How Athila retrotransposons survive in the Arabidopsis genome.

Abstract:

BACKGROUND:Transposable elements are selfish genetic sequences which only occasionally provide useful functions to their host species. In addition, models of mobile element evolution assume a second type of selfishness: elements of different families do not cooperate, but they independently fight for their survival in the host genome. RESULTS:We show that recombination events among distantly related Athila retrotransposons have led to the generation of new Athila lineages. Their pattern of diversification suggests that Athila elements survive in Arabidopsis by a combination of selfish replication and of amplification of highly diverged copies with coding potential. Many Athila elements are non-autonomous but still conserve intact open reading frames which are under the effect of negative, purifying natural selection. CONCLUSION:The evolution of these mobile elements is far more complex than hitherto assumed. Strict selfish replication does not explain all the patterns observed.

journal_name

BMC Genomics

journal_title

BMC genomics

authors

Marco A,Marín I

doi

10.1186/1471-2164-9-219

subject

Has Abstract

pub_date

2008-05-14 00:00:00

pages

219

issn

1471-2164

pii

1471-2164-9-219

journal_volume

9

pub_type

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