Disclosed is a protein selected from:(1) a protein comprising the amino acid sequence of SEQ ID NO: 1 in the Sequence Listing;(2) a protein comprising the amino acid sequence of SEQ ID NO: 1 in the Sequence Listing with the deletion, addition, insertion and/or substitution of one or more amino acid residues, and having an alkane polyol dehydrogenase activity; or(3) a protein comprising an amino acid sequence having 80% or more identity with the amino acid sequence of SEQ ID NO: 1 in the Sequence Listing, and having an alkane polyol dehydrogenase activity.Also disclosed is a process for producing an alcohol, a ketone, an optically-active alcohol, dihydroxyacetone or a derivative thereof, using the protein.