Ligand light

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Basic Ligand Information

Molecular Formula
BRENDA Name
InChIKey
light
Pathway Source
Pathways
MetaCyc
3,8-divinyl-chlorophyllide a biosynthesis I (aerobic, light-dependent), bacterial bioluminescence, coral bioluminescence, cyclic electron flow, dinoflagellate bioluminescence more

Roles as Enzyme Ligand

In Vivo Product in Enzyme-catalyzed Reactions (5 results)

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EC NUMBER
PROVEN IN VIVO REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
luciferin + O2 + ATP = oxyluciferin + AMP + CO2 + light
show the reaction diagram
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luciferin + O2 + ATP = oxyluciferin + AMP + CO2 + light
show the reaction diagram
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Product in Enzyme-catalyzed Reactions (10 results)

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EC NUMBER
REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
luciferin + O2 + ATP = oxyluciferin + AMP + CO2 + light
show the reaction diagram
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(E)-2-methyl-4-(2,6,6-trimethyl-1-cyclohex-1-yl)-1-buten-1-ol-formate + NADH + O2 = oxidized Latia luciferin + NAD+ + CO2 + H2O + formate + light
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Activator in Enzyme-catalyzed Reactions (32 results)

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EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
NADP-MDH is a strictly redox-regulated, light-activated enzyme that is inactive in the dark
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required for activity, the activity is proportional to light intensity, the light effect is rapidly reversed in dark and activity remains low throughout the dark period
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light-driven activation of the molybdenum-iron-protein, MoFeP, of nitrogenase for substrate reduction is independent of ATP hydrolysis and the iron-protein, FeP, binding structure and mechanism, overview
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light-activated enzyme, activation is possible at cryogenic temperatures
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enzyme is posttranslationally activated by light. Light also has a positive effect also on de novo synthesis of nitrate reductase. Daily variations in nitrate reductase activity are mainly caused by post-translational modifications. As for angiosperms, the post-translational light activation is inhibited by 3-(3,4-dichlorophenyl)-1,1-dimethylurea, an inhibitor of photosynthesis and stomata opening
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light activates up to 1.4fold, regulation in correlation with photosynthesis
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illumination of the enzyme with white, linearly polarized light and at constant 25°C increases the enzyme activity producing a mixture of alpha-, beta-, and gamma-cyclodextrins. At a high enzyme concentration of 0.64 U/cm3, regardless the illumination time, formation of beta-cyclodextrin predominates. The highest yield of beta-cyclodextrin is afforded after 1 h illumination, but 2 h illumination leads to a significant increase in the yield of gamma-cyclodextrin
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light-dependent increase in carotinoid production
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Selective increase in the transcript abundance of GbCMK2 in the radicles by induction of light.
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light-dependent increase in PLD activity
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increases AAAD activity in retina
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stimulation
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light regime of enzyme activity
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red and blue light exposure increases gly I activity in dark-gron Amaranthus sp. indicating expression of enzyme is under stringent regulation by photoreceptors in plants
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the enzyme is light-activated
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forward reaction in chromatophores is accelerated more than 20fold during illumination with photosynthetically active light
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promotes ATP hydrolysis
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Inhibitor in Enzyme-catalyzed Reactions (9 results)

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EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
loss of 95% activity after anaerobic or aerobic photolysis
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light- and oxygen-dependent inactivation of enzyme activity in absence but not in presence of any added nitrogen source, inactivation may result from an oxidative modification of enzyme, assay in cell suspension
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above 30 lux intensity
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the activity of V8 protease is inhibited in a dose-dependent manner by exposure to laser light in the presence of light-activated antimicrobial agent methylene blue leading to degradation of the V8 protease that cannot be inhibited by the addition of a protease inhibitor
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Enzyme Kinetic Parameters

References & Links

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Links to other databases for light

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ChEBI
PubChem
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