Related Experiment Videos
Further studies on the bioaffinity chromatography of NAD(+)-dependent dehydrogenases using the locking-on effect
P O'Carra1, T Griffin, M O'Flaherty
1Department of Biochemistry, University College, Galway, Ireland.
Biochimica Et Biophysica Acta
|October 17, 1996
Summary
This study introduces a novel "locking-on" strategy for enzyme purification using immobilized NAD+. This method enhances biospecific adsorption, enabling efficient selection of NAD+-specific enzymes from complex mixtures.
Area of Science:
- Biochemistry
- Enzyme kinetics
- Chromatography
Background:
- Traditional biospecific affinity chromatography relies on immobilized enzyme substrates, which are often difficult to synthesize.
- Ordered kinetic mechanisms are key to designing efficient enzyme purification methods.
Purpose of the Study:
- To develop an alternative strategy for enzyme purification using accessible immobilized cofactors.
- To demonstrate the efficacy of the "locking-on" approach for selecting NAD+-specific enzymes.
Main Methods:
- Utilized immobilized NAD+ as an adsorbent.
- Employed soluble analogues of enzyme-specific ligands to reinforce biospecific adsorption.
- Tested the method with lactate dehydrogenase (LDH), alcohol dehydrogenase (ADH), glutamate dehydrogenase (GDH), and malate dehydrogenase (MDH).
Main Results:
- The "locking-on" strategy successfully enhanced biospecific adsorption.
- Achieved efficient adsorptive selection of NAD+-specific enzymes.
- Demonstrated high-yield purification of bovine liver GDH from crude extracts.
Conclusions:
- The "locking-on" strategy offers a viable alternative to traditional methods for enzyme purification.
- This approach simplifies purification by using readily available immobilized cofactors.
- The method is effective for purifying various NAD+-dependent dehydrogenases.