Cloning of Plasmodium falciparum var Genes Using TAR Cloning
Author Information
Author(s): Annette Gaida, Marion M. Becker, Christoph D. Schmid, Tobias Bühlmann, Edward J. Louis, Hans-Peter Beck
Primary Institution: Swiss Tropical and Public Health Institute, University of Basel, Centre for Genetics and Genomics, The University of Nottingham
Hypothesis
Can transformation-associated recombination (TAR) cloning be effectively used to isolate individual var genes from Plasmodium falciparum?
Conclusion
The study successfully demonstrates that TAR cloning can rapidly isolate the repertoire of var genes from Plasmodium falciparum.
Supporting Evidence
- TAR cloning yielded 205 clones, with 98 testing positive for var gene sequences.
- Southern blot analysis revealed 91% of screened clones contained var genes.
- RFLP analysis showed high variability among isolated var genes.
Takeaway
Scientists found a way to quickly grab pieces of DNA from a malaria parasite to learn more about how it changes to avoid our immune system.
Methodology
The study used transformation-associated recombination (TAR) cloning to isolate var genes from the P. falciparum strain ITG2F6, resulting in a library of 205 clones.
Potential Biases
No bias towards cloning certain var genes was observed, but the study acknowledges potential issues with sequence diversity.
Limitations
PCR screening was not fully reliable for detecting all var genes due to low conservation in the DBL1alpha domain.
Digital Object Identifier (DOI)
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