Abstract:
:Strategies to harness photosynthesis from living organisms to generate electrical power have long been considered, yet efficiency remains low. Here, we aimed to reroute photosynthetic electron flow in photosynthetic organisms without compromising their phototrophic properties. We show that 2,6-dimethyl-p-benzoquinone (DMBQ) can be used as an electron mediator to assess the efficiency of mutations designed to engineer a novel electron donation pathway downstream of the primary electron acceptor QA of Photosystem (PS) II in the green alga Chlamydomonas reinhardtii. Through the use of structural prediction studies and a screen of site-directed PSII mutants we show that modifying the environment of the QA site increases the reduction rate of DMBQ. Truncating the C-terminus of the PsbT subunit protruding in the stroma provides evidence that shortening the distance between QA and DMBQ leads to sustained electron transfer to DMBQ, as confirmed by chronoamperometry, consistent with a bypass of the natural QA°- to QB pathway.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Fu HY,Picot D,Choquet Y,Longatte G,Sayegh A,Delacotte J,Guille-Collignon M,Lemaître F,Rappaport F,Wollman FAdoi
10.1038/ncomms15274subject
Has Abstractpub_date
2017-05-03 00:00:00pages
15274issn
2041-1723pii
ncomms15274journal_volume
8pub_type
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