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An improved method for the single-step purification of streptavidin
Journal of Biochemical and Biophysical Methods
|September 1, 1986
Summary
A novel iminobiotin affinity resin was developed for efficient streptavidin purification. This stable resin allows one-step isolation of high-purity streptavidin from bacterial culture broth.
Area of Science:
- Biochemistry
- Affinity Chromatography
Background:
- Streptavidin is a biotin-binding protein with widespread applications.
- Efficient and stable purification methods are crucial for obtaining high-quality streptavidin.
Purpose of the Study:
- To develop a more efficient and stable iminobiotin-containing resin for streptavidin isolation.
- To characterize the purification capacity and performance of the new resin.
Main Methods:
- Activation of CL-Sepharose with p-nitrophenyl chloroformate.
- Coupling of diaminohexane to form an amino-containing resin.
- Immobilization of iminobiotin using N-hydroxysuccinimide ester.
Main Results:
- The developed iminobiotin resin demonstrated a high binding capacity of 12 mg/ml for streptavidin.
- Streptavidin was purified in a single step directly from Streptomyces avidinii culture broth.
- Purified streptavidin showed a major band at 75 kDa and minor band at 150 kDa, with subunits ranging from 15-19 kDa.
Conclusions:
- The new iminobiotin affinity resin offers an efficient and stable method for streptavidin purification.
- This method simplifies the isolation process and yields high-purity biotin-binding proteins.