Skip to main page content
U.S. flag

An official website of the United States government

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2008 Jan;279(1):63-73.
doi: 10.1007/s00438-007-0295-0. Epub 2007 Oct 10.

GalEa retrotransposons from galatheid squat lobsters (Decapoda, Anomura) define a new clade of Ty1/copia-like elements restricted to aquatic species

Yves Terrat  1 , Eric Bonnivard, Dominique Higuet
Affiliations

GalEa retrotransposons from galatheid squat lobsters (Decapoda, Anomura) define a new clade of Ty1/copia-like elements restricted to aquatic species

Yves Terrat et al. Mol Genet Genomics. 2008 Jan.

Abstract

Crustacean species have not been examined in great detail for their transposable elements content. Here we focus on galatheid crabs, which are one of the most diverse and widespread taxonomic groups of Decapoda. Ty1/copia retrotransposons are a diverse and taxonomically dispersed group. Using degenerate primers, we isolated several DNA fragments that show homology with Ty1/copia retroelements reverse transcriptase gene. We named the corresponding elements from which they originated GalEa1 to GalEa3 and analyzed one of them further by isolating various clones containing segments of GalEa1. This is the first LTR retrotransposon described in crustacean genome. Nucleotide sequencing of the clones revealed that GalEa1 has LTRs (124 bp) and that the internal sequence (4,421 bp) includes a single large ORF containing gag and pol regions. Further screening identified highly related elements in six of the nine galatheid species studied. By performing BLAST searches on genome databases, we could also identify GalEa-like elements in some fishes and Urochordata genomes. These elements define a new clade of Ty1/copia retrotransposons that differs from all other Ty1/copia elements and that seems to be restricted to aquatic species.

PubMed Disclaimer

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. J Mol Evol. 2004 Dec;59(6):747-60 - PubMed
    1. Trends Genet. 2003 Feb;19(2):68-72 - PubMed
    1. Mol Biol Evol. 1999 Apr;16(4):502-11 - PubMed
    1. Trends Genet. 2003 Oct;19(10):530-6 - PubMed
    1. Genome Res. 2001 Jul;11(7):1187-97 - PubMed

Associated data

LinkOut - more resources