ISSN:
1573-6857
Keywords:
Doc
;
evolution
;
transcription
;
transposable element
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The mobile elementDoc is similar in structure and coding potential to the LINE families found in various organisms. In this paper, we analyze the insertional and structural polymorphism of this element and show that it appears to have a long evolutionary history in the genome ofD. melanogaster. Like the family ofI elements, theDoc family seems to display three types of elements: full length elements, defective members that have recently transposed and long since immobilized members common to eachD. melanogaster strain. These three classes ofDoc elements seem to be present inD. simulans, a closely related species toD. melanogaster. Furthermore, we show thatDoc is transcribed as a polyadenylated RNA of about 5 kb in length, presumed to be a full length RNA. This transcript is present in different tissues and at different stages ofDrosophila development. These results are compared with previous records on the chromosomal distribution of LINEs or other transposable element families.Doc transcription is analyzed in an attempt to understand the link betweenDoc transcription and transposition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01435244
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