Responses of the marine diatom Thalassiosira pseudonana to changes in CO₂ concentration: a proteomic approach.

ABSTRACT: The concentration of CO₂ in many aquatic systems is variable, often lower than the K_M of the primary carboxylating enzyme Rubisco, and in order to photosynthesize efficiently, many algae operate a facultative CO₂ concentrating mechanism (CCM). Here we measured the responses of a marine diatom, Thalassiosira pseudonana, to high and low concentrations of CO₂ at the level of transcripts, proteins and enzyme activity. Low CO₂ caused many metabolic pathways to be remodeled. Carbon acquisition enzymes, primarily carbonic anhydrase, stress, degradation and signaling proteins were more abundant while proteins associated with nitrogen metabolism, energy production and chaperones were less abundant. A protein with similarities to the Ca^2+</

SUBMITTER: Clement R 

PROVIDER: S-EPMC5299434 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature