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Quinone reductase activity is widespread in lichens
The Lichenologist ( IF 1.4 ) Pub Date : 2021-05-26 , DOI: 10.1017/s0024282921000190
Calvin Eddington Moyo , Farida Minibayeva , Christiane Liers , Richard Peter Beckett

In our earlier work, we demonstrated that the oxidases tyrosinase (TYR), laccase (LAC), and a heme peroxidase (POX) occur widely in lichens. Here we report on the occurrence of another oxidoreductase enzyme, quinone reductase (QR) (EC 1.6.5.5). While QR has been reported to occur widely in other organisms, there is currently no information on QR activities in lichens. Here we present a survey of QR activity in 14 species of lichens. Results demonstrate that QR activity is readily detectable in all lichen species tested. However, activities vary greatly, with ‘jelly’ lichens in the genera Collema and Leptogium having the highest activities. QR, LAC and POX are all believed to have a role in extracellular hydroxyl radical production. However, in this study no correlation was found between the activities of these enzymes and the rates at which hydroxyl radicals were produced. Possible roles for QR in lichen biology are discussed.

中文翻译:

醌还原酶活性在地衣中广泛存在

在我们早期的工作中,我们证明了氧化酶酪氨酸酶 (TYR)、漆酶 (LAC) 和血红素过氧化物酶 (POX) 在地衣中广泛存在。在这里,我们报告了另一种氧化还原酶,醌还原酶 (QR) (EC 1.6.5.5) 的发生。虽然据报道 QR 广泛存在于其他生物体中,但目前没有关于地衣中 QR 活动的信息。在这里,我们对 14 种地衣的 QR 活动进行了调查。结果表明,QR 活动在所有测试的地衣物种中很容易检测到。然而,活动差异很大,“果冻”地衣属科莱马细部有最高的活动。QR、LAC 和 POX 都被认为在细胞外羟基自由基的产生中起作用。然而,在这项研究中,没有发现这些酶的活性与产生羟基自由基的速率之间存在相关性。讨论了 QR 在地衣生物学中的可能作用。
更新日期:2021-05-26
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