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Information on EC 5.3.3.23 - S-methyl-5-thioribulose 1-phosphate isomerase

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IUBMB Comments
The enzyme, characterized from the bacterium Rhodospirillum rubrum, participates in methionine salvage from S-methyl-5'-thioadenosine. It is a RubisCO-like protein (RLP) that is not capable of carbon fixation, and catalyses an isomerization reaction that converts S-methyl-5-thio-D-ribulose 1-phosphate to a 3:1 mixture of S-methyl-1-thioxylulose 5-phosphate and S-methyl-1-thioribulose 5-phosphate. The reaction is an overall 1,3-proton transfer, which likely consists of two 1,2-proton transfer events.
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The expected taxonomic range for this enzyme is: Rhodospirillum rubrum
Synonyms
5-methylthioribulose-1-phosphate isomerase, ribulose-1,5-bisphosphate carboxylase/oxygenase-like protein, RLP, rlp Rru_A1998, RuBisCO-like protein, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
S-methyl-5-thio-D-ribulose 1-phosphate = S-methyl-1-thio-D-ribulose 5-phosphate
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S-methyl-5-thio-D-ribulose 1-phosphate = S-methyl-1-thio-D-xylulose 5-phosphate
show the reaction diagram
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