» Articles » PMID: 38734819

Growth Phase-dependent Reorganization of Cryptophyte Photosystem I Antennae

Overview
Journal Commun Biol
Specialty Biology
Date 2024 May 11
PMID 38734819
Authors
Affiliations
Soon will be listed here.
Abstract

Photosynthetic cryptophytes are eukaryotic algae that utilize membrane-embedded chlorophyll a/c binding proteins (CACs) and lumen-localized phycobiliproteins (PBPs) as their light-harvesting antennae. Cryptophytes go through logarithmic and stationary growth phases, and may adjust their light-harvesting capability according to their particular growth state. How cryptophytes change the type/arrangement of the photosynthetic antenna proteins to regulate their light-harvesting remains unknown. Here we solve four structures of cryptophyte photosystem I (PSI) bound with CACs that show the rearrangement of CACs at different growth phases. We identify a cryptophyte-unique protein, PsaQ, which harbors two chlorophyll molecules. PsaQ specifically binds to the lumenal region of PSI during logarithmic growth phase and may assist the association of PBPs with photosystems and energy transfer from PBPs to photosystems.

Citing Articles

Structural insights into the assembly and energy transfer of haptophyte photosystem I-light-harvesting supercomplex.

He F, Zhao L, Qu X, Li K, Guo J, Zhao F Proc Natl Acad Sci U S A. 2024; 121(50):e2413678121.

PMID: 39642204 PMC: 11648859. DOI: 10.1073/pnas.2413678121.


Unraveling the evolutionary trajectory of LHCI in red-lineage algae: Conservation, diversification, and neolocalization.

Kumazawa M, Ifuku K iScience. 2024; 27(10):110897.

PMID: 39386759 PMC: 11462038. DOI: 10.1016/j.isci.2024.110897.


Structural basis for the distinct core-antenna assembly of cryptophyte photosystem II.

Si L, Zhang S, Su X, Li M Nat Commun. 2024; 15(1):6812.

PMID: 39122741 PMC: 11316039. DOI: 10.1038/s41467-024-51206-y.

References
1.
Bai T, Guo L, Xu M, Tian L . Structural Diversity of Photosystem I and Its Light-Harvesting System in Eukaryotic Algae and Plants. Front Plant Sci. 2021; 12:781035. PMC: 8669154. DOI: 10.3389/fpls.2021.781035. View

2.
Ludwig M, Gibbs S . Localization of phycoerythrin at the lumenal surface of the thylakoid membrane in Rhodomonas lens. J Cell Biol. 1989; 108(3):875-84. PMC: 2115399. DOI: 10.1083/jcb.108.3.875. View

3.
Kereiche S, Kouril R, Oostergetel G, Fusetti F, Boekema E, Doust A . Association of chlorophyll a/c(2) complexes to photosystem I and photosystem II in the cryptophyte Rhodomonas CS24. Biochim Biophys Acta. 2008; 1777(9):1122-8. DOI: 10.1016/j.bbabio.2008.04.045. View

4.
Kucukelbir A, Sigworth F, Tagare H . Quantifying the local resolution of cryo-EM density maps. Nat Methods. 2013; 11(1):63-5. PMC: 3903095. DOI: 10.1038/nmeth.2727. View

5.
Hoffman G, Sanchez Puerta M, Delwiche C . Evolution of light-harvesting complex proteins from Chl c-containing algae. BMC Evol Biol. 2011; 11:101. PMC: 3096602. DOI: 10.1186/1471-2148-11-101. View