Photosynthetic light-harvesting complexes (LHCs) play a pivotal role in collecting solar energy for photochemical reactions in photosynthesis. One of the major LHCs are fucoxanthin chlorophyll a/c-binding proteins (FCPs) present in diatoms, a group of organisms having important contribution to the global carbon cycle. Here, we report a 2.40-Å resolution structure of the diatom photosystem I (PSI)-FCPI supercomplex by cryo-electron microscopy. The supercomplex is composed of 16 different FCPI subunits surrounding a monomeric PSI core. Each FCPI subunit showed different protein structures with different pigment contents and binding sites, and they form a complicated pigment-protein network together with the PSI core to harvest and transfer the light energy efficiently. In addition, two unique, previously unidentified subunits were found in the PSI core. The structure provides numerous insights into not only the light-harvesting strategy in diatom PSI-FCPI but also evolutionary dynamics of light harvesters among oxyphototrophs.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7235021 | PMC |
| http://dx.doi.org/10.1038/s41467-020-16324-3 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Recent Advances of Macrostructural Porous Silicon for Biomedical Applications.
ACS Appl Mater Interfaces
January 2025
College of Medicine, Kyung Hee University, Seoul 02447, Republic of Korea.
Porous silicon (pSi) has gained substantial attention as a versatile material for various biomedical applications due to its unique structural and functional properties. Initially used as a semiconductor material, pSi has transitioned into a bioactive platform, enabling its use in drug delivery systems, biosensing, tissue engineering scaffolds, and implantable devices. This review explores recent advancements in macrostructural pSi, emphasizing its biocompatibility, biodegradability, high surface area, and tunable properties.
View Article and Find Full Text PDFMenstrual cycle effects on thermoregulation while exercising in the heat.
J Therm Biol
January 2025
School of Integrative Physiology and Athletic Training, University of Montana, 32 Campus Drive, Missoula, MT, 59812, USA. Electronic address:
Women may be challenged to maintain thermoregulation due to hormonal changes associated with the menstrual cycle. The purpose of this study was to assess the effect of the menstrual cycle phase on core temperature, hydration status, and perceived exertion while exercising under uncompensable heat gain. Eleven eumenorrheic women (24.
View Article and Find Full Text PDFInvestigating skyrmion stability and core polarity reversal in NdMnGe.
Sci Rep
January 2025
Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093, Zurich, Switzerland.
We present a study on nanoscale skyrmionic spin textures in [Formula: see text], a rare-earth complex noncollinear ferromagnet. We confirm, using X-ray microscopy, that [Formula: see text] can host lattices of metastable skyrmion bubbles at room temperature in the absence of a magnetic field, after applying a suitable field cooling protocol. The skyrmion bubbles are robust against temperature changes from room temperature to 330 K.
View Article and Find Full Text PDFResidual Stress Distribution in Dievar Tool Steel Bars Produced by Conventional Additive Manufacturing and Rotary Swaging Processes.
Materials (Basel)
November 2024
Nuclear Physics Institute of the Czech Academy of Sciences, Husinec-Řež 130, 250 68 Řež, Czech Republic.
Article Synopsis
- The study examines how different manufacturing methods affect residual stresses in Dievar steel, comparing conventional ingot casting with selective laser melting (SLM) followed by hot rotary swaging.
- Rotary swaging significantly improved microstructure and hardness, decreasing residual stresses in SLM components from -600 MPa in the core to -300 MPa post-treatment, while enhancing overall material properties.
- The findings highlight the effectiveness of rotary swaging as a post-processing technique for optimizing mechanical performance and minimizing failure risks in additively manufactured steel.
Structures of PSI-FCPI from Thalassiosira pseudonana grown under high light provide evidence for convergent evolution and light-adaptive strategies in diatom FCPIs.
J Integr Plant Biol
December 2024
Key Laboratory of Photobiology, Photosynthesis Research Center, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
Diatoms rely on fucoxanthin chlorophyll a/c-binding proteins (FCPs) for light harvesting and energy quenching under marine environments. Here we report two cryo-electron microscopic structures of photosystem I (PSI) with either 13 or five fucoxanthin chlorophyll a/c-binding protein Is (FCPIs) at 2.78 and 3.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!