Enzyme
In addition to the desaturation of (2R,3R)-dihydroflavonols to flavonols, the enzyme from Citrus unshiu (satsuma mandarin) also has a non-specific activity that trans-hydroxylates the flavanones (2S)-naringenin and the unnatural (2R)-naringenin at C-3 to kaempferol and (2R,3R)-dihydrokaempferol, respectively [2]. Requires Fe2+.
FLS
Enzyme
Flavonol synthase
Enzyme name
EC:1.14.20.6
Entry
Oxidoreductases;Acting on paired donors, with incorporation or reduction of molecular oxygen;With 2-oxoglutarate as one donor, and the other dehydrogenated
Class
dihydroflavonol,2-oxoglutarate:oxygen oxidoreductase
Sysname
a dihydroflavonol + 2-oxoglutarate + O2 = a flavonol + succinate + CO2 + H2O [RN:R07368]
Reaction
flavonol [CPD:C01495];succinate [CPD:C00042];CO2 [CPD:C00011];H2O [CPD:C00001]
Product

Species information
Corylus mandshurica
Species name
Corylus mandshurica is a species of eudicot in the family Betulaceae (birch family).
Species info

Gene sequence info
Corylus_mandshurica.FLS.fa
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>CmaG0002570.1
MDVQRVQALAFGGLKELPEQFIRPAHERPENSKAMEGVIVPVISLSQPHDVLVKQVALACQEWGFFLVTDHGLSPSLIQRLQEVGQEFFRLPQEEKEAYANDAATGKFEGYGTKMTKNSDEKVEWIDYFFHFMSPPSKVNYGIWPQNPPAYREVTEEYNKEMVRITEELLVLLSEGLGLEGKVLKSSLRDEEMEVEMKINMYPPCPQPQLALGVEPHTDMSALTLLVPNDVPGLQVSKDGNWVAVDYFPNALFVHVGDQIEVLSNGKYKSVLHRSLVNKERTRMSWAVFIAPPLEATIGPLPQLVNDENPPKYSTKTYAEYRYRKFNKLPQ
>CmaG0000370.1
MDLPVIDLTVYLALTDEINGDPSTLTERVGPELSGLCREVSRVLRETGALLVKDPRCTAEDNDRFIDMMEQYFERPADFKRLQERPALHYQVGVTPEGVEVPRSLVDEEMQEKLREMPKGFQPATPVGPDRKWRYMWRVGPRPSNTRFQELNSEPVIPEGFPEWKDTMDSWGHKMISAIEVVAEMAAIGFGLPKDAFTSLMKQGPHLLAPTGSDLRLYGQEGTVFAGYHYDLNFLTIHGRSRFPGLNIWLRNGQKVEVKVPVGCLLIQTGKQIEWLTAGDCIAGMHEVVVTNRTIEAIKVASEQNRSLWRVSSTLFAHIASDAVLNPLGHFAESPLASKYPPMCAGEFVEQELAVINLKGTKENVNDL
>CmaG0002576.1
MGLERVQDVASLSKDEIPAEFIRSVNEQPGITTVHGEVLEVPTIDMADPDEEKVLRAIVDASRDWGMFQIVNHGVPVEAIAKLQAVGKEFFELPPEEKEVYAKPPGQSVEGYGTKLQKEVEGKKAWVDHLFHNIWPPSAINYRFWPKNPPSYREANEEYANHMHGVVEKLFKSLSLGLGLEGHELKEAAGGDDLVYLLKINYYPPCPRPDLALGVPAHTDMSAFTILVPNHVQGLQAFRDAHWYDVKYIPNAFVIHIGDQLEILSNGKYKSVLHRTTVNKEHTRMSWPVFLEPSPDFVVGPHPKLIDHENPPKYKTKKYGDYVYCKLNKIPQ
