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Pseudo-affinity column chromatography based rapid purification procedure for T7 RNA polymerase
1Biophysics Division, Saha Institute of Nuclear Physics, Calcutta, India.
Preparative Biochemistry & Biotechnology
|November 7, 1998
Summary
Researchers developed a rapid purification method for T7 RNA polymerase (RNAP) using cibacron blue affinity chromatography. This technique efficiently isolates pure T7 RNAP with high specific activity.
Area of Science:
- Biochemistry
- Molecular Biology
- Protein Purification
Background:
- T7 RNA polymerase (RNAP) is a crucial enzyme in molecular biology.
- Efficient purification of active T7 RNAP is essential for various applications.
- Existing purification methods can be time-consuming or less efficient.
Purpose of the Study:
- To develop a rapid and effective purification procedure for T7 RNAP.
- To utilize the reversible binding of T7 RNAP to cibacron blue for purification.
- To compare the novel method with existing ion-exchange chromatography techniques.
Main Methods:
- Affinity chromatography using a blue sepharose column (cibacron blue coupled to sepharose).
- Enzyme elution using high salt concentrations (2M NaCl) or salt with UTP (1M NaCl + 1mM UTP).
- Comparison of the affinity method with traditional ion-exchange chromatography.
Main Results:
- The blue sepharose chromatography rapidly yielded essentially pure T7 RNAP.
- Elution with 2M NaCl or 1M NaCl with 1mM UTP was effective.
- The purified T7 RNAP exhibited high specific activity.
- The results were comparable to ion-exchange chromatography.
Conclusions:
- Cibacron blue affinity chromatography is a rapid and efficient method for T7 RNAP purification.
- This method provides high yields of active enzyme.
- It offers a viable alternative to conventional purification techniques for T7 RNAP.