The evolution of UDP-glycosyl/glucuronosyltransferase 1E (UGT1E) genes in bird lineages is linked to feeding habits but UGT2 genes is not.

The evolution of UDP-glycosyl/glucuronosyltransferase 1E (UGT1E) genes in bird lineages is linked to feeding habits but UGT2 genes is not.
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DOI:
10.1371/journal.pone.0205266
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发表时间:
2018
期刊:
影响因子:
3.7
通讯作者:
Kubota A
Kubota A
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kawai YK;Ikenaka Y;Ishizuka M;Kubota A

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UDP-糖基转移酶(UGT)催化糖基的转移(例如,葡萄糖醛酸)与外源性或内源性化学物质结合,并在缀合反应中起重要作用。在脊椎动物中,UGT基因分为5个家族:UGT 1、UGT 2、UGT 3、UGT 5和UGT 8。在这些UGT酶中,已知UGT 1和UGT 2酶是哺乳动物中重要的异生物质代谢酶。然而,对鸟类中的UGT 1和UGT 2基因知之甚少。因此,在这项研究中,我们的目的是分类禽UGT 1和UGT 2基因的基础上,它们的进化关系。我们还研究了UGT分子进化和生态因素之间的关联,特别是食性,栖息地和迁移。通过对43种不同生态的鸟类基因组的分析,我们发现鸟类UGT 1 E基因可分为6类,UGT 2基因可分为3类。UGT基因数与生态因子的相关性表明,UGT 1 E基因在肉食性物种中的数量正在减少。选择压力的估计也支持这样的假设,即饮食影响鸟类UGT 1 E基因的进化,类似于哺乳动物UGT 1A和UGT 2B基因。
UDP-glycosyltransferase (UGT) catalyzes the transfer of glycosyl groups (e.g., glucuronic acid) to exogenous or endogenous chemicals and plays an important role in conjugation reactions. In vertebrates, UGT genes are divided into 5 families: UGT1, UGT2, UGT3, UGT5, and UGT8. Among these UGT enzymes, UGT1 and UGT2 enzymes are known to be important xenobiotic metabolizing enzymes in mammals. However, little is known about UGT1 and UGT2 genes in avian species. In this study, we therefore aimed to classify avian UGT1 and UGT2 genes based on their evolutionary relationships. We also investigated the association between UGT molecular evolution and ecological factors, specifically feeding habits, habitat, and migration. By examining the genomes of 43 avian species with differing ecology, we showed that avian UGT1E genes are divided into 6 groups and UGT2 genes into 3 groups. Correlations between UGT gene count and ecological factors suggested that the number of UGT1E genes is decreasing in carnivorous species. Estimates of selection pressure also support the hypothesis that diet influenced avian UGT1E gene evolution, similar to mammalian UGT1A and UGT2B genes.
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