>CmaG0002571.1
MVRISDELLELLSEGLGLEGKVLKSSLRDEEMEVEMKINMYPPCPQPQLALGVEPHTDMSALTLLVPNDVPGLQVSKDGKWVAVDYIPNALFVHVGDQIEVLSNGKYKSVLHRSLVNKERTRMSWAVFIVPPQEATIGPLPQLVDDQNPPKYSTKTYAEYRYRKFNKLPQ
>CmaG0002572.1
MDVQRVQALAFGGLKELPEQFIRPAHERPENSKAVEGVSVPVISLSQPHDVLVKQVALACQEWGFFLVTDHDLLPSLIQRLQEVGQEFFRLPQEEKEAYANDAATGKFEGYGTKMTKNSDEKVEWIDYFFHFMSPPSKVNYAYVKVLVCFKNETYMYLIV
>CmaG0002573.1
MDVQRVQALAFGGLKELPEQFIRPAHERPENSKAVEGVSVPVISLSQPHDVLVKQVALACQEWGFFLVTDHGLSPSLIQRLQEVSQEFFWLPQEEKEAYANDAATGKFEGYGTKMTKNSDEKVEWIDYFFHFMSPPSKVNYGIWPQNPSAYREVTEEYNKEVVRLSDELLELLSEGLGLEGKVLKSSLRDEEMEVEMKINMYPPCPQPQLALGVEPHTDMSALTLLVPNDVPGLQVSKDGKWVAVDYIPNALFVHVGDQIEVLSNGKYKSVLHRSLVNKERTRMSWAVFIAPPLEATIGPLPQLVNDENPPKYSTKTYAEYRYRKFNKLPQ
>CmaG0023924.1
MEVQSVQAIAFSSLTTNTIPAEFIRPEKEQPALTTFRGPAPEIPTVDLCDPDLGNLVRLIANASKEWGIFQVVNHGIPSDVISNLQAVGKQFFELPQEEKEAYAKPCGAQSVEGYGNKLQKDPDGKKAWVDHLFHRTWPPSVVNYRFWPKNPPSYREANEVYANYVREVADKLFTCLSLGLGLRGDALKEAGGGEEMVFLMKINYYPPCPQPDLTLGVVAHTDFSALTLLVPNEVPGLQVLKDDRWIDAKYIPNALIVHIGDQIEIMSNGKYRSVLHRSTVNKEKARMSWPVFLEPPAEFVVGPVPELVNEENPPKYKPKKFKDYAFCKLNKLPQ
>CmaG0007237.1
MSENPIDFRAPPPSPIAAGRRSTVTNDEILTEFLHHSLRVPDLVLPDKVFPRQKFIESPPVIDFQFLNSKESDPIRKILDCIPGTGCFQLVNHGIPPETIGAALAAATGVFRVSMEKKAVVTRSLERPYGFEEGHGDEGESELSEEFVWCRDEGLKLKMEGIWPLGEKMETLLWEIEKVSEKILLALWESSLRRSICGNDLIHGQEVGSVCCLYKHSRNVPADRWYDVIRMLIRGTDFSHALCLHVCDGASEFHVYSKKGWVSFIPDKGALIITVGDQIQALLSGGNYKHVIGRPIFEDEKEDCISMAFLYSPPSTINTSYSKANREKSVSLGQQALVALVLTLVYQFLAYIFKKF
MDVQRVQALAFGGLKELPEQFIRPAHERPENSKAMEGVIVPVISLSQPHDVLVKQVALACQEWGFFLVTDHGLSPSLIQRLQEVGQEFFRLPQEEKEAYANDAATGKFEGYGTKMTKNSDEKVEWIDYFFHFMSPPSKVNYGIWPQNPPAYREVTEEYNKEMVRITEELLVLLSEGLGLEGKVLKSSLRDEEMEVEMKINMYPPCPQPQLALGVEPHTDMSALTLLVPNDVPGLQVSKDGNWVAVDYFPNALFVHVGDQIEVLSNGKYKSVLHRSLVNKERTRMSWAVFIAPPLEATIGPLPQLVNDENPPKYSTKTYAEYRYRKFNKLPQ
>CmaG0000370.1
