Articles | Volume 18, issue 2
https://doi.org/10.5194/bg-18-393-2021
https://doi.org/10.5194/bg-18-393-2021
Research article
 | 
18 Jan 2021
Research article |  | 18 Jan 2021

Carbonic anhydrase is involved in calcification by the benthic foraminifer Amphistegina lessonii

Siham de Goeyse, Alice E. Webb, Gert-Jan Reichart, and Lennart J. de Nooijer

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Cited articles

Bentov, S., Brownlee, C., and Erez, J.: The role of seawater endocytosis in the biomineralization process in calcareous foraminifera, P. Natl. Acad. Sci. USA, 106, 21500–21504, https://doi.org/10.1073/pnas.0906636106, 2009. 
Bertucci, A., Moya, A., Tambutté, S., Allemand, D., Supuran, C. T., and Zoccola, D.: Carbonic anhydrases in anthozoan corals – A review, Bioorgan. Med. Chem., 21, 1437–1450, https://doi.org/10.1016/j.bmc.2012.10.024, 2013. 
Brownlee, C., Wheeler, G. L., and Taylor, A. R.: Coccolithophore biomineralization: New questions, new answers, Semin. Cell Dev. Biol., 46, 11–16, https://doi.org/10.1016/j.semcdb.2015.10.027, 2015. 
Chen, S., Gagnon, A. C., and Adkins, J. F.: Carbonic anhydrase, coral calcification and a new model of stable isotope vital effects, Geochim. Cosmochim. Ac., 236, 179–197, https://doi.org/10.1016/j.gca.2018.02.032, 2018. 
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Short summary
Foraminifera are calcifying organisms that play a role in the marine inorganic-carbon cycle and are widely used to reconstruct paleoclimates. However, the fundamental process by which they calcify remains essentially unknown. Here we use inhibitors to show that an enzyme is speeding up the conversion between bicarbonate and CO2. This helps the foraminifera acquire sufficient carbon for calcification and might aid their tolerance to elevated CO2 level.
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