Structure of a photosystem II-FCPII supercomplex from a haptophyte reveals a distinct antenna organization
Abstract Haptophytes are unicellular algae that produce 30 to 50% of biomass in oceans. Among haptophytes, a subset named coccolithophores is characterized by calcified scales. Despite the importance of coccolithophores in global carbon fixation and CaCO3 production, their energy conversion system i...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-05-01
|
| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-59512-9 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850277840194371584 |
|---|---|
| author | Romain La Rocca Koji Kato Pi-Cheng Tsai Yoshiki Nakajima Fusamichi Akita Jian-Ren Shen |
| author_facet | Romain La Rocca Koji Kato Pi-Cheng Tsai Yoshiki Nakajima Fusamichi Akita Jian-Ren Shen |
| author_sort | Romain La Rocca |
| collection | DOAJ |
| description | Abstract Haptophytes are unicellular algae that produce 30 to 50% of biomass in oceans. Among haptophytes, a subset named coccolithophores is characterized by calcified scales. Despite the importance of coccolithophores in global carbon fixation and CaCO3 production, their energy conversion system is still poorly known. Here we report a cryo-electron microscopic structure of photosystem II (PSII)-fucoxanthin chlorophyll c-binding protein (FCPII) supercomplex from Chyrostila roscoffensis, a representative of coccolithophores. This complex has two sets of six dimeric and monomeric FCPIIs, with distinct orientations. Interfaces of both FCPII/FCPII and FCPII/core differ from previously reported. We also determine the sequence of Psb36, a subunit previously found in diatoms and red algae. The principal excitation energy transfer (EET) pathways involve mainly 5 FCPIIs, where one FCPII monomer mediates EET to CP47. Our findings provide a solid structural basis for EET and energy dissipation pathways occurring in coccolithophores. |
| format | Article |
| id | doaj-art-d0e57783b8494d28b8f3bc6e0d9aeed4 |
| institution | OA Journals |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-d0e57783b8494d28b8f3bc6e0d9aeed42025-08-20T01:49:43ZengNature PortfolioNature Communications2041-17232025-05-0116111410.1038/s41467-025-59512-9Structure of a photosystem II-FCPII supercomplex from a haptophyte reveals a distinct antenna organizationRomain La Rocca0Koji Kato1Pi-Cheng Tsai2Yoshiki Nakajima3Fusamichi Akita4Jian-Ren Shen5Research Institute for Interdisciplinary Science, and Advanced Research Field, Graduate School of Environmental, Life, Natural Science and Technology, Okayama UniversityResearch Institute for Interdisciplinary Science, and Advanced Research Field, Graduate School of Environmental, Life, Natural Science and Technology, Okayama UniversityResearch Institute for Interdisciplinary Science, and Advanced Research Field, Graduate School of Environmental, Life, Natural Science and Technology, Okayama UniversityResearch Institute for Interdisciplinary Science, and Advanced Research Field, Graduate School of Environmental, Life, Natural Science and Technology, Okayama UniversityResearch Institute for Interdisciplinary Science, and Advanced Research Field, Graduate School of Environmental, Life, Natural Science and Technology, Okayama UniversityResearch Institute for Interdisciplinary Science, and Advanced Research Field, Graduate School of Environmental, Life, Natural Science and Technology, Okayama UniversityAbstract Haptophytes are unicellular algae that produce 30 to 50% of biomass in oceans. Among haptophytes, a subset named coccolithophores is characterized by calcified scales. Despite the importance of coccolithophores in global carbon fixation and CaCO3 production, their energy conversion system is still poorly known. Here we report a cryo-electron microscopic structure of photosystem II (PSII)-fucoxanthin chlorophyll c-binding protein (FCPII) supercomplex from Chyrostila roscoffensis, a representative of coccolithophores. This complex has two sets of six dimeric and monomeric FCPIIs, with distinct orientations. Interfaces of both FCPII/FCPII and FCPII/core differ from previously reported. We also determine the sequence of Psb36, a subunit previously found in diatoms and red algae. The principal excitation energy transfer (EET) pathways involve mainly 5 FCPIIs, where one FCPII monomer mediates EET to CP47. Our findings provide a solid structural basis for EET and energy dissipation pathways occurring in coccolithophores.https://doi.org/10.1038/s41467-025-59512-9 |
| spellingShingle | Romain La Rocca Koji Kato Pi-Cheng Tsai Yoshiki Nakajima Fusamichi Akita Jian-Ren Shen Structure of a photosystem II-FCPII supercomplex from a haptophyte reveals a distinct antenna organization Nature Communications |
| title | Structure of a photosystem II-FCPII supercomplex from a haptophyte reveals a distinct antenna organization |
| title_full | Structure of a photosystem II-FCPII supercomplex from a haptophyte reveals a distinct antenna organization |
| title_fullStr | Structure of a photosystem II-FCPII supercomplex from a haptophyte reveals a distinct antenna organization |
| title_full_unstemmed | Structure of a photosystem II-FCPII supercomplex from a haptophyte reveals a distinct antenna organization |
| title_short | Structure of a photosystem II-FCPII supercomplex from a haptophyte reveals a distinct antenna organization |
| title_sort | structure of a photosystem ii fcpii supercomplex from a haptophyte reveals a distinct antenna organization |
| url | https://doi.org/10.1038/s41467-025-59512-9 |
| work_keys_str_mv | AT romainlarocca structureofaphotosystemiifcpiisupercomplexfromahaptophyterevealsadistinctantennaorganization AT kojikato structureofaphotosystemiifcpiisupercomplexfromahaptophyterevealsadistinctantennaorganization AT pichengtsai structureofaphotosystemiifcpiisupercomplexfromahaptophyterevealsadistinctantennaorganization AT yoshikinakajima structureofaphotosystemiifcpiisupercomplexfromahaptophyterevealsadistinctantennaorganization AT fusamichiakita structureofaphotosystemiifcpiisupercomplexfromahaptophyterevealsadistinctantennaorganization AT jianrenshen structureofaphotosystemiifcpiisupercomplexfromahaptophyterevealsadistinctantennaorganization |