In:
Frontiers in Genetics, Frontiers Media SA, Vol. 15 ( 2024-4-25)
Abstract:
To cope with the damage from oxidative stress caused by hypoxia, mammals have evolved a series of physiological and biochemical traits, including antioxidant ability. Although numerous research studies about the mechanisms of hypoxia evolution have been reported, the molecular mechanisms of antioxidase-related genes in mammals living in different environments are yet to be completely understood. In this study, we constructed a dataset comprising 7 antioxidase-related genes ( CAT , SOD1 , SOD2 , SOD3 , GPX1 , GPX2 , and GPX3 ) from 43 mammalian species to implement evolutionary analysis. The results showed that six genes ( CAT , SOD1 , SOD2 , SOD3 , GPX1 , and GPX3 ) have undergone divergent evolution based on the free-ratio (M1) model. Furthermore, multi-ratio model analyses uncovered the divergent evolution between hypoxic and non-hypoxic lineages, as well as various hypoxic lineages. In addition, the branch-site model identified 9 positively selected branches in 6 genes ( CAT , SOD1 , SOD2 , SOD3 , GPX2 , and GPX3 ) that contained 35 positively selected sites, among which 31 positively selected sites were identified in hypoxia-tolerant branches, accounting for 89% of the total number of positively selected sites. Interestingly, 65 parallel/convergent sites were identified in the 7 genes. In summary, antioxidase-related genes are subjected to different selective pressures among hypoxia-tolerant species living in different habitats. This study provides a valuable insight into the molecular evolution of antioxidase-related genes in hypoxia evolution in mammals.
Type of Medium:
Online Resource
ISSN:
1664-8021
DOI:
10.3389/fgene.2024.1315677
DOI:
10.3389/fgene.2024.1315677.s001
DOI:
10.3389/fgene.2024.1315677.s002
DOI:
10.3389/fgene.2024.1315677.s003
DOI:
10.3389/fgene.2024.1315677.s004
DOI:
10.3389/fgene.2024.1315677.s005
DOI:
10.3389/fgene.2024.1315677.s006
DOI:
10.3389/fgene.2024.1315677.s007
DOI:
10.3389/fgene.2024.1315677.s008
DOI:
10.3389/fgene.2024.1315677.s009
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2024
detail.hit.zdb_id:
2606823-0
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