1.14.13.122: chlorophyllide-a oxygenase
This is an abbreviated version!
For detailed information about chlorophyllide-a oxygenase, go to the full flat file.
Word Map on EC 1.14.13.122
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1.14.13.122
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light-harvesting
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antenna
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photosystems
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protochlorophyllide
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rieske
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7-hydroxymethyl
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b-less
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prochlorophytes
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dark-induced
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chelatase
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pheophorbide
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lhcii
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high-light
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acaryochloris
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magnesium-protoporphyrin
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low-light
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hollandica
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prochlorothrix
- 1.14.13.122
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light-harvesting
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antenna
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photosystems
- protochlorophyllide
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rieske
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7-hydroxymethyl
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b-less
- prochlorophytes
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dark-induced
- chelatase
- pheophorbide
- lhcii
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high-light
- acaryochloris
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magnesium-protoporphyrin
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low-light
- hollandica
- prochlorothrix
Reaction
Synonyms
AtPTC52, CAO, CAO1, Cao2, CAO_1, chlorophyll a oxygenase, chlorophyll a oxygenase 1, chlorophyll a oxygenase/chlorophyll b synthase, chlorophyllide a oxygenase, chlorophyllide a oxygenase 1, EC 1.13.12.14, fch2, OsCAO1, Pchlide a oxygenase, PGL, protochlorophyllide a oxygenase, ZmCAO1
ECTree
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Natural Substrates Products
Natural Substrates Products on EC 1.14.13.122 - chlorophyllide-a oxygenase
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REACTION DIAGRAM
71-hydroxychlorophyllide a + O2 + NADPH + H+
chlorophyllide b + 2 H2O + NADP+
second half-reaction
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chlorophyllide a + O2 + NADPH + H+
71-hydroxychlorophyllide a + H2O + NADP+
first half-reaction
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chlorophyllide a + O2 + NADPH + H+
chlorophyllide b + 2 H2O + NADP+
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chlorophyll a precursor
immediately converted to chlorophyll b by chlorophyll synthase, the chlorophyllide a oxygenase activity is regulated at the level of protein stability via a feedback mechanism through chlorophyll b
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chlorophyllide d + O2 + NADPH + H+
[7-formyl]-chlorophyllide d + H2O + NADP+
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chlorophyllide b + H2O + NADP+
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7-hydroxychlorophyllide a + O2 + NADPH
chlorophyllide b + H2O + NADP+
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7-hydroxychlorophyllide a + O2 + NADPH
chlorophyllide b + H2O + NADP+
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7-hydroxychlorophyllide a + O2 + NADPH
chlorophyllide b + H2O + NADP+
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7-hydroxychlorophyllide a + O2 + NADPH
chlorophyllide b + H2O + NADP+
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7-hydroxychlorophyllide a + O2 + NADPH
chlorophyllide b + H2O + NADP+
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7-hydroxychlorophyllide a + O2 + NADPH
chlorophyllide b + H2O + NADP+
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7-hydroxychlorophyllide a + O2 + NADPH
chlorophyllide b + H2O + NADP+
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7-hydroxychlorophyllide a + O2 + NADPH
chlorophyllide b + H2O + NADP+
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chlorophyllide b + 3 H2O + 2 NADP+
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chlorophyllide a + 2 O2 + 2 NADPH + 2 H+
chlorophyllide b + 3 H2O + 2 NADP+
overall reaction
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7-hydroxychlorophyllide a + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
7-hydroxychlorophyllide a + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
7-hydroxychlorophyllide a + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
7-hydroxychlorophyllide a + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
7-hydroxychlorophyllide a + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
7-hydroxychlorophyllide a + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
7-hydroxychlorophyllide a + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
7-hydroxychlorophyllide a + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
7-hydroxychlorophyllide a + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
7-hydroxychlorophyllide a + H2O + NADP+
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chlorophyllide b + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
chlorophyllide b + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
chlorophyllide b + H2O + NADP+
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intermediate 7-hydroxymetyl(ide) chlorophyll a
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chlorophyllide a + O2 + NADPH + H+
chlorophyllide b + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
chlorophyllide b + H2O + NADP+
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chlorophyllide a + O2 + NADPH + H+
chlorophyllide b + H2O + NADP+
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chlorophyll b is required for assembly of the light-harvesting complexes
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additional information
