Consistent with the genome-wide transposition induced by PGBD5, we identified transposition events in all human chromosomes, including both genic and intergenic loci.
Clade-wide syntenic gene sets are useful for detecting genome-wide transposition and deletion events (Woodhouse et al. 2010; Schnable et al. 2012), and automation of this step could be essential in such studies.
However, type II introns were likely available in the early eukaryotic nucleus (likely imported with the mitochondrion); type II intron transpositions that were overall favored would fix, intron numbers (and thus genome-wide transposition rates) would increase, and introns would saturate the genes.
The wide range of transposition strategies adopted by TEs involve either RNA (class 1 or retrotransposons) or DNA (class 2 or DNA transposons) intermediates.
Since transcription of the LTR retroelements is the first step required for their transposition, genome-wide screening of transcriptional data was used to determine what proportion of the LTR retroelements might be active.
The Tol2 transposable element, which was originally found in the medaka fish [ 6], has been reported to be capable of undergoing efficient transposition in a wide variety of vertebrate species including zebrafish, frog, mice, chicken and human [ 7- 12].
The value of the Tol2 transposon-derived transgenesis strategy has been confirmed by reports of its ability to undergo efficient transposition in a wide variety of vertebrate species [ 7- 12].
We show in the current study that the T2/OncZ system promotes a high level of transposition and genome-wide integration.
In summary, both methods we tested for introducing transposase into the T2/OncZ concatemer lines resulted in transposition and genome-wide re-integration.
ISP is also observed between the complementary oligonucleotides in chromosomes, which has been attributed to genome-wide large-scale inversion, inversion transposition and coding sequence compositional symmetry between the strands.
However, in principle, the backward flow of specific information from the phenotype - or the environment viewed as extended phenotype - to the genome is not impossible owing to the wide spread of reverse transcription and DNA transposition.
