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Zinc acetate dihydrate

Company: EMD Millipore
Catalog#: 108802
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The Sulfur Oxygenase Reductase Activity Assay: Catalyzing a Reaction with Elemental Sulfur as Substrate at High Temperatures
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2017-07-20
[Abstract]  The sulfur oxygenase reductase (SOR) reaction is a dioxygen-dependent disproportionation of elemental sulfur (S0), catalyzed at optimal temperatures between 65 °C and 85 °C. Thiosulfate and sulfite are formed as oxidized products as well hydrogen sulfide as reduced product. External co-factors are not required. Usually, the SOR assay is performed in a milliliter scale in S0-containing Tris-buffer at high temperatures followed by colorimetric product quantification. In order to make the SOR assay more sensitive and better reproducible, several modifications were implemented compared to the original SOR assay (Kletzin, 1989). Here we present the modified SOR assay and the following quantification of the reaction products. [摘要]  硫加氧酶还原酶(SOR)反应是元素硫的二氧依赖性歧化(S 0 ),在65℃至85℃之间的最佳温度下催化。 硫代硫酸盐和亚硫酸盐作为还原产物形成氧化产物以及硫化氢。 不需要外部辅助因素。 通常,SOR测定在高温下以含有S 0含有Tris缓冲液的毫升标度进行,随后进行比色产物定量。 为了使SOR测定更灵敏和更好的再现性,与原始SOR测定相比,实施了几个修改(Kletzin,1989)。 在这里,我们提供修饰的SOR测定和以下反应产物的定量。
【背景】硫氧化酶还原酶(SOR)催化与亚硫酸盐,硫代硫酸盐和硫化氢作为可检测产物的元素硫的二氧依赖性歧化。最初发现的SOR来自超嗜热,硫氧化古菌和细菌。报道的温度最佳值在65℃和85℃之间,pH值在pH5和pH7.4之间是最佳的(Emmel等人,1986; Kletzin,1989; Sun等人, ,2003; Pelletier等人,2008)。令人惊讶的是,源自嗜温细菌的新生儿烟草属(SOUTH)等(2012)的嗜碱性细菌和碱性嗜碱性硫代弧菌悖论的SORs(Rühlet al。还有在pH8.4和pH9.0下分别具有约80℃的温度最佳值。大多数SOR可以在E中生产。大肠杆菌通过异源基因表达,并且只有该酶的第一个描述源自从其天然来源纯化的蛋白质(Emmel等人,1986; Kletzin,1989; Pelletier et al。 ...

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