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1.1.1.288: xanthoxin dehydrogenase

This is an abbreviated version!
For detailed information about xanthoxin dehydrogenase, go to the full flat file.

Wordmap for 1.1.1.288

Word Map on EC 1.1.1.288 Wordmap for 1.1.1.288

Reaction

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xanthoxin
+
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NAD+
=
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abscisic aldehyde
+
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NADH
+
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H+

Synonyms

ABA deficient 2, ABA2, glucose insensitive 1, Os03g0810800, SDR1, short-chain dehydrogenase/reductase1, wilty, xanthoxin oxidase, XDR

ECTree

     1 Oxidoreductases
         1.1 Acting on the CH-OH group of donors
             1.1.1 With NAD+ or NADP+ as acceptor
                EC 1.1.1.2881.1.1.288 xanthoxin dehydrogenase

General Information

General Information on EC 1.1.1.288 - xanthoxin dehydrogenase

for references in articles please use BRENDA:EC1.1.1.288

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GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
evolution
the enzyme belongs to the short-chain dehydrogenase/reductase superfamily of enzymes
malfunction
the aba2 mutant displays less seed dormancy, glucose insensitivity, small plat size, early flowering, and wiltness, no complementation by expression of AtSDR3, enotype, overview
metabolism
the enzyme is involved in the carotenoid synthesis and metabolism. Transcriptional response of different light qualities in leaf coloration of cv. Huangjinya, RNA-seq analysis with three biological replicates identifies differentially expressed genes involved in pigment metabolism pathways. With regard to porphyrin and chlorophyll metabolism, the protochlorophyllide oxidoreductase (POR) is upregulated and chlorophyllase (Chlase) is downregulated under red light (RL) compared with white light (WL), which contributes to high chlorophyll content in cv. Huangjinya. The upregulated POR and magnesium chelatase H subunit (CHLH) are identified under red + blue light (RB). Blue light (BL) significantly promotes carotenoid biosynthesis, accompanied by the related upregulated genes. But upregulated xanthoxin dehydrogenase (ABA2) reduces carotenoid content under BL. Zeaxanthin epoxidase (ZEP) is upregulated and ABA2 is downregulated under RB, resulting in high accumulation of carotenoid content. BL and RL upregulated expressions of genes involved in flavonoid biosynthesis in cv. Huangjinya. Differential expressions of genes involved in flavonoid biosynthesis is considered as the results of leaf color change. In addition, the genes related to photosynthesis are downregulated under RL, whereas these are upregulated under BL when compared with WL. In conclusion, the effect of light quality on the leaf coloration of cv. Huangjinya is mainly dependent on chlorophyll content by altering corresponding genes expressions. RL may promote the accumulation of chlorophyll in cv. Huangjinya leaves by upregulating the expression of genes related to chlorophyll synthesis (e.g. POR) and downregulating expression of genes related to chlorophyll degradation (e.g. Chlase). BL can upregulate the expression of genes related to both biosynthesis (e.g. POR, hemA) and degradation (e.g. Chlase) of chlorophyll, resulting in little change in leaf color of cv. Huangjinya under BL when compared with WL. Upregulated genes involved in chlorophyll biosynthesis (e.g. POR, CHLH) induce greener color of cv. Huangjinya treated with RB
physiological function
additional information