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SDS

SDS(​​十二烷基硫酸钠)

Company: Bio-Rad Laboratories
Catalog#: 1610301
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[2-3H]Mannose-labeling and Analysis of N-linked Oligosaccharides
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Date:
2017-07-20
[Abstract]  Modifications of N-linked oligosaccharides of glycoproteins soon after their biosynthesis correlate to glycoprotein folding status. These alterations can be detected in a sensitive way by pulse-chase analysis of [2-3H]mannose-labeled glycoproteins, with enzymatic removal of labeled N-glycans, separation according to size by HPLC and radioactive detection in a scintillation counter. [摘要]  其生物合成后不久,糖蛋白的N-连接寡糖的修饰与糖蛋白折叠状态相关。 可以通过脉冲追踪分析[2- 3 H]甘露糖标记的糖蛋白,通过酶切除标记的N-聚糖来检测这些变化,根据大小通过HPLC分离和放射性 在闪烁计数器中检测。
【背景】在将新生多肽进入ER后,进行若干翻译后修饰,这对于折叠,成熟和质量控制过程至关重要。加入核糖寡糖Glc 3 N 3 GlcNAc 2以产生N-连接的糖蛋白是非常常见的修饰,首先发生(Benyair等人,2011)。前体N-聚糖的加工通过在早期分泌室(Tannous等人,2015)中创建识别标签来引导糖蛋白成熟和质量控制机制。在后期阶段,在整个分泌途径中,寡糖的核心作为将糖链扩展成复合聚糖的平台,其结构涉及糖蛋白的运输和功能(Kamiya等人, ,2012)。由于早期N-连接的聚糖修饰反映糖蛋白生物合成和质量控制,寡糖加工已成为许多研究的主题(Avezov等人,2010; Hosokawa等人。,2010; Ninagawa等人,2014; Ogen-Shtern等人,2016)。糖蛋白组学方法大大改善了N-聚糖的表征,但它们不允许研究早期分泌途径中聚糖加工的动力学。
 这里我们描述一种用于分离和分析代谢标记的N-连接寡糖的简化脉冲追踪方法。该方法包括通过[2- H] ...

Semi-denaturing Detergent Agarose Gel Electrophoresis (SDD-AGE)
Author:
Date:
2014-11-20
[Abstract]  Pathological proteins in neurodegenerative diseases suffer a conformational change to a misfolded amyloid state. Such pathological event leads to the aggregation of these proteins that indefinitely propagates as an altered form of itself, and harbor prion-like properties (Wickner, 1994; Prusiner, 2012). In addition to diseases, prions can also have beneficial adaptive roles in lower eukaryotes (in fungi and yeast) (Eaglestone et al., 1999; True et al., 2004; Coustou et al., 1999). Besides separating polymers from their precursor soluble monomers, another particular difficulty of the study of amyloid proteins is to resolve the heterogeneity of the aggregates, since these usually exhibit a variable degree of polymorphism. Semi-denaturating detergent agarose gel ... [摘要]  神经退行性疾病中的病理蛋白质遭受错误折叠的淀粉样蛋白状态的构象变化。这种病理性事件导致这些蛋白质的聚集,其作为其自身的改变形式无限地繁殖,并且具有朊病毒样特性(Wickner,1994; Prusiner,2012)。除了疾病,朊病毒还可以在低等真核生物(真菌和酵母)中具有有益的适应性作用(Eaglestone等人,1999; True等人,2004; Coustou等人,1999)。除了从其前体可溶性单体中分离聚合物之外,研究淀粉样蛋白的另一个特别困难是解决聚集体的异质性,因为这些通常表现出不同程度的多态性。半变性洗涤剂琼脂糖凝胶电泳(SDD-AGE)是一种利用朊病毒和朊病毒样聚合物的性质来高度抵抗SDS洗涤剂的溶解的技术,以及琼脂糖的大孔径,其允许分辨率的高分子量复合物。在该方法中,我们详细描述了该技术如何用于表征细菌和酵母中的异质聚集(Gasset-Rosa等人,2014; Molina-García和Giraldo,2014)应用于研究通过遗传操作变得易于聚集的蛋白质的聚集模式。

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