Naslov
15 years of photosynthesis research in Croatia - cracking the TROL

Autori
Fulgosi, Hrvoje ; Vojta, Lea ; Rac, Anja

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

Izvornik
4th Congress of Croatian Geneticists with international participation : Book of Abstracts / Šarčević, Hrvoje ; Ugarković, Đurđica ; Vujaklija, Dušica ; Svetec, Ivan Krešimir ; Svetec Miklenić, Marina - Zagreb : Hrvatsko genetičko društvo, 2018, 16-16

ISBN
978-953-57128-1-7

Skup
4th Congress of Croatian Geneticists with international participation

Mjesto i datum
Krk, Hrvatska, 26.09.2018. - 29.09.2018

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
photosynthetic electron transport ; Photosystem I ; ROS ; electron paramagnetic resonance

Sažetak
Oxygenic photosynthesis, performed by plants, algae, and cyanobacteria, is arguably the most important autotrophic process on Earth. Photosynthetic light-to-chemical energy conversion involves numerous electron transfer steps that require rapid and streamlined reactions in order to maintain efficacy and prevent energy leaks to undesignated acceptors, mainly oxygen. Flavoenzyme FNR (ferredoxin:NADP+ oxidoreductase) catalyzes the last step of energy transfer in the linear photosynthetic chain, namely electron transfer from ferredoxin to NADP+. FNR utilizes two reduced ferredoxins to produce one molecule of NADPH. This reaction must be performed with high fidelity in order to prevent ferredoxin from passing electrons to other molecular targets or pathways. FNR is tethered to photosynthetic membranes of vascular plants via an integral membrane protein TROL (thylakoid rhodanaselike protein). Another soluble chloroplast protein Tic62 also participates in FNR sequestration. TROL binds FNR at the vicinity of photosystem I and prioritizes linear electron transfer. When FNR is released from the TROL, highly efficient electron sink is activated. This pathway is faster than methyl viologen-mediated ROS propagation and represents so far undescribed mechanism of photosynthesis regulation.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA