Peroxidase from Astragalus maritimus: purification and properties

Area of Science:

• Biochemistry
• Plant Science

Background:

• Peroxidases play crucial roles in various biological processes.
• Characterizing plant-derived enzymes is essential for understanding their functions and potential applications.

Purpose of the Study:

• To purify and characterize a peroxidase enzyme from Astragalus maritimus seeds.
• To determine the enzyme's homogeneity, molecular size, and key biochemical properties.

Main Methods:

• Enzyme purification using ammonium sulfate precipitation and DEAE-cellulose and hydroxylapatite chromatography.
• Homogeneity assessment via SDS-PAGE and analytical gel electrofocusing.
• Molecular size determination using SDS-PAGE and Sephadex gel filtration.

Main Results:

• Achieved a 255-fold purification of homogeneous peroxidase.
• Determined molecular size to be approximately 48,000-49,000 Da.
• Identified ferriprotoporphyrin IX as the prosthetic group and noted 13% neutral sugars.
• Established a pH optimum of 6.0 and an activation energy of 6 Kcal/mol.

Conclusions:

• The purified enzyme is a homogeneous peroxidase from Astragalus maritimus seeds.
• Biochemical characterization provides insights into its structure and catalytic properties.
• Further studies can explore the enzyme's specific biological roles and biotechnological potential.