Nitrogen-fixing organelle in a marine alga
Symbiotic interactions were key to the evolution of chloroplast and mitochondria organelles, which mediate carbon and energy metabolism in eukaryotes. Biological nitrogen fixation, the reduction of abundant atmospheric nitrogen gas (N2) to biologically available ammonia, is a key metabolic process performed exclusively by prokaryotes. Candidatus Atelocyanobacterium thalassa, or UCYN-A, is a metabolically streamlined N2-fixing cyanobacterium previously reported to be an endosymbiont of a marine unicellular alga. Here we show that UCYN-A has been tightly integrated into algal cell architecture and organellar division and that it imports proteins encoded by the algal genome. These are characteristics of organelles and show that UCYN-A has evolved beyond endosymbiosis and functions as an early evolutionary stage N2-fixing organelle, or "nitroplast.".
| Errataetall: |
CommentIn: Science. 2024 Apr 12;384(6692):160-161. - PMID 38603513 |
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| Medienart: |
E-Artikel |
| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:384 |
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| Enthalten in: |
Science (New York, N.Y.) - 384(2024), 6692 vom: 12. Apr., Seite 217-222 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Coale, Tyler H [VerfasserIn] |
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Date Completed 15.04.2024 Date Revised 19.04.2024 published: Print-Electronic CommentIn: Science. 2024 Apr 12;384(6692):160-161. - PMID 38603513 Citation Status MEDLINE |
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| doi: |
10.1126/science.adk1075 |
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NLM370928253 |
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| 520 | |a Symbiotic interactions were key to the evolution of chloroplast and mitochondria organelles, which mediate carbon and energy metabolism in eukaryotes. Biological nitrogen fixation, the reduction of abundant atmospheric nitrogen gas (N2) to biologically available ammonia, is a key metabolic process performed exclusively by prokaryotes. Candidatus Atelocyanobacterium thalassa, or UCYN-A, is a metabolically streamlined N2-fixing cyanobacterium previously reported to be an endosymbiont of a marine unicellular alga. Here we show that UCYN-A has been tightly integrated into algal cell architecture and organellar division and that it imports proteins encoded by the algal genome. These are characteristics of organelles and show that UCYN-A has evolved beyond endosymbiosis and functions as an early evolutionary stage N2-fixing organelle, or "nitroplast." | ||
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| 700 | 1 | |a Vanslembrouck, Bieke |e verfasserin |4 aut | |
| 700 | 1 | |a Mak, Wing Kwan Esther |e verfasserin |4 aut | |
| 700 | 1 | |a Cheung, Shunyan |e verfasserin |4 aut | |
| 700 | 1 | |a Ekman, Axel |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Jian-Hua |e verfasserin |4 aut | |
| 700 | 1 | |a Hagino, Kyoko |e verfasserin |4 aut | |
| 700 | 1 | |a Takano, Yoshihito |e verfasserin |4 aut | |
| 700 | 1 | |a Nishimura, Tomohiro |e verfasserin |4 aut | |
| 700 | 1 | |a Adachi, Masao |e verfasserin |4 aut | |
| 700 | 1 | |a Le Gros, Mark |e verfasserin |4 aut | |
| 700 | 1 | |a Larabell, Carolyn |e verfasserin |4 aut | |
| 700 | 1 | |a Zehr, Jonathan P |e verfasserin |4 aut | |
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