Alkenol dehydratase variants of linalool dehydratase-isomerase

Linalool dehydratase-isomerase variant having an amino acid sequence at least 80% sequence identity to SEQ ID NO:1, wherein said variant is capable of converting at least one alkenol compound corresponding to the general formula CnH2nO into a conjugated diene CnH2n-2 with an improved activity over the activity of the amino acid sequence from which the variant is derived, wherein 3<n<7,

• and wherein said variant
• (a) is characterized in that it is capable of converting crotyl alcohol into 1,3 butadiene with a turnover rate of at least 0.033×10−3 s−1 of crotyl alcohol into 1,3 butadiene;
• or
• (b) is characterized in that it is capable of converting but-3-en-2-ol into 1,3 butadiene with a turnover rate of at least 1.1×10−4 s−1 of but-3-en-2-ol into 1,3 butadiene;
• or
• (c) is characterized in that it is capable of converting-prenol into isoprene with a turnover rate of at least 3.3×10−4 s−1 of prenol into isoprene;
• or
• (d) is characterized in that it is capable of converting isoprenol into isoprene with a turnover rate of at least 3.3×10−5 s−1 of isoprenol into isoprene.