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Adaptive evolution of antioxidase-related genes in hypoxia-tolerant mammals
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.
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Evolved resistance to hypoxia has also been essential for mammals that have transitioned to subterranean or high altitude environments.
“However, evolved resistance to hypoxia has also been essential for mammals that have transitioned to subterranean or high altitude environments, where oxygen availability is also limited (Wang et al. 2024) (Fig. 1).”
From From Trees to Traits: A Review of Advances in PhyloG2P Methods and Future Directions (2025) · cites this paper as Wang et al. 2024
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Sorted by citations
From Trees to Traits: A Review of Advances in PhyloG2P Methods and Future Directions
Macdonald, A. R., James, M. E., Mitchell, J. D., & Holland, B. R. (2025) · Genome Biology and Evolution · doi:10.1093/gbe/evaf150 · Cited by 5
Metadata
- Authors
- Wang, Q.-P., Luo, C.-Y., Xu, X.-H., Hu, W.-X., Gai, Y.-L., Gong, Y.-J., & Mu, Y.
- Venue
- Frontiers in Genetics
- Publisher
- Frontiers Media SA
- Published
- 2024-04-25
- Volume
- 15
- ISSN
- 1664-8021
- PMC
- PMC11079137
- Cited by
- 7
- References
- 0
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