Ribulose bisphosphate carboxylase like proteins (RLPs) similar to B. subtilis YkrW protein, have been identified as 2,3-diketo-5-methylthiopentyl-1-phosphate enolases. They catalyze the tautomerization of 2,3-diketo-5-methylthiopentane 1-phosphate (DK-MTP 1-P). This is an important step in the methionine salvage pathway in which 5-methylthio-D-ribose (MTR) derived from 5'-methylthioadenosine is converted to methionine.
Jiyao W et al.(2023). "The conserved domain database in 2023.",