Catalyzes the dehydration of methylthioribulose-1-phosphate (MTRu-1-P) into 2,3-diketo-5-methylthiopentyl-1-phosphate (DK-MTP-1-P). Has an anti-apoptotic function and prevents muscle ischemic damage. Inhibits the cytochrome c-dependent and APAF1-mediated cell death.
Ubiquitously expressed with high expression in skeletal muscle, heart and kidney.
Amino-acid biosynthesis; L-methionine biosynthesis via salvage pathway; L-methionine from S-methyl-5-thio-alpha-D-ribose 1-phosphate: step 2/6.
Belongs to the aldolase class II family. MtnB subfamily.