PMID: 11607279Feb 15, 1992Paper

Reversible and irreversible intermediates during photoinhibition of photosystem II: stable reduced QA species promote chlorophyll triplet formation

Proceedings of the National Academy of Sciences of the United States of America
I VassB Andersson

Abstract

Photoinhibition of photosynthesis was studied in isolated photosystem II membranes by using chlorophyll fluorescence and electron paramagnetic resonance (EPR) spectroscopy combined with protein analysis. Under anaerobic conditions four sequentially intermediate steps in the photoinhibitory process were identified and characterized. These intermediates show high dark chlorophyll fluorescence (Foi) with typical decay kinetics (fast, semistable, stable, and nondecaying). The fast-decaying state has no bound QB but possesses a single reduced QA species with a 30-s decay half-time in the dark (QB, second quinone acceptor; QA, first quinone acceptor). In the semistable state, Q-A is stabilized for 2-3 min, most likely by protonation, and gives rise to the Q-A Fe2+ EPR signal in the dark. In the stable state, QA has become double reduced and is stabilized for 0.5-2 hr by protonation and a protein conformational change. The final, nondecaying state is likely to represent centers where QA H2 has left its binding site. The first three photoinhibitory states are reversible in the dark through reestablishment of QA to QB electron transfer. Significantly, illumination at 4 K of anaerobically photoinhibited centers trapped in all but the fas...Continue Reading

Citations

May 1, 1996·Photosynthesis Research·J Lavergne, P Joliot
Aug 1, 1993·Photosynthesis Research·A Krieger, E Weis
Feb 21, 2008·European Biophysics Journal : EBJ·Adjaci F UchoaMauricio S Baptista
Jul 29, 2005·Photosynthesis Research·Yoshitaka NishiyamaNorio Murata
Jul 29, 2005·Photosynthesis Research·András SzilárdImre Vass
Jul 29, 2005·Photosynthesis Research·Esa TyystjärviPäivi Sarvikas
Aug 19, 2008·Photosynthesis Research·Marvin Edelman, Autar K Mattoo
Sep 10, 2008·Photosynthesis Research·Anja Krieger-LiszkayAchim Trebst
Sep 30, 2008·Photosynthesis Research·Alexander G IvanovNorman P A Huner
Oct 22, 2008·Photosynthesis Research·Yasusi YamamotoYoko Yamamoto
Jun 25, 2009·Photosynthesis Research·Jean-Marc Ducruet, Imre Vass
Nov 20, 2012·Photosynthesis Research·Tina M Dreaden Kasson, Bridgette A Barry
Nov 23, 2011·Biochemistry·Michael D McConnellKevin E Redding
Oct 7, 2009·Proceedings of the National Academy of Sciences of the United States of America·Yuki KatoTadashi Watanabe
Apr 17, 2013·Proceedings of the National Academy of Sciences of the United States of America·Alena VolgushevaFikret Mamedov
Sep 1, 1992·Proceedings of the National Academy of Sciences of the United States of America·L NedbalJ Whitmarsh
Mar 5, 1996·Proceedings of the National Academy of Sciences of the United States of America·E Tyystjärvi, E M Aro
Jul 21, 2010·Journal of Experimental Botany·Päivi SarvikasEsa Tyystjärvi
Dec 15, 1996·European Journal of Biochemistry·G M GiacomettiF Rigoni
Mar 12, 2004·Annual Review of Plant Physiology and Plant Molecular Biology·Krishna K. Niyogi

❮ Previous
Next ❯

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.