P-Element-Induced Recombination in Drosophila Melanogaster: Hybrid Element Insertion
AUTOR(ES)
Gray, YHM.
RESUMO
It has previously been shown that the combination of two deleted P elements in trans, one containing the left functional end and the second element the right functional end, can lead to high levels of male recombination. This finding strongly suggests that P-element ends from different chromosomes can become associated, followed by ``pseudo-excision.'' We show that two different processes are involved in resolving the pseudo-excision event: (1) the excised P-element ends continue to function as a single unit (Hybrid Element) and insert at a nearby site in the chromosome or into the element itself [Hybrid Element Insertion (HEI)] and (2) free ends that do not contain P elements repair and rejoin [(Hybrid Excision and Repair (HER)]. Both types of resolution can lead to recombination, and this paper concentrates on the HEI class. One type of HEI event predicts the exact reverse complementary duplication of an 8-bp target site, and we have confirmed the existence of such a structure in six independently derived recombinant chromosomes. There is also a high tendency for insertion events to occur within a few bases of the original 8-bp target site, including six apparent cases of insertion into the exact site.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1207712Documentos Relacionados
- P-Element-Induced Male Recombination and Gene Conversion in Drosophila
- P-element-induced control mutations at the r gene of Drosophila melanogaster.
- P-element-induced interallelic gene conversion of insertions and deletions in Drosophila melanogaster.
- P-Element-Induced Male Recombination Can Be Produced in Drosophila Melanogaster by Combining End-Deficient Elements in Trans
- P-Element-Induced Variation in Metabolic Regulation in Drosophila
