A new family of Ty1-copia-like retrotransposons originated in the tomato genome by a recent horizontal transfer event.

ABSTRACT: Rider is a novel and recently active Ty1-copia-like retrotransposon isolated from the T3238fer mutant of tomato. Structurally, it is delimited by a duplication of target sites and contains two long terminal direct repeats and an internal open reading frame, which encodes a Ty1-copia-type polyprotein with characteristic protein domains required for retrotransposition. The family of Rider elements has an intermediate copy number and is scattered in the chromosomes of tomato. Rider family members in the tomato genome share high sequence similarity, but different structural groups were identified (full-size elements, deletion derivatives, and solo LTRs). Southern blot analysis in Solanaceae species showed that Rider was a Lycopersicon-specific element. Sequence analysis revealed that among oth

SUBMITTER: Cheng X 

PROVIDER: S-EPMC2666490 | biostudies-literature | 2009 Apr

REPOSITORIES: biostudies-literature