A nuclear CobW/WW-domain factor represses the CO2-concentrating mechanism in the green alga Chlamydomonas reinhardtii

Proceedings of the National Academy of Sciences, Volume 123, Number 6, February 2026.
ImportanceAlgae grows by activating a CO2 concentrating mechanism (CCM) when dissolved CO2 is limited, but must deactivate it when CO2 levels increase to conserve energy. We identified the nuclear protein that represses CCM gene expression under…