1.10.3.9: photosystem II
This is an abbreviated version!
For detailed information about photosystem II, go to the full flat file.
Word Map on EC 1.10.3.9
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1.10.3.9
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chlorophyll
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chloroplast
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thylakoids
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photochemical
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light-harvesting
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antenna
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photoinhibition
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spinach
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cyanobacterium
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illumination
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synechocystis
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co2
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dissipation
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photoprotection
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photochemistry
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non-photochemical
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qa
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manganese
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epr
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light-induced
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acclimation
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photon
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lhcii
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reinhardtii
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stomatal
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flash
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carotenoid
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extrinsic
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chlamydomonas
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photodamage
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herbicide
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supercomplexes
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synechococcus
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dark-adapted
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elongatus
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zeaxanthin
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singlet
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pigment-protein
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photoautotrophic
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xanthophyl
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photooxidation
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solar
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phytoplankton
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photoinactivation
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excitonic
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atrazine
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photoreduction
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plastocyanin
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far-red
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light-driven
- 1.10.3.9
- chlorophyll
- chloroplast
- thylakoids
-
photochemical
-
light-harvesting
- antenna
-
photoinhibition
- spinach
- cyanobacterium
- illumination
- synechocystis
- co2
-
dissipation
-
photoprotection
-
photochemistry
-
non-photochemical
- qa
- manganese
- epr
-
light-induced
-
acclimation
-
photon
- lhcii
- reinhardtii
-
stomatal
- flash
-
carotenoid
-
extrinsic
- chlamydomonas
-
photodamage
-
herbicide
-
supercomplexes
- synechococcus
-
dark-adapted
- elongatus
- zeaxanthin
-
singlet
-
pigment-protein
-
photoautotrophic
-
xanthophyl
- photooxidation
-
solar
-
phytoplankton
-
photoinactivation
-
excitonic
- atrazine
-
photoreduction
- plastocyanin
-
far-red
-
light-driven
Reaction
2 H2O
+
2 plastoquinone
+
4 hnu
=
Synonyms
oxygen-evolving photosystem II, Photosystem II, photosystem II lipoprotein Psb27, photosystem II protein D1 1, photosystem II protein D1 2, PS II, PsbA1, PsbA2, PSII, water:plastoquinone oxido-reductase, water:plastoquinone oxidoreductase
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1.10.3.9 photosystem IIAdvanced search results
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results (Inhibitors
Inhibitors on EC 1.10.3.9 - photosystem II
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INHIBITOR 
ORGANISM
UNIPROT
COMMENTARY 
LITERATURE
IMAGE
digalactosyldiacylglycerol
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minor influence on the reduction kinetics of plastoquinone QA
monogalactosyldiacylglycerol
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minor influence on the reduction kinetics of plastoquinone QA
phosphatidylglycerol
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perturbs the intrinsic PSII electron transport, leading to a dissociation of the inner antenna protein CP43 and the 27- and 25-kDa apoproteins of the light-harvesting complex II. Influence is much less than sulfoquinovosyldiacylglycerol
sulfoquinovosyldiacylglycerol
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presence of sulfoquinovosyldiacylglycerol perturbs the intrinsic PSII electron transport significantly, leading to a dissociation of the inner antenna protein CP43 and the 27- and 25-kDa apoproteins of the light-harvesting complex II
3-(3,4-dichlorophenyl)-1,1-dimethylurea
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binds to plastoquinone binding site QB, 50% inhibition of signal in electron paramagnetic resonance spin-trapping spectroscopy using 5-(ethoxycarbonyl)-5-methyl-1-pyrroline N-oxide and inhibits photoreduction of the high-potential form of cytochrome b559
3-[3,4-dichlorophenyl]-1,1-dimethylurea
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stress factor inhibiting photosynthesis
formate
Thermostichus vulcanus
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formate ligation to Fe2+ does not significantly affect the protonation of reduced Q, Fe2+ inhibits QBH2 release rather than its formation
additional information
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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
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additional information
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inhibitory efficiency of ring-substituted 8-hydroxyquinoline-2-carboxanilides depends on the compound lipophilicity, the electronic properties of the substituent R and the position of the substituent R on the benzene ring. Compounds probably bind the section between P680 and plastoquinone QB on the acceptor side of PS II
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additional information
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under UV-B stress, none of the D1 isoforms is significantly induced or accumulates. UV-B stress leads to changes in electron flow on the acceptor side of the PSII complex resulting from an increased redox potential gap between QA and plastoquinone pool.
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