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Reagent bottles with screw GL 45
Company: Simax
Catalog#: 1632414321500
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A Highly Sensitive Anion Exchange Chromatography Method for Measuring cGAS Activity in vitro
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2018-10-20
[Abstract]  Cyclic GMP-AMP synthase (cGAS) is a pattern recognition receptor (PRR) that senses double stranded DNA (dsDNA) in the cytosol and this leads to the activation of stimulator of interferon genes (STING) via the secondary messenger 2’3’-cyclic GMP-AMP (2’3’-cGAMP). STING then recruits TANK binding kinase 1 (TBK-1) and this complex can phosphorylate and activate interferon regulatory factor 3 (IRF3) leading to the induction of type I interferons and other antiviral genes. The cGAS:DNA complex catalyzes the synthesis of 2’3’-cGAMP and the purpose of the protocol presented here is to measure the in vitro activity of purified cGAS in the presence of dsDNA. The protocol was developed to elucidate the relationship between dsDNA length and the level of cGAS activity. The method involves an in ... [摘要]  环状GMP-AMP合酶（cGAS）是一种模式识别受体（PRR），可以感知胞质溶胶中的双链DNA（dsDNA），并通过第二信使2'3'来激活干扰素基因刺激物（STING）。环GMP-AMP（2'3'-cGAMP）。然后STING募集TANK结合激酶1（TBK-1），该复合物可磷酸化并激活干扰素调节因子3（IRF3），导致I型干扰素和其他抗病毒基因的诱导。 cGAS：DNA复合物催化2'3'-cGAMP的合成，这里提出的方案的目的是测量在dsDNA存在下纯化的cGAS的体外>活性。开发该方案是为了阐明dsDNA长度与cGAS活性水平之间的关系。该方法涉及与低浓度cGAS和dsDNA的体外>反应，然后使用阴离子交换色谱法定量反应产物。当比较不同DNA片段激活cGAS的能力时，低浓度的cGAS和dsDNA以及该测定的高灵敏度是关键优势。

【背景】细胞胞质内存在双链DNA是DNA或逆转录病毒感染的潜在迹象。核苷酸转移酶cGAS作为感知细胞溶质dsDNA的模式识别受体起作用。 cGAS被dsDNA变构激活并催化ATP和GTP转化为环状二核苷酸2'3'-cGAMP（或简称cGAMP）（Ablasser et al。>，2013; Civril et al 。>，2013; Diner et al。>，2013; Gao et al。>，2013; ...

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