Proton and Water Transfer Pathways in the S2 → S3 Transition of the Water-Oxidizing Complex in Photosystem II: Time-Resolved Infrared Analysis of the Effects of D1-N298A Mutation and NO3– Substitution

2021 ◽  
Author(s):  
Yasutada Okamoto ◽  
Yuichiro Shimada ◽  
Ryo Nagao ◽  
Takumi Noguchi
Keyword(s):  
Photosystem Ii ◽  
Water Transfer ◽  
Infrared Analysis ◽  
Time Resolved ◽  
Water Oxidizing Complex

A Mn(II)−Mn(III) EPR Signal Arises from the Interaction of NO with the S1State of the Water-Oxidizing Complex of Photosystem II†

Biochemistry ◽  
1998 ◽  
Vol 37 (11) ◽  
pp. 3581-3587 ◽  
Author(s):  
Josephine Sarrou ◽  
Nikolaos Ioannidis ◽  
Yannis Deligiannakis ◽  
Vasili Petrouleas
Keyword(s):  
Photosystem Ii ◽  
Epr Signal ◽  
Water Oxidizing Complex

Photoactivation of the water-oxidizing complex of photosystem II core complex depleted of functional Mn

1991 ◽  
Vol 1060 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Noriaki Tamura ◽  
Hiroyuki Kamachi ◽  
Nobuyuki Hokari ◽  
Harutoshi Masumoto ◽  
Hiroshi Inoué
Keyword(s):  
Photosystem Ii ◽  
Core Complex ◽  
Water Oxidizing Complex

Near-IR Irradiation of the S2State of the Water Oxidizing Complex of Photosystem II at Liquid Helium Temperatures Produces the Metalloradical Intermediate Attributed to S1YZ• †

Biochemistry ◽  
2003 ◽  
Vol 42 (10) ◽  
pp. 3045-3053 ◽  
Author(s):  
Dionysios Koulougliotis ◽  
Jian-Ren Shen ◽  
Nikolaos Ioannidis ◽  
Vasili Petrouleas
Keyword(s):  
Photosystem Ii ◽  
Liquid Helium ◽  
Near Ir ◽  
Water Oxidizing Complex

Stabilization of the oxygen-evolving complex of photosystem II bybicarbonate and glycinebetaine in thylakoid and subthylakoidpreparations

2003 ◽  
Vol 30 (7) ◽  
pp. 797 ◽  
Author(s):  
Vyacheslav V. Klimov ◽  
Suleyman I. Allakhverdiev ◽  
Yoshitaka Nishiyama ◽  
AndreiA. Khorobrykh ◽  
Norio Murata
Keyword(s):  
Photosystem Ii ◽  
Protective Effect ◽  
Thermal Inactivation ◽  
Oxygen Evolving Complex ◽  
Photosynthetic Oxygen Evolution ◽  
Protective Effects ◽  
Synechococcus Sp ◽  
Oxygen Evolving ◽  
Triton X ◽  
Water Oxidizing Complex

The protective effect of 1 M glycinebetaine on thermal inactivation of photosynthetic oxygen evolution in isolated photosystem II membrane fragments from spinach is observed in CO2-free medium in both the presence and absence of added 2 mM bicarbonate. Conversely, the protective effect of 2 mM bicarbonate against thermoinactivation is seen in the absence as well as in the presence of 1 M glycinebetaine. The stabilizing effect of bicarbonate is also observed in thylakoid membranes from Synechococcus sp. PCC 7002 treated with 0.1% Triton X-100, and in unbroken spinach thylakoids. It is shown for the first time that bicarbonate protects the water-oxidizing complex against inactivation induced by pre-incubation of photosystem II membrane fragments (25°C) and thylakoids (40°C) at low pH (5.0–5.5) in non-bicarbonate-depleted medium. We conclude that the protective effects of glycinebetaine and bicarbonate are of a different nature; glycinebetaine acts as a non-specific, compatible, zwitterionic osmolyte while bicarbonate is considered an essential constituent of the water-oxidizing complex of photosystem II, important for its functioning and stabilization.

scholarly journals Natural isoforms of the Photosystem II D1 subunit differ in photoassembly efficiency of the water-oxidizing complex

2015 ◽  
Vol 128 (2) ◽  
pp. 141-150 ◽  
Author(s):  
David J. Vinyard ◽  
Jennifer S. Sun ◽  
Javier Gimpel ◽  
Gennady M. Ananyev ◽  
Stephen P. Mayfield ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Water Oxidizing Complex

Fluorescence property of photosystem II protein complexes bound to a gold nanoparticle

2017 ◽  
Vol 198 ◽  
pp. 121-134 ◽  
Author(s):  
Kazuki Tahara ◽  
Ahmed Mohamed ◽  
Kousuke Kawahara ◽  
Ryo Nagao ◽  
Yuki Kato ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Gold Nanoparticle ◽  
Water Oxidation ◽  
Artificial Photosynthesis ◽  
Fluorescence Property ◽  
Light Illumination ◽  
Time Resolved Fluorescence ◽  
Strong Light ◽  
Time Resolved ◽  
Fluorescence Measurements

Development of an efficient photo-anode system for water oxidation is key to the success of artificial photosynthesis. We previously assembled photosystem II (PSII) proteins, which are an efficient natural photocatalyst for water oxidation, on a gold nanoparticle (GNP) to prepare a PSII–GNP conjugate as an anode system in a light-driven water-splitting nano-device (Noji et al., J. Phys. Chem. Lett., 2011, 2, 2448–2452). In the current study, we characterized the fluorescence property of the PSII–GNP conjugate by static and time-resolved fluorescence measurements, and compared with that of free PSII proteins. It was shown that in a static fluorescence spectrum measured at 77 K, the amplitude of a major peak at 683 nm was significantly reduced and a red shoulder at 693 nm disappeared in PSII–GNP. Time-resolved fluorescence measurements showed that picosecond components at 683 nm decayed faster by factors of 1.4–2.1 in PSII–GNP than in free PSII, explaining the observed quenching of the major fluorescence peak. In addition, a nanosecond-decay component arising from a ‘red chlorophyll’ at 693 nm was lost in time-resolved fluorescence of PSII–GNP, probably due to a structural perturbation of this chlorophyll by interaction with GNP. Consistently with these fluorescence properties, degradation of PSII during strong-light illumination was two times slower in PSII–GNP than in free PSII. The enhanced durability of PSII is an advantageous property of the PSII–GNP conjugate in the development of an artificial photosynthesis device.

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