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- Carotenoid_oxygenase abstract "Carotenoid oxygenases are a family of enzymes involved in the cleavage of carotenoids to produce, for example, retinol, commonly known as vitamin A. This family includes a receptor which is abundantly expressed in retinal pigment epithelium, and binds plasma retinal binding protein.Carotenoids such as beta-carotene, lycopene, lutein and beta-cryptoxanthine are produced in plants and certain bacteria, algae and fungi, where they function as accessory photosynthetic pigments and as scavengers of oxygen radicals for photoprotection. They are also essential dietary nutrients in animals. Carotenoid oxygenases cleave a variety of carotenoids into a range of biologically important products, including apocarotenoids in plants that function as hormones, pigments, flavours, floral scents and defence compounds, and retinoids in animals that function as vitamins, visual pigments and signalling molecules. Examples of carotenoid oxygenases include: Beta-carotene 15,15'-monooxygenase (BCDO1; EC 1.14.99.36) from animals, which cleaves beta-carotene symmetrically at the central double bond to yield two molecules of retinal. Beta-carotene-9',10'-dioxygenase (BCDO2) from animals, which cleaves beta-carotene asymmetrically to apo-10'-beta-carotenal and beta-ionone, the latter being converted to retinoic acid. Lycopene is also oxidatively cleaved. 9-cis-epoxycarotenoid dioxygenase from plants, which cleaves 9-cis xanthophylls to xanthoxin, a precursor of the hormone abscisic acid. Apocarotenoid-15,15'-oxygenase from bacteria and cyanobacteria, which converts beta-apocarotenals rather than beta-carotene into retinal. This protein has a seven-bladed beta-propeller structure with four hisitidines that hold the iron active centre. Retinal pigment RPE65 from animals, which in its soluble form binds all-trans retinol, and in its membrane-bound form binds all-trans retinyl esters. RPE65 is important for the production of 11-cis retinal during visual pigment regeneration.↑ ↑ 2.0 2.1 2.2 ↑ ↑ ↑".
- Carotenoid_oxygenase symbol "RPE65".
- Carotenoid_oxygenase thumbnail PDB_1bix_EBI.jpg?width=300.
- Carotenoid_oxygenase wikiPageExternalLink Page1.htm.
- Carotenoid_oxygenase wikiPageExternalLink pdb66_1.html.
- Carotenoid_oxygenase wikiPageID "4152952".
- Carotenoid_oxygenase wikiPageRevisionID "590862260".
- Carotenoid_oxygenase caption "The Structure of a Retinal-Forming Carotenoid Oxygenase.".
- Carotenoid_oxygenase hasPhotoCollection Carotenoid_oxygenase.
- Carotenoid_oxygenase interpro "IPR004294".
- Carotenoid_oxygenase name "Retinal pigment epithelial membrane protein".
- Carotenoid_oxygenase opmFamily "111".
- Carotenoid_oxygenase opmProtein "2".
- Carotenoid_oxygenase pdb "D:7-490 B:7-490".
- Carotenoid_oxygenase pfam "PF03055".
- Carotenoid_oxygenase scop "2".
- Carotenoid_oxygenase symbol "RPE65".
- Carotenoid_oxygenase subject Category:Bioindicators.
- Carotenoid_oxygenase subject Category:Carotenoids.
- Carotenoid_oxygenase subject Category:Enzymes.
- Carotenoid_oxygenase subject Category:Peripheral_membrane_proteins.
- Carotenoid_oxygenase subject Category:Photosynthesis.
- Carotenoid_oxygenase subject Category:Protein_domains.
- Carotenoid_oxygenase subject Category:Protein_families.
- Carotenoid_oxygenase type Abstraction100002137.
- Carotenoid_oxygenase type Activator114723079.
- Carotenoid_oxygenase type Antioxidant114724645.
- Carotenoid_oxygenase type Attribute100024264.
- Carotenoid_oxygenase type Carotenoid114720962.
- Carotenoid_oxygenase type Carotenoids.
- Carotenoid_oxygenase type Catalyst114723628.
- Carotenoid_oxygenase type Chemical114806838.
- Carotenoid_oxygenase type ColoringMaterial114984973.
- Carotenoid_oxygenase type Compound114818238.
- Carotenoid_oxygenase type Environment113934596.
- Carotenoid_oxygenase type Enzyme114732946.
- Carotenoid_oxygenase type Enzymes.
- Carotenoid_oxygenase type Inhibitor114724436.
- Carotenoid_oxygenase type Macromolecule114944888.
- Carotenoid_oxygenase type Material114580897.
- Carotenoid_oxygenase type Matter100020827.
- Carotenoid_oxygenase type Molecule114682133.
- Carotenoid_oxygenase type OrganicCompound114727670.
- Carotenoid_oxygenase type Part113809207.
- Carotenoid_oxygenase type PeripheralMembraneProteins.
- Carotenoid_oxygenase type PhysicalEntity100001930.
- Carotenoid_oxygenase type Phytochemical114983143.
- Carotenoid_oxygenase type Pigment114989820.
- Carotenoid_oxygenase type Protein114728724.
- Carotenoid_oxygenase type ProteinDomains.
- Carotenoid_oxygenase type Relation100031921.
- Carotenoid_oxygenase type Situation113927383.
- Carotenoid_oxygenase type Sphere114514039.
- Carotenoid_oxygenase type State100024720.
- Carotenoid_oxygenase type Substance100019613.
- Carotenoid_oxygenase type Substance100020090.
- Carotenoid_oxygenase type Thing100002452.
- Carotenoid_oxygenase type Unit109465459.
- Carotenoid_oxygenase type Biomolecule.
- Carotenoid_oxygenase type Protein.
- Carotenoid_oxygenase type BiologicalObject.
- Carotenoid_oxygenase comment "Carotenoid oxygenases are a family of enzymes involved in the cleavage of carotenoids to produce, for example, retinol, commonly known as vitamin A.".
- Carotenoid_oxygenase label "Carotenoid oxygenase".
- Carotenoid_oxygenase sameAs m.0blzn1.
- Carotenoid_oxygenase sameAs Q5045535.
- Carotenoid_oxygenase sameAs Q5045535.
- Carotenoid_oxygenase sameAs Carotenoid_oxygenase.
- Carotenoid_oxygenase wasDerivedFrom Carotenoid_oxygenase?oldid=590862260.
- Carotenoid_oxygenase depiction PDB_1bix_EBI.jpg.
- Carotenoid_oxygenase isPrimaryTopicOf Carotenoid_oxygenase.