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Several copies of highly related transposable elements, Crmar2, Almar1, and Asmar1, are described from the genomes of Ceratitis rosa, Anastrepha ludens, and A. suspensa, respectively. One copy from C. rosa, Crmar2.5, contains a full-length, uninterrupted ORF. All the other copies, from the three species contain a long deletion within the putative ORF. The consensus Crmar2 element has features typical of the mariner/Tc1 superfamily of transposable elements. In particular, the Crmar2 consensus encodes a D,D41D motif, a variant of the D,D34D catalytic domain of mariner elements. Phylogenetic analysis of the relationships of these three elements and other members of the mariner/Tc1 superfamily, based on their encoded amino acid sequences, suggests that they form a new basal subfamily of mariner elements, the rosa subfamily. BLAST analyses identified sequences from other diptera, including Drosophila melanogaster, which appear to be members of the rosa subfamily of mariner elements. Analyses of their molecular evolution suggests that Crmar2 entered the genome of C. rosa in the recent past, a consequence of horizontal transfer.

Original publication

DOI

10.1007/s002390010246

Type

Journal article

Journal

Journal of molecular evolution

Publication Date

12/2001

Volume

53

Pages

597 - 606

Addresses

Department of Animal Biology, University of Pavia, Piazza Botta 9, I-27100 Pavia, Italy.

Keywords

Animals, Diptera, Transposases, DNA-Binding Proteins, DNA, DNA Transposable Elements, Chromosome Mapping, Cloning, Molecular, Polymerase Chain Reaction, Sequence Alignment, Sequence Analysis, DNA, Evolution, Molecular, Phylogeny, Gene Transfer, Horizontal, Amino Acid Sequence, Base Sequence, Genome, Molecular Sequence Data