Overview
Olefin reductase is a specialized enzyme that facilitates the reduction of carbon-carbon double bonds (olefins) to single bonds (alkanes), using reducing equivalents such as NADH or NADPH. This class of enzymes is increasingly valuable in green chemistry and industrial biotechnology due to their ability to perform selective hydrogenations under mild conditions. Unlike traditional metal-catalyzed hydrogenation, olefin reductases operate at ambient temperatures and pressures, reducing energy consumption and minimizing byproduct formation. They are typically sourced from microorganisms or engineered through protein engineering for enhanced activity and substrate range.
Physical and Chemical Properties
As a protein, olefin reductase exhibits properties common to enzymes: sensitivity to pH, temperature, and ionic strength. Optimal activity usually occurs near physiological conditions (pH 6-8, 20-40°C), though some variants are adapted to extreme environments. The enzyme's tertiary structure contains active sites that bind both the olefin substrate and cofactors like NAD(P)H. Activity is measured in units (μmol substrate converted per minute), with commercial preparations offering 1-100 U/mg specific activity. Stability varies; some formulations include stabilizers like glycerol or salts to prolong shelf life. Lyophilized powders typically retain activity for years when stored properly, while liquid forms may have shorter stability.
Main Applications
In pharmaceuticals, olefin reductases enable stereoselective synthesis of chiral intermediates, crucial for drugs like statins or antivirals. Their ability to reduce activated olefins (e.g., α,β-unsaturated carbonyls) without affecting other functional groups makes them superior to chemical catalysts for complex molecules. The biofuel industry employs these enzymes to saturate fatty acid derivatives, improving fuel stability. Emerging applications include polymer modification and flavor compound production. Engineered versions are expanding the substrate scope to include styrenes and other challenging olefins, broadening industrial utility.
Safety and Storage
While generally low-risk, olefin reductase preparations may contain trace impurities from production organisms. Use personal protective equipment (gloves, goggles) when handling, especially with powdered forms that could become airborne. Spills should be contained and cleaned with appropriate disinfectants. For storage, maintain lyophilized enzymes at -20°C or lower in sealed containers with desiccants. Liquid formulations often require refrigeration (2-8°C) and protection from light. Aliquotting minimizes freeze-thaw damage. Always verify activity after prolonged storage or shipping under suboptimal conditions.
B2B Procurement Guide
When sourcing olefin reductases, clearly define required activity (U/mg), host organism (E. coli, yeast, etc.), and preferred form (lyophilized vs. liquid). Specify if recombinant tags (His-tag, GST) are acceptable, as these affect purification needs. Batch-to-batch consistency is critical for industrial processes—request certificates of analysis with activity assays. For large-scale applications, inquire about bulk pricing and custom engineering services. Some suppliers offer immobilized enzyme preparations for continuous flow reactors. Lead times can vary (2-8 weeks) for specialty enzymes, so plan procurement accordingly. Consider testing multiple vendors for optimal price-performance ratio.
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