title: Horizontal SPINning of transposons.
abstract: The term 'horizontal transfer (HT)' refers to the transfer of genetic material between two reproductively isolated organisms. HT is thought to occur rarely in eukaryotes compared to vertical inheritance, the transmission of DNA from parent to offspring. In a recent study we have provided evidence that a family of DNA transposons, called SPACE INVADERS or SPIN, independently invaded horizontally the genome of seven distantly related tetrapod species and subsequently amplified to high copy number in each of them. This discovery calls for further investigations to better characterize the extent to which genomes have been shaped through HT events. In this addendum, we briefly discuss some general issues regarding the study of HT and further speculate on the sequence of events that could explain the current taxonomic distribution of SPIN. We propose that the presence of SPIN in the opossum (Monodelphis domestica), a taxon endemic to South America, reflects a transoceanic HT event that occurred from Old to New World, between 46 and 15 million years ago.
authors.affiliation: Department of Biology; University of Texas at Arlington; Arlington, TX USA.
authors.forename: Clément
authors.initials: C
authors.lastname: Gilbert
authors.forename: John K
authors.initials: JK
authors.lastname: Pace
authors.forename: Cédric
authors.initials: C
authors.lastname: Feschotte
references.citation: BMC Evol Biol. 2008 Feb 27;8:67
references.pmid: 18304319
references.citation: Science. 1979 Apr 20;204(4390):272-9
references.pmid: 17800342
references.citation: Science. 2007 Sep 28;317(5846):1921-6
references.pmid: 17901334
references.citation: Syst Biol. 2006 Apr;55(2):228-44
references.pmid: 16551580
references.citation: Syst Biol. 2004 Aug;53(4):533-53
references.pmid: 15371245
references.citation: Nat Rev Microbiol. 2005 Mar;3(3):201-13
references.pmid: 15738948
references.citation: Curr Issues Mol Biol. 2004 Jan;6(1):57-71
references.pmid: 14632259
references.citation: Syst Biol. 2003 Oct;52(5):696-704
references.pmid: 14530136
references.citation: PLoS Biol. 2006 Jan;4(1):e5
references.pmid: 16336045
references.citation: Proc Natl Acad Sci U S A. 2008 Nov 4;105(44):17023-8
references.pmid: 18936483
references.citation: Nature. 2000 May 18;405(6784):299-304
references.pmid: 10830951
references.citation: Trends Microbiol. 2005 Jun;13(6):278-84
references.pmid: 15936660
references.citation: Proc Natl Acad Sci U S A. 2007 Jul 17;104(29):12046-51
references.pmid: 17623783
references.citation: Mol Phylogenet Evol. 2004 Oct;33(1):197-213
references.pmid: 15324848
references.citation: BMC Genomics. 2007 Nov 16;8:422
references.pmid: 18021408
references.citation: Science. 2008 May 30;320(5880):1210-3
references.pmid: 18511688
references.citation: Science. 2007 Sep 21;317(5845):1753-6
references.pmid: 17761848
references.citation: Adv Virus Res. 2008;71:135-71
references.pmid: 18585528
references.citation: Bioinformatics. 2001 Aug;17(8):754-5
references.pmid: 11524383
references.citation: Nature. 2005 Feb 24;433(7028):865-8
references.pmid: 15729342
references.citation: Mol Phylogenet Evol. 2007 Apr;43(1):32-48
references.pmid: 17049280
references.citation: Genetics. 2005 Feb;169(2):1033-43
references.pmid: 15731520
references.citation: Nat Genet. 1995 Jun;10(2):131-2
references.pmid: 7663506