Naslov
The roles of ferredoxin:NADP(+) oxidoreductase in photosynthetic energy conversion

Autori
Fulgosi, Hrvoje ; Vojta, Lea

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts, COST -FeSBionet Conference / Piccioli, Mario ; Spyroulias, Georgious A. - Patras : University of Patras, 2016, 3-3

Skup
COST-FeSBionet Conference, Biogenesis of Iron-sulfur Proteins: from Cellular Biology to Molecular Aspects

Mjesto i datum
Patras, Grčka, 21.09.2016. - 24.09.2016

Vrsta sudjelovanja
Plenarno

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
FNR; PSI; TROL; Arabidopsis

Sažetak
Plant photosynthetic linear electron transport chain (LET) transfers electrons generated by photosystems II and I to a small iron-sulphur protein ferredoxin (Fd). Fd acts simultaneously as a bottleneck and as a branching point that distributes high-energy electrons to several alternative electron transport chains and a multitude of enzymes. However, the dominant pathway in chloroplasts is the one that produces NADPH, by the activity of ferredoxin-NADP+-oxidoreductase (FNR). FNR is a soluble protein that exists in several isoforms and utilizes two reduced Fds to produce one molecule of NADPH. We have demonstrated that thylakoid rhodanase-like protein TROL acts as a bona fide photosynthetic membrane attachment point for FNR1, although other associations with thylakoid and inner envelope membranes have been described. We have also proposed a scheme for the dynamic FNR recruitment to TROL2, 3. We speculate that TROL-FNR interaction represents branching point between electron-conserving and electron-dissipating pathways. Alternative Fd-dependent pathways downstream of PSI and different from the LET may become dominant by the dynamic detachment of FNR form TROL, thus suggesting a novel mechanism of photosynthesis regulation. Also, efficient scavenging of O2.- radicals by FNR-dependent mechanism can be envisaged.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA