Enzyme
The enzyme participates in the flavonoid biosynthesis pathway found in plants. It catalyses the double reduction of anthocyanidins, producing (2R,3R)-flavan-3-ol monomers required for the formation of proanthocyanidins. While the enzyme from the legume Medicago truncatula (MtANR) can use both NADPH and NADH as reductant, that from the crucifer Arabidopsis thaliana (AtANR) uses only NADPH. Also, while the substrate preference of MtANR is cyanidin>pelargonidin>delphinidin, the reverse preference is found with AtANR. cf. EC 1.3.1.112, anthocyanidin reductase [(2S)-flavan-3-ol-forming].
ANR
Enzyme
Anthocyanidin reductase
Enzyme name
EC:1.3.1.77
Entry
Oxidoreductases;Acting on the CH-CH group of donors;With NAD+ or NADP+ as acceptor
Class
(2R,3R)-flavan-3-ol:NAD(P)+ 3,4-oxidoreductase
Sysname
a (2R,3R)-flavan-3-ol + 2 NAD(P)+ = an anthocyanidin with a 3-hydroxy group + 2 NAD(P)H + H+ [RN:R07351 R07352]
Reaction
anthocyanidin with a 3-hydroxy group [CPD:C21381];NADH [CPD:C00004];NADPH [CPD:C00005];H+ [CPD:C00080]
Product

Species information
Amaranthus hypochondriacus
Species name
Grain amaranth (Amaranthus hypochondriacus) is a species of eudicot in the family Amaranthaceae (amaranth family).
Species info

Gene sequence info
Amaranthus_hypochondriacus.ANR.fa
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>AH000599-RA.v2.1
MAEENSKSSRYCKVCVTGGAGYIASSLIKHLLNNGSYFVHATLRNLGDTEKLSRLTKLPGAEKRLKVFEADLNNPQQFEAAIRDCQFVFHLASPFVFPKDSQFKDISEAAIASVKGIAKLCIESGTVKRLIYTASVVSVSPLKDDANAFMDFIDETCWTPLHIPLVTSSIHKDYVITKTEAERALLKLEEGSRMEVVTLALGLVGGEASRSQYHEHSSTAIIVSQLTKSEFGKNALKFLEQLLGKLPILHIEDVCEALIFSMLKDSLHGRFLCASDYVSSAEIAQYFHINYPEFQVQHVHMDGPTNRNIKWASTKLIDEGFKYNHDMKSILDDSLKNVRKFNGL
>AH001617-RA.v2.1
MDKKLQNKGKVCVTGASGFVASWLVKRLLSSGYFVVGTVRDPGDAKKLEHLWGLEGAKERLKLVKADLMEEGSFDEAIMGCEGVFHTASPVVGISSNPKIEILEPAVKGTLNVLESCKKNPSLRRVVLTSSSSTAEKAAWEFCKENNIDLVTILPAFVIGPSLPPNLCSTASDVLGLFKGETSKFEFHGRMGYIHIDDIALCHILVYEHKDAHGRYLCSSTVMEHYELASFLASRYPSYPIPRSFTKLDRPSYTYNTSKIESLGFKFKTMEEMFDDCLNSLIMQGHL
>AH007726-RA.v2.1
MNNDVSDDERKVGHLKMLEGAEERLKVFKADLMEEGSFDSAISGCHGVFHTASPVTFTFNDPQGEILDPAMKGTLNVLTSLLVQKWYRISKTLAEEAAWKFVKEHGIDMVSINPSAVIGAETFANATFGWVNVKDVATAHILAFEVPSASGRYVLVENVAHCSEIVKILQELYPKLTLPNRCEDNEPFVPKFQVSTERAKSLGINFIPLKLSLKETVENLKERGYVRF
>AH010980-RA.v2.1
MEQIISERNNKRVCVTGASGFIASWLVKLLLHRGYVVNATVRNLNDPAKTEHLLALEGAKERLHLFEANLSKEGSFDSAIYGCEGVFHTASPLIFFSDNPQAEVINPAVNGTLNVLASCVRATSVKRVIFTSSTAAVVHNGQPLTNETECYLLSKTLAETAAWKFAKENGIDMISLCLPAVIDVAEAHIRAFEIPSANGRCDDDGPLEATYKISQEKAKTLGIDEYIPLKVALKETVECLKEKGMVTF
>AH010979-RA.v2.1
MDELTRRKVCVTGASGFVASWIVKLLLQSGYVVNATVRDPSDPKKTEHLMELEGAKERLNLFKAELMEEGSFDSAVAGCEEEAAWKFVKENEIDMVCMNPTMTIGPILQPTLNESVASLLNLINGASGYIASWLVKLLLSHGYTVNATVRNPHDSTKVEHLLGFEGAHERLNLFKADLMEEGSFDSAISGCDGVFHTASPLLFTVTDPQVDVLDPAIKGTLNVLTSCKKFPSVKRVILTSSLAAVLFTGKPRTPEVVVDESWFSDPEFCKESVLMWYTISKTLAEDSAWKFVKEHCIDMISINPGVVIGPMLQPQLNSSVAIILNLINGAETYPNAAFCYVHVKDVAIAHILAFESPSASGRYVMVETVAHISETVNALQELAKRGYFTVYQSTCATGFIASWLVKLLLQRGYTVNATVRAPNDLKKAEHLLGLEGAEERLHLFKADLLEEGSFDSAISGCHGVFHAACPVLTTVKNPQADVLDPAIKGTLNVLTSCKKFPSVRRVILTSSMSAVVFTGKPLGPDVVIDESWFSDPEFCKESSFMWYTLAKTLAEDTAWKFVKEHCMDMISINPGVVIGPMLQPNLNSSVTRIFDLVNGEKTYPNESFGYVHVKDVAMAHILGFEVPSASGRYLLVEYVAHFSETVDILQKLYPKLTIPNRCADDKPFEPTYQVSKEKVKSLGINYIPFQISLKDTVDTFKEKGFVSF
>AH015195-RA.v2.1
MDGLAHHCDHQEKKVKKACIIGGTGFVASFLIKLLLNNGYSANLTDEGSFDAAIEGCDIVFLVATPVNFASEDPENDMIKPAVQGVVNVLTSCAKLKCVKRVVMTSSAAAVSINNLTGDGLVMNEDNWTNGYPVSKTLAERAAWKFAKENKIDLITVIPSLITGASDTPQIPRNESLINGMKGMQSLSGSISVTHVEDVCRAHIYVAEKESASGRYICCAVNTNIVDLANFLVNKYPYPLYNLPNESFEEFPSKAKLILSSDKLIKEGFQFKYGIEQIYDSTVEYLKTKGLLKD
MAEENSKSSRYCKVCVTGGAGYIASSLIKHLLNNGSYFVHATLRNLGDTEKLSRLTKLPGAEKRLKVFEADLNNPQQFEAAIRDCQFVFHLASPFVFPKDSQFKDISEAAIASVKGIAKLCIESGTVKRLIYTASVVSVSPLKDDANAFMDFIDETCWTPLHIPLVTSSIHKDYVITKTEAERALLKLEEGSRMEVVTLALGLVGGEASRSQYHEHSSTAIIVSQLTKSEFGKNALKFLEQLLGKLPILHIEDVCEALIFSMLKDSLHGRFLCASDYVSSAEIAQYFHINYPEFQVQHVHMDGPTNRNIKWASTKLIDEGFKYNHDMKSILDDSLKNVRKFNGL
>AH001617-RA.v2.1
MDKKLQNKGKVCVTGASGFVASWLVKRLLSSGYFVVGTVRDPGDAKKLEHLWGLEGAKERLKLVKADLMEEGSFDEAIMGCEGVFHTASPVVGISSNPKIEILEPAVKGTLNVLESCKKNPSLRRVVLTSSSSTAEKAAWEFCKENNIDLVTILPAFVIGPSLPPNLCSTASDVLGLFKGETSKFEFHGRMGYIHIDDIALCHILVYEHKDAHGRYLCSSTVMEHYELASFLASRYPSYPIPRSFTKLDRPSYTYNTSKIESLGFKFKTMEEMFDDCLNSLIMQGHL
>AH007726-RA.v2.1
MNNDVSDDERKVGHLKMLEGAEERLKVFKADLMEEGSFDSAISGCHGVFHTASPVTFTFNDPQGEILDPAMKGTLNVLTSLLVQKWYRISKTLAEEAAWKFVKEHGIDMVSINPSAVIGAETFANATFGWVNVKDVATAHILAFEVPSASGRYVLVENVAHCSEIVKILQELYPKLTLPNRCEDNEPFVPKFQVSTERAKSLGINFIPLKLSLKETVENLKERGYVRF
>AH010980-RA.v2.1
MEQIISERNNKRVCVTGASGFIASWLVKLLLHRGYVVNATVRNLNDPAKTEHLLALEGAKERLHLFEANLSKEGSFDSAIYGCEGVFHTASPLIFFSDNPQAEVINPAVNGTLNVLASCVRATSVKRVIFTSSTAAVVHNGQPLTNETECYLLSKTLAETAAWKFAKENGIDMISLCLPAVIDVAEAHIRAFEIPSANGRCDDDGPLEATYKISQEKAKTLGIDEYIPLKVALKETVECLKEKGMVTF
>AH010979-RA.v2.1
MDELTRRKVCVTGASGFVASWIVKLLLQSGYVVNATVRDPSDPKKTEHLMELEGAKERLNLFKAELMEEGSFDSAVAGCEEEAAWKFVKENEIDMVCMNPTMTIGPILQPTLNESVASLLNLINGASGYIASWLVKLLLSHGYTVNATVRNPHDSTKVEHLLGFEGAHERLNLFKADLMEEGSFDSAISGCDGVFHTASPLLFTVTDPQVDVLDPAIKGTLNVLTSCKKFPSVKRVILTSSLAAVLFTGKPRTPEVVVDESWFSDPEFCKESVLMWYTISKTLAEDSAWKFVKEHCIDMISINPGVVIGPMLQPQLNSSVAIILNLINGAETYPNAAFCYVHVKDVAIAHILAFESPSASGRYVMVETVAHISETVNALQELAKRGYFTVYQSTCATGFIASWLVKLLLQRGYTVNATVRAPNDLKKAEHLLGLEGAEERLHLFKADLLEEGSFDSAISGCHGVFHAACPVLTTVKNPQADVLDPAIKGTLNVLTSCKKFPSVRRVILTSSMSAVVFTGKPLGPDVVIDESWFSDPEFCKESSFMWYTLAKTLAEDTAWKFVKEHCMDMISINPGVVIGPMLQPNLNSSVTRIFDLVNGEKTYPNESFGYVHVKDVAMAHILGFEVPSASGRYLLVEYVAHFSETVDILQKLYPKLTIPNRCADDKPFEPTYQVSKEKVKSLGINYIPFQISLKDTVDTFKEKGFVSF
>AH015195-RA.v2.1
MDGLAHHCDHQEKKVKKACIIGGTGFVASFLIKLLLNNGYSANLTDEGSFDAAIEGCDIVFLVATPVNFASEDPENDMIKPAVQGVVNVLTSCAKLKCVKRVVMTSSAAAVSINNLTGDGLVMNEDNWTNGYPVSKTLAERAAWKFAKENKIDLITVIPSLITGASDTPQIPRNESLINGMKGMQSLSGSISVTHVEDVCRAHIYVAEKESASGRYICCAVNTNIVDLANFLVNKYPYPLYNLPNESFEEFPSKAKLILSSDKLIKEGFQFKYGIEQIYDSTVEYLKTKGLLKD
Gene tree
Gene tree

Sheng jun & Dong yang Teams, Yunnan agriculture University