Rapid affinity purification processes for cyclodextrin glycosyltransferase from Bacillus circulans.

Area of Science:

• Biochemistry
• Enzyme Purification
• Biotechnology

Background:

• Cyclodextrin glycosyltransferase (CGTase) is an enzyme with significant industrial applications.
• Efficient and scalable purification methods are crucial for the cost-effective production of CGTase.
• Bacillus circulans is a common source organism for CGTase production.

Purpose of the Study:

• To develop rapid and scalable purification methods for cyclodextrin glycosyltransferase (CGTase).
• To compare the efficiency of affinity precipitation and aqueous two-phase partition for CGTase purification.

Main Methods:

• Development of an affinity precipitation method using starch for CGTase adsorption and elution with alpha-cyclodextrin.
• Optimization of affinity precipitation using factorial design.
• Implementation of a two-step aqueous two-phase partition procedure for CGTase purification.

Main Results:

• Affinity precipitation achieved 80% CGTase adsorption and 65% recovery with a purification factor of 17.
• Aqueous two-phase partition yielded a 72% CGTase recovery with a higher purification factor of 37.
• Both methods demonstrated rapid and easy scale-up potential.

Conclusions:

• Both affinity precipitation and aqueous two-phase partition are effective and scalable methods for CGTase purification.
• Aqueous two-phase partition offers a higher purification factor compared to affinity precipitation.
• These methods facilitate efficient recovery of cyclodextrin glycosyltransferase from Bacillus circulans.