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Science 4 October 2002:
Vol. 298. no. 5591, pp. 216 - 218
DOI: 10.1126/science.1075642

Reports

Excess Polymorphisms in Genes for Membrane Proteins in Plasmodium falciparum

Sarah K. Volkman,1 Daniel L. Hartl,2 Dyann F. Wirth,1 Kaare M. Nielsen,23 Mehee Choi,2 Serge Batalov,4 Yingyao Zhou,4 David Plouffe,4 Karine G. Le Roch,4 Ruben Abagyan,4 Elizabeth A. Winzeler45*

The detection of single-nucleotide polymorphisms in pathogenic microorganisms has normally been carried out by trial and error. Here we show that DNA hybridization with high-density oligonucleotide arrays provides rapid and convenient detection of single-nucleotide polymorphisms in Plasmodium falciparum, despite its exceptionally high adenine-thymine (AT) content (82%). A disproportionate number of polymorphisms are found in genes encoding proteins associated with the cell membrane. These genes are targets for only 22% of the oligonucleotide probes but account for 69% of the polymorphisms. Genetic variation is also enriched in subtelomeric regions, which account for 22% of the chromosome but 76% of the polymorphisms.

1 Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA.
2 Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.
3 Department of Pharmacy, University of Tromso, Tromso N-9037, Norway.
4 Genomics Institute of the Novartis Research Foundation, San Diego, CA 92121, USA.
5 Department of Cell Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.
*   To whom correspondence should be addressed. E-mail: winzeler{at}gnf.org


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