The present invention relates to a method for producing 2-hydroxyisobutyric
acid where acetone cyanohydrin is converted to 2-hydroxyisobutyric acid
using an enzyme catalyst having nitrilase activity, or having a
combination of nitrile hydratase and amidase activities. The invention
also encompasses production of methacrylic acid wherein the
2-hydroxyisobutyric acid produced with the catalyst described is
dehydrated to produce methacrylic acid.