The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme including the capability of stereospecifically reducing (R)-2-methylpentanal to (R)-2-methylpentanol. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to produce (R)-2-methylpentanol and related compounds.
