Engineered Pan-Specific Reagents for N-Glycan Detection and Enrichment

用于 N-聚糖检测和富集的工程泛特异性试剂

• 批准号: 10761111
• 负责人: Sheng-Cheng Wu
• 金额: $ 30.17万
• 依托单位: GLYCOSENSORS AND DIAGNOSTICS, LLC
• 依托单位国家: 美国
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-08-01 至 2025-01-31
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10761111
• 关键词: Address; Affinity; Affinity Chromatography; Antibodies; Antibody Response; Antigens; Asparagine; Bacteria; Binding; Binding Proteins; Biological; Biological Assay; Biological Markers; Biological Process; Carbohydrates; Cell Extracts; Cells; Complex; Computer Models; Detection; Development; Diagnostic Reagent Kits; Directed Molecular Evolution; Disease; Engineering; Enzyme-Linked Immunosorbent Assay; Enzymes; Escherichia coli; Expression Library; F Box Domain; FBXO2 gene; Family; Flow Cytometry; Glycopeptides; Glycoproteins; Immunohistochemistry; Infection; Lectin; Legal patent; Link; Malignant Neoplasms; Maps; Mass Spectrum Analysis; Mus; Mutate; Nature; Neurodegenerative Disorders; Peptides; Performance; Phase; Plant Lectins; Plant Resins; Play; Polysaccharides; Positioning Attribute; Procedures; Production; Property; Protein Family; Protein Subunits; Proteins; Protocols documentation; Reagent; Recombinants; Research; Role; Sampling; Serum; Site; Specificity; Structural Models; Structure; Techniques; Technology; Variant; Western Blotting; Yeasts; advanced analytics; carbohydrate binding protein; carbohydrate receptor; design; glycoproteomics; glycosylation; improved; instrumentation; manufacturing scale-up; novel; preference; scale up; screening; sugar; targeted biomarker; tool; ubiquitin ligase; ubiquitin-protein ligase

PROJECT SUMMARY Glycans play crucial roles in nearly every aspect of biological processes, and their distinct properties make them appealing as disease biomarker targets. However, due to their highly branched and variably linked nature, glycans pose a challenge for detection, purification, and structural analysis. Although advanced analytical techniques and instrumentation have been developed that target glycans, there is still a great need for reagents with well-defined carbohydrate specificity and high affinity that can be used to independently interrogate or enrich carbohydrate samples prior to traditional analyses. Lectenz Bio has been engineering glycan-processing enzymes and glycan-binding proteins into high-affinity glycan-specific reagents with tunable properties. The Fbs1 component of the E3 ubiquitin ligase complex recognizes glycans as part of its biological role in ubiquitylation. It is therefore a promising protein for conversion into a binding reagent for asparagine-linked glycans (N-glycans), which we will achieve by employing computational modeling and directed evolution. Initial studies demonstrate that Fbs1 can be readily expressed in E. coli, and binds specifically to N-glycosylated peptides and proteins, and not to the corresponding non-glycosylated peptides and proteins. However, it does demonstrate a preference for certain N-glycan structures. A pan-specific N-glycan binding reagent would directly address the urgent need to tools to help detect glyco- biomarkers and could immediately benefit the field of glycomics/glycoproteomics by enabling sample pre- enrichment. After engineering and optimizing the production of recombinant Fbs1 and its engineered variants, Lectenz Bio will develop a suite of kits for its application in Western blotting, immunohistochemistry, ELISA, flow cytometry, and affinity chromatography.

项目摘要 聚糖几乎在生物过程的各个方面都扮演着至关重要的角色，它们的独特特性使得 它们作为疾病生物标志物靶标有吸引力。但是，由于它们的分支高分和可变的链接 自然，聚糖对检测，纯化和结构分析构成了挑战。虽然先进 已经开发了针对聚糖的分析技术和仪器，仍然有很大的需求 对于定义明确的碳水化合物特异性和高亲和力的试剂，可用于独立 在进行传统分析之前，请询问或富集碳水化合物样品。 Lectenz Bio一直在设计聚糖处理酶和聚糖结合蛋白成高亲和力 具有可调特性的聚糖特异性试剂。 E3泛素连接酶配合物的FBS1成分 将聚糖视为其在泛素化中生物学作用的一部分。因此，它是一种有希望的蛋白质 转化为白天连接聚糖（N-聚糖）的结合试剂，我们将通过它来实现 采用计算建模和定向进化。最初的研究表明，FBS1很容易 在大肠杆菌中表达，并特别结合N-糖基化的肽和蛋白质，而不是 相应的非糖基化肽和蛋白质。但是，它确实表明了对某些人的偏爱 N-聚糖结构。 泛特异性的N-聚糖结合试剂将直接解决迫切需要的工具，以帮助检测聚糖 - 生物标志物，可以立即通过使样品预先实现样品来使糖/糖蛋白质组学领域受益 丰富。在工程和优化重组FBS1及其工程变体的生产之后， Lectenz Bio将开发一套套件，用于将其用于蛋白质印迹，免疫组织化学，ELISA，ELISA， 流式细胞仪和亲和色谱。