Affiliation:
1. National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant Sciences / Institute of Plant Physiology and Ecology 300 Fenglin Road Shanghai 200032 P.R. China
Abstract
SUMMARYCyclic electron transport (CET) around photosystem I (PSI) is crucial for photosynthesis to perform photoprotection and sustain the balance of ATP and NADPH. However, the critical component of CET, cyt b6f complex (cyt b6f), functions in CET has yet to be understood entirely. In this study, we found that NdhS, a subunit of NADPH dehydrogenase‐like (NDH) complex, interacted with cyt b6f to form a complex in Arabidopsis. This interaction depended on the N‐terminal extension of NdhS, which was conserved in eukaryotic plants but defective in prokaryotic algae. The migration of NdhS was much more in cyt b6f than in PSI‐NDH super‐complex. Based on these results, we suggested that NdhS and NADP+ oxidoreductase provide a docking domain for the mobile electron carrier ferredoxin to transfer electrons to the plastoquinone pool via cyt b6f in eukaryotic photosynthesis.
Funder
Chinese Academy of Sciences
National Natural Science Foundation of China
Subject
Cell Biology,Plant Science,Genetics