A joint proteomic and genomic investigation provides insights into the mechanism of calcification in coccolithophores

Alastair Skeffington, Axel Fischer, Sanja Sviben, Magdalena Brzezinka, Michał Górka, Luca Bertinetti, Christian Woehle, Bruno Huettel, Alexander Graf and André Scheffel ()
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Alastair Skeffington: Max-Planck Institute of Molecular Plant Physiology
Axel Fischer: Max-Planck Institute of Molecular Plant Physiology
Sanja Sviben: Max-Planck Institute of Molecular Plant Physiology
Magdalena Brzezinka: Max-Planck Institute of Molecular Plant Physiology
Michał Górka: Max-Planck Institute of Molecular Plant Physiology
Luca Bertinetti: Max Planck Institute of Colloids and Interfaces
Christian Woehle: Max Planck-Genome-Centre Cologne
Bruno Huettel: Max Planck-Genome-Centre Cologne
Alexander Graf: Max-Planck Institute of Molecular Plant Physiology
André Scheffel: Technische Universität Dresden, Faculty of Biology

Nature Communications, 2023, vol. 14, issue 1, 1-15

Abstract: Abstract Coccolithophores are globally abundant, calcifying microalgae that have profound effects on marine biogeochemical cycles, the climate, and life in the oceans. They are characterized by a cell wall of CaCO3 scales called coccoliths, which may contribute to their ecological success. The intricate morphologies of coccoliths are of interest for biomimetic materials synthesis. Despite the global impact of coccolithophore calcification, we know little about the molecular machinery underpinning coccolithophore biology. Working on the model Emiliania huxleyi, a globally distributed bloom-former, we deploy a range of proteomic strategies to identify coccolithogenesis-related proteins. These analyses are supported by a new genome, with gene models derived from long-read transcriptome sequencing, which revealed many novel proteins specific to the calcifying haptophytes. Our experiments provide insights into proteins involved in various aspects of coccolithogenesis. Our improved genome, complemented with transcriptomic and proteomic data, constitutes a new resource for investigating fundamental aspects of coccolithophore biology.

Date: 2023
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DOI: 10.1038/s41467-023-39336-1

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