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Information on EC 4.4.1.29 - phycobiliprotein cysteine-84 phycobilin lyase

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IUBMB Comments
The enzyme, found in cyanobacteria and red algae, catalyses the attachment of phycobilin chromophores to cysteine 84 of several phycobiliproteins (the numbering used here corresponds to the enzyme from Anabaena, in other organisms the number may vary slightly). It can attach phycocyanobilin to the beta subunits of C-phycocyanin and phycoerythrocyanin and to both subunits of allophycocyanin. In addition, it can attach phycoerythrobilin to both subunits of C-phycoerythrin.
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The enzyme appears in viruses and cellular organisms
Reaction Schemes
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[C-phycocyanin beta-subunit]-Cys84-phycocyanobilin
=
apo-[C-phycocyanin beta-subunit]
+
[phycoerythrocyanin beta-subunit]-Cys84-phycocyanobilin
=
apo-[phycoerythrocyanin beta-subunit]
+
[allophycocyanin alpha-subunit]-Cys84-phycocyanobilin
=
apo-[allophycocyanin alpha-subunit]
+
Synonyms
alr0617, CpcS-1, CpcS-III, CpcS1, CpcSU lyase, CpcU, cpeS, CpeS1, PCB:Cys-beta84-phycobiliprotein lyase, phycobilin:cystein-84 biliprotein lyase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
[allophycocyanin alpha-subunit]-Cys84-phycocyanobilin = apo-[allophycocyanin alpha-subunit] + (2R,3E)-phycocyanobilin
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[allophycocyanin beta-subunit]-Cys84-phycocyanobilin = apo-[allophycocyanin beta-subunit] + (2R,3E)-phycocyanobilin
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[C-phycocyanin beta-subunit]-Cys84-phycocyanobilin = apo-[C-phycocyanin beta-subunit] + (2R,3E)-phycocyanobilin
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[C-phycoerythrin alpha-subunit]-Cys84-phycoerythrobilin = apo-[C-phycoerythrin alpha-subunit] + (2R,3E)-phycoerythrobilin
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[C-phycoerythrin beta-subunit]-Cys84-phycoerythrobilin = apo-[C-phycoerythrin beta-subunit] + (2R,3E)-phycoerythrobilin
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[phycoerythrocyanin beta-subunit]-Cys84-phycocyanobilin = apo-[phycoerythrocyanin beta-subunit] + (2R,3E)-phycocyanobilin
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