Engineered Alcohol Dehydrogenase Methanol Conversion

The patent applies parameter changes by modifying specific amino acid residues in the alcohol dehydrogenase sequence. Mutations at positions corresponding to 145, 146, 147, 148, 149, 150, 161, 162, and 163 in the MDH 2315A sequence are designed to improve catalytic activity. These parameter changes at the molecular level result in at least 2-fold increase in conversion rate while maintaining the overall enzyme structure.

The patent implements local quality by making targeted mutations at specific positions within the enzyme sequence rather than changing the entire structure. The mutations are localized to regions that interact with substrate or cofactor, such as positions affecting NAD+ binding or catalytic activity. This allows improvement in conversion rate while keeping the rest of the enzyme structure simple and unchanged.

The patent uses parameter changes to improve methanol utilization efficiency, enabling the engineered enzymes to function effectively with methanol as a sole or primary carbon source. This eliminates or reduces the need for expensive additional carbon sources like glucose, thereby lowering production costs. The mutations are designed to optimize substrate binding and catalytic efficiency for cost-effective manufacturing.

The engineered alcohol dehydrogenases enable the production system to be self-sufficient by using methanol as the primary or sole carbon source. The enzyme mutations improve methanol conversion efficiency to the point where additional expensive carbon sources are no longer needed, making the system self-service and reducing dependency on external supplements.

The patent applies parameter changes by mutating specific amino acid positions to enhance catalytic efficiency and product yield. The mutations at defined positions in the enzyme sequence result in at least 2-fold increase in conversion rate and product yield. The changes are limited to specific residues that directly affect catalytic function, maintaining overall structural simplicity.

The patent implements local quality by making targeted mutations at specific positions that directly influence product yield, such as residues involved in substrate binding, catalysis, or product release. This localized modification approach improves product yield without requiring complex global restructuring of the enzyme, thereby limiting the increase in overall complexity.

The patent applies parameter changes by systematically mutating amino acid residues at positions known to affect methanol dehydrogenase activity. The mutations are designed to enhance substrate binding affinity, catalytic turnover, or cofactor interaction. These parameter changes result in at least 2-fold increase in methanol conversion rate while maintaining reasonable engineering complexity through focused modifications.

The patent implements local quality by targeting specific residues that directly influence methanol utilization, such as those in the active site or substrate binding pocket. By making localized mutations rather than global changes, the patent achieves improved methanol utilization with minimal increase in overall enzyme engineering complexity.