Biotransformation of Rutin Using Crude Enzyme from Rhodopseudomonas palustris

Area of Science:

• Microbiology
• Biochemistry
• Enzymology

Background:

• Rhodopseudomonas palustris exhibits deglycosylation activity on diglycosylated flavonoids.
• Flavonoids, including rutin, possess significant therapeutic properties.
• Efficient biotransformation methods are needed for valuable flavonoid derivatives.

Purpose of the Study:

• To investigate the biotransformation of rutin using a crude enzyme from Rhodopseudomonas palustris.
• To identify the products of rutin biotransformation.
• To determine optimal conditions for the enzymatic conversion.

Main Methods:

• Cultivation of Rhodopseudomonas palustris in flavonoid-based media.
• Preparation of a crude enzyme extract.
• Enzymatic assay to transform rutin under varying pH, temperature, and substrate concentrations.
• Analysis of biotransformation products using analytical techniques.

Main Results:

• The crude enzyme transformed rutin into isoquercitrin and subsequently to quercetin.
• Optimal enzyme activity was observed at pH 7.0 and 25°C.
• Maximum rutin concentration for optimal activity was 1.0 mg/mL.
• Under optimal conditions, rutin was biotransformed into isoquercitrin and quercetin within 21 hours.

Conclusions:

• Rhodopseudomonas palustris crude enzyme offers an eco-friendly and potentially economical route for rutin biotransformation.
• This enzymatic process can be a viable method for the industrial production of isoquercitrin and quercetin.
• The study highlights a novel biotransformation pathway for valuable flavonoids.