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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Trypanosoma brucei: the extent of conversion in antigen genes may be related to the DNA coding specificity.

The boundaries of gene conversion in variant-specific antigen genes have been determined in six clones of Trypanosoma brucei. In each clone, antigenic switching involved interaction between two telomeric members of the AnTat 1.1 multigene family, which share extensive homology throughout their coding regions. All conversion events occurred by substitution of faithful copies of donor sequences. Conversion endpoints were nonrandomly distributed. In four clones, the 5' conversion limit was near the antigen translation initiation codon, while in three clones, the 3' conversion limit was located at the "hinge" between the two major antigen domains. In one case, two segmental conversions were involved in antigen switching. These observations reveal that antigen gene conversion can occur without generating point mutations, and suggest that postrecombinational selection may impose a limit on the number of possible rearrangements within antigen genes.[1]


  1. Trypanosoma brucei: the extent of conversion in antigen genes may be related to the DNA coding specificity. Pays, E., Houard, S., Pays, A., Van Assel, S., Dupont, F., Aerts, D., Huet-Duvillier, G., Gomés, V., Richet, C., Degand, P. Cell (1985) [Pubmed]
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