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Literature summary extracted from

  • Hollingshead, S.; Kopecna¡, J.; Armstrong, D.; Bucinska, L.; Jackson, P.; Chen, G.; Dickman, M.; Williamson, M.; Sobotka, R.; Hunter, C.
    Synthesis of chlorophyll-binding proteins in a fully segregated DELTAycf54 strain of the cyanobacterium Synechocystis PCC 6803 (2016), Front. Plant Sci., 7, 292 .
    View publication on PubMedView publication on EuropePMC

Activating Compound

EC Number Activating Compound Comment Organism Structure
1.14.13.81 Ycf54 protein the Ycf54 protein forms a complex with the component of the oxidative cyclase, Sll1214 (CycI, gene slr1780). Partial inactivation of the ycf54 gene leads to Chl deficiency in cyanobacteria and plants, and the complete deletion of the ycf54 gene in the cyanobacterium Synechocystis 6803 results accumulation of huge concentrations of the cyclase substrate MgPME together with 3-formyl MgPME, in the DELTAycf54 strain. The Ycf54 protein is important, but not essential, for activity of the oxidative cyclase Synechocystis sp. PCC 6803

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
1.14.13.81 magnesium-protoporphyrin IX 13-monomethyl ester + 3 NADPH + 3 H+ + 3 O2 Synechocystis sp. PCC 6803
-
 3,8-divinyl protochlorophyllide a + 3 NADP+ + 5 H2O
-
 ?

Organism

EC Number Organism UniProt Comment Textmining
1.14.13.81 Synechocystis sp. PCC 6803 P72584
-
-

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
1.14.13.81 magnesium-protoporphyrin IX 13-monomethyl ester + 3 NADPH + 3 H+ + 3 O2
-
 Synechocystis sp. PCC 6803 3,8-divinyl protochlorophyllide a + 3 NADP+ + 5 H2O
-
 ?

Synonyms

EC Number Synonyms Comment Organism
1.14.13.81 CycI
-
 Synechocystis sp. PCC 6803
1.14.13.81 Mg-protoporphyrin IX methyl ester cyclase
-
 Synechocystis sp. PCC 6803
1.14.13.81 MgPME cyclase
-
 Synechocystis sp. PCC 6803
1.14.13.81 Sll1214
-
 Synechocystis sp. PCC 6803

General Information

EC Number General Information Comment Organism
1.14.13.81 malfunction the Ycf54 protein forms a complex with the component of the oxidative cyclase, Sll1214 (CycI, gene slr1780). Partial inactivation of the ycf54 gene leads to chlorophyll deficiency in cyanobacteria and plants, and the complete deletion of the ycf54 gene in the cyanobacterium Synechocystis 6803 results accumulation of huge concentrations of the cyclase substrate MgPME together with 3-formyl MgPME, in the DELTAycf54 strain. The Ycf54 protein is important, but not essential, for activity of the oxidative cyclase. Phenotype, overview Synechocystis sp. PCC 6803
1.14.13.81 metabolism in the chlorophyll biosynthesis pathway the formation of protochlorophyllide is catalyzed by Mg-protoporphyrin IX methyl ester (MgPME) cyclase. The requirement for de novo chlorophyll molecules differs completely for each chlorophyll-binding protein Synechocystis sp. PCC 6803