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Literature summary for 1.1.1.294 extracted from

  • Tanaka, R.; Tanaka, A.
    Chlorophyll cycle regulates the construction and destruction of the light-harvesting complexes (2011), Biochim. Biophys. Acta, 1807, 968-976.
    View publication on PubMed
Search for more literature for 1.1.1.294

Localization

Localization Comment Organism GeneOntology No. Textmining
membrane NYC1 isoform has three putative membrane-spanning domains, while NOL does not contain any predictable membrane-spanning domains Hordeum vulgare 16020
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membrane NYC1 isoform has three putative membrane-spanning domains, while NOL does not contain any predictable membrane-spanning domains Arabidopsis thaliana 16020
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membrane NYC1 isoform has three putative membrane-spanning domains, while NOL does not contain any predictable membrane-spanning domains Oryza sativa 16020
-

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
chlorophyllide b + NADPH + H+ Hordeum vulgare
-
 7-hydroxychlorophyllide a + NADP+
-
 ?
chlorophyllide b + NADPH + H+ Arabidopsis thaliana
-
 7-hydroxychlorophyllide a + NADP+
-
 ?
chlorophyllide b + NADPH + H+ Oryza sativa
-
 7-hydroxychlorophyllide a + NADP+
-
 ?

Organism

Organism UniProt Comment Textmining
Arabidopsis thaliana
-
 two isoforms of chlorophyll b reductase termed NYC1 and NOL, respectively
-
Hordeum vulgare
-
 two isoforms of chlorophyll b reductase termed NYC1 and NOL, respectively
-
Oryza sativa
-
 two isoforms of chlorophyll b reductase termed NYC1 and NOL, respectively
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
chlorophyllide b + NADPH + H+
-
 Hordeum vulgare 7-hydroxychlorophyllide a + NADP+
-
 ?
chlorophyllide b + NADPH + H+
-
 Arabidopsis thaliana 7-hydroxychlorophyllide a + NADP+
-
 ?
chlorophyllide b + NADPH + H+
-
 Oryza sativa 7-hydroxychlorophyllide a + NADP+
-
 ?

Synonyms

Synonyms Comment Organism
chlorophyll b reductase
-
 Hordeum vulgare
chlorophyll b reductase
-
 Arabidopsis thaliana
chlorophyll b reductase
-
 Oryza sativa

Cofactor

Cofactor Comment Organism Structure
NADPH
-
 Hordeum vulgare
NADPH
-
 Arabidopsis thaliana
NADPH
-
 Oryza sativa

General Information

General Information Comment Organism
evolution chlorophyll b reductase belongs to the short-chain dehydrogenase superfamily Hordeum vulgare
evolution chlorophyll b reductase belongs to the short-chain dehydrogenase superfamily Arabidopsis thaliana
evolution chlorophyll b reductase belongs to the short-chain dehydrogenase superfamily Oryza sativa
malfunction Arabidosis thaliana mutants lacking either NYC1 or NOL are deficient in chlorophyll b reductase activity during leaf senescence. Impairment in the chlorophyll b reduction leads to LHC stabilization during leaf senescence in the rice mutant lacking chlorophyll b reductase Arabidopsis thaliana
malfunction rice mutants lacking either NYC1 or NOL are deficient in chlorophyll b reductase activity during leaf senescence. Impairment in the chlorophyll b reduction leads to LHC stabilization during leaf senescence in the rice mutant lacking chlorophyll b reductase Oryza sativa
metabolism three enzymes participating in the chlorophyll cycle, namely, chlorophyllide a oxygenase, chlorophyll b reductase, and 7-hydroxymethylchlorophyll reductase, overview. In the reverse reactions from chlorophyll b to chlorophyll a, the 7-formyl group of chlorophyll b is first reduced to a hydroxyl group by the action of chlorophyll b reductase. The activities of chlorophyll b reductase and7-hydroxymethylchlorophyll reductase are coordinated in their regulation, otherwise, imbalance of those activities may lead to accumulation of the intermediate of the pathway. The conversion of chlorophyll b into chlorophyll a precedes the degradation of LHC during leaf senescence Hordeum vulgare
metabolism three enzymes participating in the chlorophyll cycle, namely, chlorophyllide a oxygenase, chlorophyll b reductase, and 7-hydroxymethylchlorophyll reductase, overview. In the reverse reactions from chlorophyll b to chlorophyll a, the 7-formyl group of chlorophyll b is first reduced to a hydroxyl group by the action of chlorophyll b reductase. The activities of chlorophyll b reductase and7-hydroxymethylchlorophyll reductase are coordinated in their regulation, otherwise, imbalance of those activities may lead to accumulation of the intermediate of the pathway. The conversion of chlorophyll b into chlorophyll a precedes the degradation of LHC during leaf senescence Arabidopsis thaliana
metabolism three enzymes participating in the chlorophyll cycle, namely, chlorophyllide a oxygenase, chlorophyll b reductase, and 7-hydroxymethylchlorophyll reductase, overview. In the reverse reactions from chlorophyll b to chlorophyll a, the 7-formyl group of chlorophyll b is first reduced to a hydroxyl group by the action of chlorophyll b reductase. The activities of chlorophyll b reductase and7-hydroxymethylchlorophyll reductase are coordinated in their regulation, otherwise, imbalance of those activities may lead to accumulation of the intermediate of the pathway. The conversion of chlorophyll b into chlorophyll a precedes the degradation of LHC during leaf senescence Oryza sativa
additional information rice mutants lacking either NYC1 or NOL are deficient in chlorophyll b reductase activity during leaf senescence. Recombinant NOL enzyme shows in vitro chlorophyll b reductase activity in the absence of NYC1, it is possible that NOL could function independently of NYC1. It is possible that the heterodimer formation of NYC1 and NOL is necessary only under specific developmental conditions such as leaf senescence Oryza sativa
physiological function when greening seedlings are transferred back to darkness, conversion of chlorophyll b to chlorophyll a occurs, which results in degradation of LHC and an increase in the core antenna complexes Hordeum vulgare