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WIDE-VIEW TM Prestained Protein Size Marker Ⅲ

WIDE-VIEW TM预染蛋白大小标记物

Company: Wako Pure Chemical Industries
Catalog#: 230-02461
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Phos-tag Immunoblot Analysis for Detecting IRF5 Phosphorylation
Author:
Date:
2017-05-20
[Abstract]  While the activation of the transcription factor interferon regulatory factor 5 (IRF5) is critical for the induction of innate immune responses, it also contributes to the pathogenesis of the autoimmune disease systemic lupus erythematosus (SLE). IRF5 phosphorylation is a hallmark of its activation in the Toll-like receptor (TLR) pathway, where active IRF5 induces type I interferon and proinflammatory cytokine genes. By using the phosphate-binding molecule Phos-tag, without either radioisotopes or phospho-specific antibodies, the protocol described here enables detection of the phosphorylation of both human and murine IRF5, as well as that of other proteins. [摘要]  虽然转录因子干扰素调节因子5(IRF5)的激活对于诱导先天免疫应答至关重要,但也有助于自身免疫疾病系统性红斑狼疮(SLE)的发病机制。 IRF5磷酸化是其在Toll样受体(TLR)途径中的活化的标志,其中活性IRF5诱导I型干扰素和促炎细胞因子基因。通过使用不含放射性同位素或磷酸特异性抗体的磷酸结合分子磷酸标签,本文所述的方案可以检测人和鼠IRF5以及其他蛋白质的磷酸化。

背景 在TLR-MyD88途径中,IRF5通过翻译后修饰如泛素化和磷酸化被激活,然后活性IRF5转位到细胞核中并诱导其靶基因(Takaoka等人,2005; Balkhi ,2008; Tamura等人,2008; Hayden and Ghosh,2014)。关于IRF5在SLE中的激活状态,已经报道了IRF5积累在SLE患者的单核细胞核中(Stone等人,2012)。此外,我们最近在SLE鼠模型中显示,IRF5超激活(例如,升高的磷酸化)导致SLE样疾病的发展(Ban 等人,,2016年)。因此,分析IRF5的激活状态对于研究SLE以及先天免疫应答是重要的。磷酸化是IRF5激活的核心,因为许多研究已经通过定点诱变和/或质谱法揭示了IRF5的功能性磷酸化位点(Barnes等人,2002; Lin et al。等人,2005; ...

Phosphatase Protection Assay: 14-3-3 Binding Protects the Phosphate group of RSG from λ Protein Phosphatase
Author:
Date:
2015-02-05
[Abstract]  14-3-3 proteins regulate diverse cellular processes in eukaryotes by binding to phospho-serine or threonine of target proteins. One of the physiological functions of 14-3-3 is to bind and protect phosphate groups of the target proteins against phosphatases. REPRESSION OF SHOOT GROWTH (RSG) is a tobacco (Nicotiana tabacum) transcription factor that is involved in the feedback regulation of biosynthetic genes of plant hormone gibberellin. 14-3-3 binds to phospho-Ser-114 in RSG. Ca2+-dependent protein kinase NtCDPK1 was identified as a kinase that phosphorylates Ser-114 of RSG. Our recent study revealed that NtCDPK1 forms a heterotrimer with RSG and 14-3-3 and that 14-3-3 was transferred from NtCDPK1 to phosphorylated RSG (Ito et al., 2014). In the course of the ... [摘要]  14-3-3蛋白通过结合靶蛋白的磷酸 - 丝氨酸或苏氨酸来调节真核生物中的多种细胞过程。 14-3-3的生理功能之一是结合和保护靶蛋白的磷酸基团免受磷酸酶。生长生长的表达(RSG)是涉及植物激素赤霉素的生物合成基因的反馈调节的烟草(烟草属)转录因子。 14-3-3结合RSG中的磷酸-Ser-114。 Ca 2+ - 依赖性蛋白激酶NtCDPK1被鉴定为磷酸化RSG的Ser-114的激酶。我们最近的研究揭示NtCDPK1与RSG和14-3-3形成异源三聚体,并且14-3-3从NtCDPK1转移到磷酸化RSG(Ito等人,2014)。在研究过程中,我们发现14-3-3在体外保护RSG的磷酸基团免受λ蛋白磷酸酶的影响。在这里,我们描述了体外磷酸酶保护测定的协议。为了检测蛋白质的磷酸化状态,我们使用Phos-tag SDS-PAGE和放射自显影。该方案可以适用于磷酸蛋白结合蛋白是否保护靶蛋白的磷酸基团免于磷酸酶的检查,尽管蛋白激酶可能是靶蛋白磷酸化所需的。

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