Hydrolyzes both enantiomers of 2-phosphosulfolactate. Able to hydrolyze both enantiomers of 2-hydroxycarboxylic acids with pseudosymmetric centers of inversion. Specifically hydrolyzes (S)-phospholactate and (S)-phosphoglycerate. (2R)-O-phospho-3-sulfolactate + H2O = (2R)-3-sulfolactate + phosphate Inhibited by vanadate. Optimum pH is 5.5. Optimum temperature is 75 degrees Celsius. Cofactor biosynthesis; coenzyme M biosynthesis; sulfoacetaldehyde from phosphoenolpyruvate and sulfite: step 2/4. Monomer. Belongs to the ComB family.