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EC 4.4.1.39 Details
show Brenda entryEC number
4.4.1.39
Accepted name
C-phycoerythrin α-cysteine-82 phycoerythrobilin lyase
Reaction
a [C-phycoerythrin α-subunit]-Cys82-phycoerythrobilin = apo-[C-phycoerythrin α-subunit] + (3E)-phycoerythrobilin
Other name(s)
cpeY (gene name)
Systematic name
[C-phycoerythrin α-subunit]-Cys82-phycoerythrobilin:phycoerythrobilin lyase
Comment
The enzyme, characterized from the cyanobacterium Microchaete diplosiphon, catalyses the attachment of the phycobilin chromophore (3E)-phycoerythrobilin (PEB) to cysteine 82 of the α subunit of the phycobiliprotein C-phycoerythrin. The numbering used here corresponds to the enzyme from Microchaete diplosiphon, and could vary slightly in other organisms. Activity is greatly enhanced in the presence of the chaperone-like protein CpeZ. The reaction could also be catalysed by EC 4.4.1.29, phycobiliprotein cysteine-84 phycobilin lyase, but much less efficiently.
History
created 2021
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1 Oxidoreductases
1.1 Acting on the CH-OH group of donors
4.4.1.7 created 1972, deleted 1976 4.4.1.12 created 1976, deleted 2003 4.4.1.18 created 2000, deleted 2002
