Reference Report

Reference
Citation	Biessmann, H., Champion, L.E., O'Hair, M., Ikenaga, K., Kasravi, B., Mason, J.M. (1992). Frequent transpositions of Drosophila melanogaster HeT-A transposable elements to receding chromosome ends. EMBO J. 11(12): 4459--4469. (Export to RIS)
FlyBase ID	FBrf0055966
Publication Type	Research paper
PubMed ID	1330538
PubMed Abstract	HeT-A elements are a new family of transposable elements in Drosophila that are found exclusively in telomeric regions and in the pericentric heterochromatin. Transposition of these elements onto broken chromosome ends has been implicated in chromosome healing. To monitor the fate of HeT-A elements that had attached to broken ends of the X chromosome, we examined individual X chromosomes from a defined population over a period of 17 generations. The ends of the X chromosomes with new HeT-A additions receded at the same rate as the broken ends before the HeT-A elements attached. In addition, some chromosomes, approximately 1% per generation, had acquired new HeT-A sequences of an average of 6 kb at their ends with oligo(A) tails at the junctions. Thus, the rate of addition of new material per generation matches the observed rate of terminal loss (70-75 bp) caused by incomplete replication at the end of the DNA molecule. One such recently transposed HeT-A element which is at least 12 kb in length has been examined in detail. It contains a single open reading frame of 2.8 kb which codes for a gag-like protein.
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Language of Publication	English
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Parent Publication
Publication Type	Journal
Abbreviation	EMBO J.
Title	The EMBO Journal
Publication Year	1982-
ISBN/ISSN	0261-4189
Data from Reference
Aberrations (2)
	Df(1)yT1a-394 Df(1)yT1a-473
Genes (1)
	HeT-A\gag
Natural transposons (1)
	HeT-A