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Updated: Aug 20, 2026

Methods to Investigate the Regulatory Role of Small RNAs and Ribosomal Occupancy of Plasmodium falciparum
Published on: December 4, 2015
The evolution of amino acid repeat arrays in Plasmodium and other organisms
1Department of Biological Sciences, University of South Carolina, Coker Life Sciences Building, Columbia, SC 29208, USA. austin@biol.sc.edu
Abstract:
Repeat arrays in protein-coding sequences were analyzed by a novel approach, based on analyzing the distribution of the pairwise proportion of nucleotide differences among units within a repeat array. The results showed that evidence of recent repeat array expansion was particularly characteristic of the repeat arrays of the malaria parasites (genus Plasmodium), supporting the hypothesis that Plasmodium is particularly prone to repeat array expansion by slipped-strand mispairing or a similar mechanism. Repeat arrays in Plasmodium asexual-stage antigens (which are exposed to the immune system of the vertebrate host) had unique characteristics with respect to the number of repeat units, as well as nucleotide and amino acid composition, suggesting that natural selection exerted by the host immune system has shaped features of these arrays.
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