Efficient parvovirus B19 DNA purification and molecular cloning

Area of Science:

• Virology
• Molecular Biology
• Recombinant DNA Technology

Background:

• Parvovirus B19 is a human pathogen causing various clinical manifestations.
• Efficient molecular cloning of Parvovirus B19 DNA is crucial for understanding its biology and developing diagnostics or therapeutics.
• Previous methods for Parvovirus B19 DNA isolation and cloning from clinical samples were often complex and low-yield.

Purpose of the Study:

• To develop a simple, efficient, and high-yield method for purifying and molecularly cloning Parvovirus B19 DNA.
• To enable the cloning of the complete coding internal unique sequence of Parvovirus B19 DNA directly from viremic sera.

Main Methods:

• Developed a purification protocol for Parvovirus B19 virions from small serum volumes.
• Utilized an affinity DNA binding matrix for efficient purification of double-strand (ds) viral DNA under annealing conditions.
• Employed restriction endonuclease sites (AatII and BamHI) for directional cloning of viral DNA fragments into the pUC18 plasmid vector.

Main Results:

• Achieved consistently high recovery of viral DNA using the affinity purification method.
• Successfully and stably cloned the complete coding internal unique sequence of Parvovirus B19 DNA.
• Demonstrated efficient directional cloning of two specific AatII-BamHI fragments, enabling full-length clone construction in a single ligation step.

Conclusions:

• The developed method provides a simple and efficient means for Parvovirus B19 DNA purification and molecular cloning.
• This technique facilitates the generation of full-length Parvovirus B19 DNA clones from limited clinical samples.
• The availability of cloned Parvovirus B19 DNA sequences is valuable for future research into its pathogenesis and molecular mechanisms.