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4.4.1.31: phycoerythrocyanin alpha-cysteine-84 phycoviolobilin lyase/isomerase

This is an abbreviated version!
For detailed information about phycoerythrocyanin alpha-cysteine-84 phycoviolobilin lyase/isomerase, go to the full flat file.

Word Map on EC 4.4.1.31

Reaction

[phycoerythrocyanin alpha-subunit]-Cys84-phycoviolobilin
=
apo-[phycoerythrocyanin alpha-subunit]
 +
(2R,3E)-phycocyanobilin

Synonyms

PEC-Cys-R84 PCB lyase/isomerase, pecE, PecE/F, PecE/PecF, pecF, phycoviolobilin phycoerythrocyanin-alpha84-cystein-lyase, PVBPEC-lyase, RpcG

ECTree

     4 Lyases
         4.4 Carbon-sulfur lyases
             4.4.1 Carbon-sulfur lyases (only sub-subclass identified to date)
                4.4.1.31 phycoerythrocyanin alpha-cysteine-84 phycoviolobilin lyase/isomerase

Activating Compound

Activating Compound on EC 4.4.1.31 - phycoerythrocyanin alpha-cysteine-84 phycoviolobilin lyase/isomerase

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ACTIVATING COMPOUND
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
2-mercaptoethanol
2-mercaptoethanol or thiols like such as dithiothreitol are required for the isomerization reaction of the lyase: without, only the phycocyanobilin addition product is formed, but no [phycoerythrocyanin alpha-subunit]-Cys84-phycoviolobilin. Too much 2-mercaptoethanol will cause the loss of chromophore, in a reaction requiring oxygen. When Mg2+ is used as the activator, the optimal concentration of 2-mercaptoethanol is 5 mM, with Mn2+ it is 3 mM
dithiothreitol
2-mercaptoethanol or thiols like such as dithiothreitol are required for the isomerization reaction of the lyase: without, only the phycocyanobilin addition product is formed, but no [phycoerythrocyanin alpha-subunit]-Cys84-phycoviolobilin