MDLPVIDLTVYLALTDEINGDPSTLTERVGPELSGLCREVSRVLRETGALLVKDPRCTAEDNDRFIDMMEQYFERPADFKRLQERPALHYQVGVTPEGVEVPRSLVDEEMQEKLREMPKGFQPATPVGPDRKWRYMWRVGPRPSNTRFQELNSEPVIPEGFPEWKDTMDSWGHKMISAIEVVAEMAAIGFGLPKDAFTSLMKQGPHLLAPTGSDLRLYGQEGTVFAGYHYDLNFLTIHGRSRFPGLNIWLRNGQKVEVKVPVGCLLIQTGKQIEWLTAGDCIAGMHEVVVTNRTIEAIKVASEQNRSLWRVSSTLFAHIASDAVLNPLGHFAESPLASKYPPMCAGEFVEQELAVINLKGTKENVNDL
>CmaG0002576.1
MGLERVQDVASLSKDEIPAEFIRSVNEQPGITTVHGEVLEVPTIDMADPDEEKVLRAIVDASRDWGMFQIVNHGVPVEAIAKLQAVGKEFFELPPEEKEVYAKPPGQSVEGYGTKLQKEVEGKKAWVDHLFHNIWPPSAINYRFWPKNPPSYREANEEYANHMHGVVEKLFKSLSLGLGLEGHELKEAAGGDDLVYLLKINYYPPCPRPDLALGVPAHTDMSAFTILVPNHVQGLQAFRDAHWYDVKYIPNAFVIHIGDQLEILSNGKYKSVLHRTTVNKEHTRMSWPVFLEPSPDFVVGPHPKLIDHENPPKYKTKKYGDYVYCKLNKIPQ
>CmaG0002571.1
MVRISDELLELLSEGLGLEGKVLKSSLRDEEMEVEMKINMYPPCPQPQLALGVEPHTDMSALTLLVPNDVPGLQVSKDGKWVAVDYIPNALFVHVGDQIEVLSNGKYKSVLHRSLVNKERTRMSWAVFIVPPQEATIGPLPQLVDDQNPPKYSTKTYAEYRYRKFNKLPQ
>CmaG0002572.1
MDVQRVQALAFGGLKELPEQFIRPAHERPENSKAVEGVSVPVISLSQPHDVLVKQVALACQEWGFFLVTDHDLLPSLIQRLQEVGQEFFRLPQEEKEAYANDAATGKFEGYGTKMTKNSDEKVEWIDYFFHFMSPPSKVNYAYVKVLVCFKNETYMYLIV
>CmaG0002573.1
MDVQRVQALAFGGLKELPEQFIRPAHERPENSKAVEGVSVPVISLSQPHDVLVKQVALACQEWGFFLVTDHGLSPSLIQRLQEVSQEFFWLPQEEKEAYANDAATGKFEGYGTKMTKNSDEKVEWIDYFFHFMSPPSKVNYGIWPQNPSAYREVTEEYNKEVVRLSDELLELLSEGLGLEGKVLKSSLRDEEMEVEMKINMYPPCPQPQLALGVEPHTDMSALTLLVPNDVPGLQVSKDGKWVAVDYIPNALFVHVGDQIEVLSNGKYKSVLHRSLVNKERTRMSWAVFIAPPLEATIGPLPQLVNDENPPKYSTKTYAEYRYRKFNKLPQ
>CmaG0023924.1
MEVQSVQAIAFSSLTTNTIPAEFIRPEKEQPALTTFRGPAPEIPTVDLCDPDLGNLVRLIANASKEWGIFQVVNHGIPSDVISNLQAVGKQFFELPQEEKEAYAKPCGAQSVEGYGNKLQKDPDGKKAWVDHLFHRTWPPSVVNYRFWPKNPPSYREANEVYANYVREVADKLFTCLSLGLGLRGDALKEAGGGEEMVFLMKINYYPPCPQPDLTLGVVAHTDFSALTLLVPNEVPGLQVLKDDRWIDAKYIPNALIVHIGDQIEIMSNGKYRSVLHRSTVNKEKARMSWPVFLEPPAEFVVGPVPELVNEENPPKYKPKKFKDYAFCKLNKLPQ
>CmaG0007237.1
MSENPIDFRAPPPSPIAAGRRSTVTNDEILTEFLHHSLRVPDLVLPDKVFPRQKFIESPPVIDFQFLNSKESDPIRKILDCIPGTGCFQLVNHGIPPETIGAALAAATGVFRVSMEKKAVVTRSLERPYGFEEGHGDEGESELSEEFVWCRDEGLKLKMEGIWPLGEKMETLLWEIEKVSEKILLALWESSLRRSICGNDLIHGQEVGSVCCLYKHSRNVPADRWYDVIRMLIRGTDFSHALCLHVCDGASEFHVYSKKGWVSFIPDKGALIITVGDQIQALLSGGNYKHVIGRPIFEDEKEDCISMAFLYSPPSTINTSYSKANREKSVSLGQQALVALVLTLVYQFLAYIFKKF
Gene tree
Gene tree

Sheng jun & Dong yang Teams, Yunnan agriculture University