Gene duplication and functional divergence of new genes contributed to the polar acclimation of Antarctic green algae
© Ocean University of China 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law..
Psychrophilic microalgae successfully survive in the extreme and highly variable polar ecosystems, which represent the energy base of most food webs and play a fundamental role in nutrient cycling. The success of microalgae is rooted in their adaptive evolution. Revealing how they have evolved to thrive in extreme polar environments will help us better understand the origin of life in polar ecosystems. We isolated a psychrophilic unicellular green alga, Microglena sp. YARC, from Antarctic sea ice which has a huge genome. Therefore, we predicted that gene replication may play an important role in its polar adaptive evolution. We found that its protein-coding gene number significantly increased and the duplication time was dated between 37 and 48 million years ago, which is consistent with the formation of the circumpolar Southern Ocean. Most duplicated paralogous genes were enriched in pathways related to photosynthesis, DNA repair, and fatty acid metabolism. Moreover, there were a total of 657 Microglena-specific families, including collagen-like proteins. The divergence in the expression patterns of the duplicated and species-specific genes reflects sub- and neo-functionalization during stress acclimation. Overall, key findings from this study provide new information on how gene duplication and their functional novelty contributed to polar algae adaptation to the highly variable polar environmental conditions.
Supplementary Information: The online version contains supplementary material available at 10.1007/s42995-023-00203-z.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:5 |
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| Enthalten in: |
Marine life science & technology - 5(2023), 4 vom: 21. Nov., Seite 511-524 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhang, Xiaowen [VerfasserIn] |
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| Links: |
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| Themen: |
Adaptive evolution |
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| Anmerkungen: |
Date Revised 05.12.2023 published: Electronic-eCollection Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1007/s42995-023-00203-z |
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| Förderinstitution / Projekttitel: |
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| 520 | |a Psychrophilic microalgae successfully survive in the extreme and highly variable polar ecosystems, which represent the energy base of most food webs and play a fundamental role in nutrient cycling. The success of microalgae is rooted in their adaptive evolution. Revealing how they have evolved to thrive in extreme polar environments will help us better understand the origin of life in polar ecosystems. We isolated a psychrophilic unicellular green alga, Microglena sp. YARC, from Antarctic sea ice which has a huge genome. Therefore, we predicted that gene replication may play an important role in its polar adaptive evolution. We found that its protein-coding gene number significantly increased and the duplication time was dated between 37 and 48 million years ago, which is consistent with the formation of the circumpolar Southern Ocean. Most duplicated paralogous genes were enriched in pathways related to photosynthesis, DNA repair, and fatty acid metabolism. Moreover, there were a total of 657 Microglena-specific families, including collagen-like proteins. The divergence in the expression patterns of the duplicated and species-specific genes reflects sub- and neo-functionalization during stress acclimation. Overall, key findings from this study provide new information on how gene duplication and their functional novelty contributed to polar algae adaptation to the highly variable polar environmental conditions | ||
| 520 | |a Supplementary Information: The online version contains supplementary material available at 10.1007/s42995-023-00203-z | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Adaptive evolution | |
| 650 | 4 | |a Gene replication | |
| 650 | 4 | |a Psychrophilic microalgae | |
| 700 | 1 | |a Han, Wentao |e verfasserin |4 aut | |
| 700 | 1 | |a Fan, Xiao |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Yitao |e verfasserin |4 aut | |
| 700 | 1 | |a Xu, Dong |e verfasserin |4 aut | |
| 700 | 1 | |a Sun, Ke |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Wei |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Yan |e verfasserin |4 aut | |
| 700 | 1 | |a Ma, Jian |e verfasserin |4 aut | |
| 700 | 1 | |a Ye, Naihao |e verfasserin |4 aut | |
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