Structural isomers of the S2 state in photosystem II: do they exist at room temperature and are they important for function?

Physiologia Plantarum
Ruchira ChatterjeeJunko Yano

Abstract

In nature, an oxo-bridged Mn4 CaO5 cluster embedded in photosystem II (PSII), a membrane-bound multi-subunit pigment protein complex, catalyzes the water oxidation reaction that is driven by light-induced charge separations in the reaction center of PSII. The Mn4 CaO5 cluster accumulates four oxidizing equivalents to enable the four-electron four-proton catalysis of two water molecules to one dioxygen molecule and cycles through five intermediate S-states, S0  - S4 in the Kok cycle. One important question related to the catalytic mechanism of the oxygen-evolving complex (OEC) that remains is, whether structural isomers are present in some of the intermediate S-states and if such equilibria are essential for the mechanism of the O-O bond formation. Here we compare results from electron paramagnetic resonance (EPR) and X-ray absorption spectroscopy (XAS) obtained at cryogenic temperatures for the S2 state of PSII with structural data collected of the S1 , S2 and S3 states by serial crystallography at neutral pH (∼6.5) using an X-ray free electron laser at room temperature. While the cryogenic data show the presence of at least two structural forms of the S2 state, the room temperature crystallography data can be well-described by...Continue Reading

References

Oct 16, 1992·Biochimica Et Biophysica Acta·R J Debus
Oct 21, 1986·Biochemistry·W F Beck, G W Brudvig
Jun 1, 1970·Photochemistry and Photobiology·B KokM McGloin
May 2, 1998·Biochemistry·A BoussacA W Rutherford
Dec 15, 2000·Biochimica Et Biophysica Acta·J M Peloquin, R D Britt
Jun 14, 2005·Biochimica Et Biophysica Acta·Marie-France CharlotGeneviève Blondin
Aug 17, 2005·Biochemistry·M Reza RazeghifardTom Wydrzynski
Jan 1, 1981·Proceedings of the National Academy of Sciences of the United States of America·G C Dismukes, Y Siderer
Jun 7, 2007·Photosynthesis Research·Alice Haddy
Oct 30, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Takumi Noguchi
Feb 6, 2008·Proceedings of the National Academy of Sciences of the United States of America·Yulia PushkarVittal K Yachandra
May 23, 2008·Coordination Chemistry Reviews·Richard J Debus
Oct 3, 2008·Photosynthesis Research·Gernot Renger, Thomas Renger
Mar 27, 2009·Journal of the American Chemical Society·Alain BoussacPierre Dorlet
Sep 19, 2012·Proceedings of the National Academy of Sciences of the United States of America·André KlaussHolger Dau
Feb 6, 2013·Biochimica Et Biophysica Acta·Nicholas Cox, Johannes Messinger
Mar 20, 2013·Accounts of Chemical Research·Nicholas CoxWolfgang Lubitz
Jun 15, 2013·The Journal of Biological Chemistry·Carina GlöcknerJunko Yano
Apr 2, 2014·Chemical Reviews·Junko Yano, Vittal Yachandra
Apr 5, 2014·Physical Chemistry Chemical Physics : PCCP·Ravi Pokhrel, Gary W Brudvig
Apr 25, 2014·Physical Chemistry Chemical Physics : PCCP·Marius ReteganDimitrios A Pantazis
Jun 4, 2014·Proceedings of the National Academy of Sciences of the United States of America·Daniele NarziLeonardo Guidoni
Dec 25, 2015·Inorganic Chemistry·Vera KrewaldNicholas Cox
Dec 31, 2015·Inorganic Chemistry·Hiroshi IsobeKizashi Yamaguchi

❮ Previous
Next ❯

Citations

Apr 24, 2019·Physiologia Plantarum·Anja Krieger-LiszkayJohannes Messinger
Jun 13, 2019·Photosynthesis Research·Wolfgang LubitzNicholas Cox
May 7, 2020·Physical Chemistry Chemical Physics : PCCP·Casper de Lichtenberg, Johannes Messinger
Mar 27, 2020·Annual Review of Biochemistry·Nicholas CoxWolfgang Lubitz
Feb 18, 2020·Biochimica Et Biophysica Acta. Bioenergetics·Alain BoussacMiwa Sugiura
Jun 29, 2021·The Journal of Physical Chemistry. B·Thomas A CorryPatrick J O'Malley
Sep 27, 2020·Biochimica Et Biophysica Acta. Bioenergetics·Casper de LichtenbergJohannes Messinger
Dec 5, 2019·The Journal of Physical Chemistry. B·Hiroyuki Mino, Hiroki Nagashima
Aug 21, 2019·The Journal of Physical Chemistry Letters·Thomas A Corry, Patrick J O'Malley
Sep 3, 2020·The Journal of Physical Chemistry. a·Xi-Chen LiPer E M Siegbahn

❮ Previous
Next ❯

Related Concepts

Related Feeds

Barrel cortex

Here is the latest research on barrel cortex, a region of somatosensory and motor corticies in the brain, which are used by animals that rely on whiskers for world exploration.