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chlorophyll b synthesis by the enzyme is a key regulatory step in the control of antenna size, changing the antenna size of photosystems allows plants to acclimate to variations in light intensity for efficient photosynthesis creating a protective strategy to minimize photodamage, the chlorophyll b feedback regulates enzyme accumulation via the N-terminal domain A
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additional information
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chlorophyll b synthesis is involved in regulation of photosystem II antenna size via chlorophyll b content in the light-harvesting complex II
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additional information
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enzyme mRNA and protein levels correlate with the chlorophyll a/b ratio, enzyme expression is regulated by irradiation, enzyme activity in required for enlargment of light harvesting complex II during photoacclimation
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additional information
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key enzyme for chlorophyll b biosynthesis
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additional information
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key enzyme for chlorophyll b biosynthesis
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additional information
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land plants change the compositions of light-harvesting complexes and chlorophyll a/b ratios in response to the variable light environments which they encounter, and the enzyme is part of the regulatory mechanism, overview
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additional information
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the enzyme is involved in antenna pigment synthesis required for light-harvesting complex II and photosynthetic growth, chlorophyll b has a regulatory role in pigment shuffling of antenna systems, overview
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additional information
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the enzyme is involved in light-dependent regulation of chlorophyll b biosynthesis which is related to the cab gene expression, chlorophyllide b is bound to the light harvesting complex II in vivo
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additional information
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the enzyme is part of a separate translocon complex involved in the regulated import and stabilization of the chlorophyllide b-binding light-harvesting proteins Lhcb1, of LHCII, and Lhcb4, of CP29, in chlorplasts
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additional information
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the enzyme is responsible for synthesis of chlorophyllide b which is a photosynthetic antenna pigment required for regulation of antenna size, overview
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additional information
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the enzyme is responsible for synthesis of chlorophyllide b which is a photosynthetic antenna pigment required for regulation of antenna size, overview
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additional information
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N-terminal domain (A-domain) of enzyme is essential for the regulatory mechanism of the enzyme
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additional information
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chlorophyll b is required for assembly of the light-harvesting complexes
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additional information
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chlorophyll b production is important for plants to adapt to varying light environments
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additional information
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chlorophyll b production is important for plants to adapt to varying light environments
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additional information
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chlorophyll b is required for assembly of the light-harvesting complexes
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additional information
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chlorophyll antenna size adjustments by irradiance involve coordinate regulation of CAO and Lhcb gene expression, cytosolic signal transduction pathway for rapid enzyme regulation/short term photoacclimation involves phospholipase C activity, mechanism, the redox state of the plastoquinone pool is also involved in enzyme regulation via the long term photoacclimation, mechanism of photoacclimation, overview
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additional information
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chlorophyll antenna size adjustments by irradiance involve coordinate regulation of CAO and Lhcb gene expression, cytosolic signal transduction pathway for rapid enzyme regulation/short term photoacclimation involves phospholipase C activity, mechanism, the redox state of the plastoquinone pool is also involved in enzyme regulation via the long term photoacclimation, mechanism of photoacclimation, overview
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additional information
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the enzyme is involved in light-dependent regulation of chlorophyll b biosynthesis, chlorophyllide b is bound to the light harvesting complex II in vivo
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additional information
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isozyme CAO1 is important in chlorophyll b biosynthesis
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additional information
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the enzyme is involved in antenna pigment synthesis required for light-harvesting complexe II and photosynthetic growth, chlorophyll b has a regulatory role in pigment shuffling of antenna systems, overview
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additional information
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a chloroplast Clp protease is involved in regulating chlorophyll b biosynthesis through the destabilization of chlorophyllide a oxygenase in response to the accumulation of chlorophyll b
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