The V-type ATPase enhances photosynthesis in marine phytoplankton and further links phagocytosis to symbiogenesis.

ABSTRACT: Diatoms, dinoflagellates, and coccolithophores are dominant groups of marine eukaryotic phytoplankton that are collectively responsible for the majority of primary production in the ocean.¹ These phytoplankton contain additional intracellular membranes around their chloroplasts, which are derived from ancestral engulfment of red microalgae by unicellular heterotrophic eukaryotes that led to secondary and tertiary endosymbiosis.² However, the selectable evolutionary advantage of these membranes and the physiological significance for extant phytoplankton remain poorly understood. Since intracellular digestive vacuoles are ubiquitously acidified by V-type H⁺-ATPase (VHA),³ proton pumps were proposed to acidify the microenvironment around secondary c

SUBMITTER: Yee DP 

PROVIDER: S-EPMC10326425 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature