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学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-05-10 |
| タイトル |
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タイトル |
Soft X-ray Tomography Enables New Insights into the Coordinated Division of Organelle-like Symbiont in a Globally Distributed Unicellular Marine Haptophyte Alga |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Turk-Kubo, Kendra A
Loconte, Valentina
Vanslembrouck, Bieke
Wing Kwan Esther Mak
Ekman, Axel
Chen, Jian-Hua
タカノ, ヨシヒト
ホリグチ, タケオ
西村, 朋宏
アダチ, マサオ
Le Gros, Mark
ハギノ, キョウコ
P Zehr, Jonathan
Larabell, Carolyn
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Symbiotic interactions between unicellular microbes were key to evolution of eukaryotes because they led to the evolution of organelles such as the chloroplast and mitochondria [1]. Nitrogen (N2) fixation is a key metabolic process on Earth, carried out exclusively by microbes that often form symbiotic partnerships with diverse hosts. Despite many of these interactions being endosymbiotic, N2 fixation has never been associated with any extant organelle. A genomically reduced cyanobacterium called UCYN-A is a N2-fixing endosymbiont (spheroid body) of a marine unicellular haptophyte, Braarudosphaera bigelowii, and supplies fixed nitrogen to the host in return for fixed carbon [2]. This symbiosis is particularly intriguing because it appears to be an obligate endosymbiosis similar to the hypothetical “nitroplast”, evidenced by extreme genome and metabolic reduction in the UCYN-A cyanobacterium. The UCYN-A symbiosis provides a unique model system for understanding the basic mechanisms of organellogenesis (the evolution of an organelle from an endosymbiont), cellular coordination of growth of unicellular symbiotic partners, and how symbiosis enables aerobic N2 fixation. Key to maintaining endosymbionts and organelles is coordinated cell growth and division, yet nothing was known about how N2-fixing spheroid bodies divide with their host cells. To explore the role of the endosymbiont in the host division, we employed soft X-ray tomography (SXT) [3]. The technique indicated a tight coordination of the cell division with the endosymbiont and optimized localization of host cell’s organelles interacting with the UCYN-A spheroid body. Application of SXT to this unusual symbiosis between two single-celled organisms affirms coordinated structural reorganization between the two organisms to maintain the N2-fixing function of the spheroid body. These findings are significant for understanding symbiotic N2 fixation and organellogenesis [5]. |
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言語 |
en |
| 書誌情報 |
en : Microscopy and Microanalysis
巻 29,
発行日 2023-07-22
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| 出版者 |
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出版者 |
Oxford University Press |
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言語 |
en |
| ISSN |
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収録物識別子タイプ |
PISSN |
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収録物識別子 |
1431-9276 |
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収録物識別子タイプ |
EISSN |
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収録物識別子 |
1435-8115 |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
DOI |
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関連識別子 |
10.1093/micmic/ozad067.596 |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
Local |
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関連識別子 |
23343054 |
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言語 |
ja |
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関連名称 |
水産技術研究所 環境・応用部門 環境保全部 （廿日市） |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
URI |
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関連識別子 |
https://academic.oup.com/mam/article/29/Supplement_1/1165/7228668 |
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言語 |
en |
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関連名称 |
OXFORD ACADEMIC : Microscopy and Microanalysis |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
Turk-Kubo et al. Soft X-ray tomography enables new insights.pdf (288 KB)
