Examination of the P-element phylogeny in light of the species phylogeny suggests that additional horizontal transfers may have occurred at various times in the past and may explain the overall structure of the P-element phylogeny in Sophophora.
The stationary P-element related gene clusters of D.guanche, D.madeirensis and D.subobscura provide a model system to study the evolutionary impact of TEs on genome evolution. Each cluster unit consists of a cis-regulatory section composed of different insertion sequences followed by the first three exons of a P-element that is coding for a 66kD 'repressor-like' protein.
A P-element related gene cluster exists at a single gene location. The repeat units consist of a truncated 2kb P-element homologous region with the coding capacity for a 66kD P-repressor-like protein. The 5' and 3' non-coding regions and the third exon have been eroded by random mutations.
Examination of the P-element phylogeny in light of the species phylogeny suggests that additional horizontal transfers may have occurred at various times in the past and may explain the overall structure of the P-element phylogeny in Sophophora.
The stationary P-element related gene clusters of D.guanche, D.madeirensis and D.subobscura provide a model system to study the evolutionary impact of TEs on genome evolution. Each cluster unit consists of a cis-regulatory section composed of different insertion sequences followed by the first three exons of a P-element that is coding for a 66kD 'repressor-like' protein.
D.madeirensis contains two sites of P-element homology, one at 85C--85D, and one at 85A.
A P-element related gene cluster exists at a single gene location. The repeat units consist of a truncated 2kb P-element homologous region with the coding capacity for a 66kD P-repressor-like protein. The 5' and 3' non-coding regions and the third exon have been eroded by random mutations.