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FisherbrandTM Low-Retention Microcentrifuge Tubes

硅化低保留微量离心管

Company: Fisher Scientific
Catalog#: 02-681-320
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Two Different Methods of Quantification of Oxidized Nicotinamide Adenine Dinucleotide (NAD+) and Reduced Nicotinamide Adenine Dinucleotide (NADH) Intracellular Levels: Enzymatic Coupled Cycling Assay and Ultra-performance Liquid Chromatography (UPLC)-Mass Spectrometry
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Date:
2018-07-20
[Abstract]  Current studies on the age-related development of metabolic dysfunction and frailty are each day in more evidence. It is known, as aging progresses, nicotinamide adenine dinucleotide (NAD+) levels decrease in an expected physiological process. Recent studies have shown that a reduction in NAD+ is a key factor for the development of age-associated metabolic decline. Increased NAD+ levels in vivo results in activation of pro-longevity and health span-related factors. Also, it improves several physiological and metabolic parameters of aging, including muscle function, exercise capacity, glucose tolerance, and cardiac function in mouse models of natural and accelerated aging.

Given the importance of monitoring cellular NAD+ and ...
[摘要]  目前关于代谢功能障碍和虚弱的年龄相关发展的研究每天都有更多的证据。众所周知,随着衰老的进展,烟酰胺腺嘌呤二核苷酸(NAD + )水平在预期的生理过程中降低。最近的研究表明,NAD + 的减少是与年龄相关的代谢衰退发展的关键因素。增加NAD + 水平体内导致激活寿命和健康跨度相关因素。此外,它改善了老化的几个生理和代谢参数,包括自然和加速老化的小鼠模型中的肌肉功能,运动能力,葡萄糖耐量和心脏功能。

鉴于监测细胞NAD + 和NADH水平的重要性,有一个值得信赖的方法是至关重要的。该方案的目的是在有效且广泛适用的测定中描述来自组织和细胞的NAD + 和NADH提取以及其图形和定量分析。

【背景】氧化烟酰胺腺嘌呤二核苷酸和还原型烟酰胺腺嘌呤二核苷酸(NAD + 和NADH)是重要的生物辅助因子,它们在几种合成代谢和分解代谢功能中提供和接受电子。它们参与诸如糖酵解,三羧酸循环和氧化磷酸化的反应。此外,它还作为DNA损伤修复中涉及的几种酶的底物,例如sirtuins和poly(ADP-核糖)聚合酶(PARP)(Imai和Guarente,2014; Verdin,2015; Yoshino et al。 ,2018)。

NAD + ...

In vitro Analysis of Ubiquitin-like Protein Modification in Archaea
Author:
Date:
2018-05-20
[Abstract]  The ubiquitin-like (Ubl) protein is widely distributed in Archaea and involved in many cellular pathways. A well-established method to reconstitute archaeal Ubl protein conjugation in vitro is important to better understand the process of archaeal Ubl protein modification. This protocol describes the in vitro reconstitution of Ubl protein modification and following analysis of this modification in Haloferax volcanii, a halophilic archaeon serving as the model organism. [摘要]  泛素样(Ubl)蛋白广泛分布于古细菌中并参与许多细胞途径。 为了更好地理解古细菌Ub1蛋白质修饰的过程,重建体外古细菌Ubl蛋白质缀合物的完善方法是很重要的。 该协议描述了Ubl蛋白质修饰的体外重建以及在作为模型生物的嗜盐古细菌Haloferax volcanii 中对这种修饰进行分析。

【背景】泛素(Ub)与靶蛋白共价连接的过程被称为泛素化,其控制真核细胞中大量的细胞过程(Glickman和Ciechanover,2002; Komander和Rape,2012)。遍在蛋白化由一系列酶(包括Ub激活酶(E1),Ub结合酶(E2s)和Ub连接酶(E3s))催化。泛素化的体外重建是确定酶之间或E3与蛋白质底物之间特异性的有用测定法(Zhao等人,2012)。在古细菌中,Ubl蛋白SAMP采用Ub折叠,并且与E1样酶UbaA催化的蛋白靶标异肽连接[Maupin-Furlow,(2014)综述]。尽管E1同系物在古细菌中广泛存在,但基于一级序列比较,在大多数古细菌中未预测经典E2或E3酶。我们最近对Haloferax volcanii的研究表明甲硫氨酸亚砜还原酶A(MsrA)是Ubl蛋白质修饰(sampylation)与UbaA一起在体内温和的氧化条件下和< (体外)(fu="">

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