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Literature summary for 1.10.3.9 extracted from

  • Ohad, I.; Raanan, H.; Keren, N.; Tchernov, D.; Kaplan, A.
    Light-induced changes within photosystem II protects Microcoleus sp. in biological desert sand crusts against excess light (2010), PLoS ONE, 5, e11000.
    View publication on PubMedView publication on EuropePMC

Inhibitors

Inhibitors Comment Organism Structure
additional information light-induced oxidative stress leads to photoinactivation of the oxygen-evolving photosystem II. In contrast to model organisms, photosynthesis persists in Microcoleus sp. even at light intensities 2-3times higher than required to saturate oxygen evolution. This is despite an extensive loss (85-90%) of variable fluorescence and thermoluminescence, representing radiative PSII charge recombination that promotes the generation of damaging singlet oxygen. Light induced loss of variable fluorescence is not inhibited by the electron transfer inhibitors 3-(3,4-dichlorophenyl)-1,1-dimethylurea, 2,5-dibromo-3-methyl-6-isopropylbenzoquinone, nor the uncoupler carbonyl cyanide-p-trifluoromethoxyphenylhydrazone, thus indicating that reduction of plastoquinone or O2, or lumen acidification essential for non-photochemical quenching are not involved Microcoleus sp.

Localization

Localization Comment Organism GeneOntology No. Textmining

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2 H2O + 2 plastoquinone + 4 hv Microcoleus sp.
-
O2 + 2 plastoquinol
-
?

Organism

Organism UniProt Comment Textmining
Microcoleus sp.
-
-
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2 H2O + 2 plastoquinone + 4 hv
-
Microcoleus sp. O2 + 2 plastoquinol
-
?
additional information application of electron acceptors from PSII, 2,6-dimethylbenzoquinone and,2,6-dichlorophenolindophenol, to measure PSII activity Microcoleus sp. ?
-
?

Synonyms

Synonyms Comment Organism
oxygen-evolving photosystem II
-
Microcoleus sp.
PSII
-
Microcoleus sp.

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
25
-
-
Microcoleus sp.