Characterization of mutants deficient in N-terminal phosphorylation of the chloroplast ATP synthase subunit β.

ABSTRACT: Understanding the regulation of photosynthetic light harvesting and electron transfer is of great importance to efforts to improve the ability of the electron transport chain to supply downstream metabolism. A central regulator of the electron transport chain is ATP synthase, the molecular motor that harnesses the chemiosmotic potential generated from proton-coupled electron transport to synthesize ATP. ATP synthase is regulated both thermodynamically and post-translationally, with proposed phosphorylation sites on multiple subunits. In this study we focused on two N-terminal serines on the catalytic subunit β in tobacco (Nicotiana tabacum), previously proposed to be important for dark inactivation of the complex to avoid ATP hydrolysis at night. Here we show that there is no clear role fo

SUBMITTER: Strand DD 

PROVIDER: S-EPMC10022623 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature