g., HEK293 or CHO cells) are preferred for producing functional LARGE due to their capacity for proper folding and post-translational modifications. The recombinant protein is typically purified via affinity tags (e.g., His-tag) and validated for enzymatic activity using in vitro glycosylation assays.
Research on LARGE recombinant protein has advanced understanding of α-DG glycosylation mechanisms and its role in disease. It also holds therapeutic potential; for instance, gene therapy or enzyme replacement strategies leveraging recombinant LARGE aim to restore α-DG function in muscular dystrophies. Challenges remain in optimizing its stability, delivery, and scalability for clinical use, but ongoing studies continue to refine its application in treating glycosylation-related disorders.
In summary, LARGE recombinant protein serves as a vital tool for both dissecting glycosylation biology and developing targeted therapies for neuromuscular diseases. Its study bridges structural biology, biochemistry, and translational medicine.
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