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Bathophenanthrolinedisulfonic acid disodium salt hydrate

二氢菲啶二磺酸二钠盐水合物

Company: Sigma-Aldrich
Catalog#: B1375
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59Fe Uptake Assays in Paracoccidioides Species
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2016-09-20
[Abstract]  Iron is an essential micronutrient required for virtually all organisms. This fact is related to the ability of the transition metal to exist in two oxidation states, the reduced ferrous (Fe2+) and the oxidized ferric (Fe3+). Given the relative availability of aqueous iron (the element which constitutes ~5% of the earth’s crust) one is not surprised that iron is the most common prosthetic element in biology. Usually, fungi can uptake iron through receptor-mediated internalization of a siderophore or heme, and/or reductive iron assimilation (RIA) (Kosman, 2013). In this way, the uptake of iron in the absence or presence of the reducing agent ascorbic acid can be investigated by 59Fe uptake assays, as previously described (Eide et al., 1992). In the ... [摘要]  铁是几乎所有生物体所必需的微量营养素。这一事实涉及过渡金属以两种氧化态存在的能力,即还原的亚铁(Fe 2+)和氧化的铁(Fe 3++)。考虑到铁水(构成地壳的〜5%的元素)的相对可用性,人们不惊讶的是,铁是生物学中最常见的假体元素。通常,真菌可以通过受体介导的铁载体或血红素的内化,和/或还原铁同化(RIA)吸收铁(Kosman,2013)。以这种方式,如上所述,可以通过59 Fe吸收测定来研究在还原剂抗坏血酸存在或不存在下铁的吸收(Eide等人)。 ,1992)。在抗坏血酸存在下,研究还原非依赖性59 Fe吸收途径。另一方面,在不存在抗坏血酸的情况下,刺激还原依赖性59 Fe吸收途径。使用这种策略用于人类致病真菌Paracoccidioides物种,结果表明,在没有抗坏血酸的情况下,通过 01的铁摄取是低的,不同于在 > Pb 18。这些结果表明,只有在Fe 18中,铁摄取路径与铁还原酶偶联(Bailão等人,2015)。在该方案中,我们描述了如何在Paracoccidioides物种中进行 59 Fe摄取测定。

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