Related Experiment Videos
Herpes simplex virus type 1 DNA polymerase. Mechanism-based affinity chromatography.
1Experimental Therapy Division, Wellcome Research Laboratories, Research Triangle Park, North Carolina 27709.
The Journal of Biological Chemistry
|May 5, 1990
Summary
Researchers developed a novel affinity column for herpes simplex virus type 1 (HSV-1) DNA polymerase purification. This mechanism-based chromatography utilizes a modified DNA template to selectively capture and elute the enzyme.
Area of Science:
- Biochemistry
- Molecular Biology
- Virology
Background:
- Acyclovir triphosphate potently inhibits HSV-1 DNA polymerase by forming a dead-end complex.
- This inhibition occurs after acyclovir monophosphate incorporation and binding of the next template-encoded nucleotide.
Purpose of the Study:
- To design and implement a mechanism-based affinity chromatography column for HSV-1 DNA polymerase purification.
- To leverage the known inhibition mechanism for enzyme isolation.
Main Methods:
- Synthesized a DNA hook template-primer with an acyclovir monophosphate residue.
- Immobilized the modified DNA on a resin support to create an affinity column.
- Chromatographed HSV-1 DNA polymerase using salt gradients and nucleotide manipulation.
Main Results:
- The affinity column selectively retained HSV-1 DNA polymerase in the presence of the template-encoded nucleotide (dGTP).
- Enzyme elution was achieved by removing the nucleotide from the buffer, facilitating purification.
- This method demonstrated effective mechanism-based affinity chromatography.
Conclusions:
- A novel affinity chromatography method was successfully developed for HSV-1 DNA polymerase.
- Mechanism-based affinity purification offers a selective and efficient approach for enzyme isolation.
- This technique provides a valuable tool for studying HSV-1 DNA polymerase and developing antiviral therapies.