The physiological importance of photosynthetic ferredoxin NADP+ oxidoreductase (FNR) isoforms in wheat.

ABSTRACT: Ferredoxin NADP(+) oxidoreductase (FNR) enzymes catalyse electron transfer between ferredoxin and NADPH. In plants, a photosynthetic FNR (pFNR) transfers electrons from reduced ferredoxin to NADPH for the final step of linear electron flow, providing reductant for carbon fixation. pFNR is also thought to play important roles in two different mechanisms of cyclic electron flow around photosystem I; and photosynthetic reductant is itself partitioned between competing linear, cyclic, and alternative electron flow pathways. Four pFNR protein isoforms in wheat that display distinct reaction kinetics with leaf-type ferredoxin have previously been identified. It has been suggested that these isoforms may be crucial to the regulation of reductant partition between carbon fixation and other metabol

SUBMITTER: Moolna A 

PROVIDER: S-EPMC2882262 | biostudies-literature | 2010 Jun

REPOSITORIES: biostudies-literature