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. 1986 May 12;14(9):3717–3727. doi: 10.1093/nar/14.9.3717

Target sites for the transposition of rat long interspersed repeated DNA elements (LINEs) are not random.

A V Furano, C C Somerville, P N Tsichlis, E D'Ambrosio
PMCID: PMC339810  PMID: 3012480

Abstract

The long interspersed repeated DNA family of rats (LINE or L1Rn family) contains about 40,000 6.7-kilobase (kb) long members (1). LINE members may be currently mobile since their presence or absence causes allelic variation at three single copy loci (2, 3): insulin 1, Moloney leukemia virus integration 2 (Mlvi-2) (4), and immunoglobulin heavy chain (Igh). To characterize target sites for LINE insertion, we compared the DNA sequences of the unoccupied Mlvi-2 target site, its LINE-containing allele, and several other LINE-containing sites. Although not homologous overall, the target sites share three characteristics: First, depending on the site, they are from 68% to 86% (A+T) compared to 58% (A+T) for total rat DNA (5). Depending on the site, a 7- to 15-bp target site sequence becomes duplicated and flanks the inserted LINE member. The second is a version (0 or 1 mismatch) of the hexanucleotide, TACTCA, which is also present in the LINE member, in a highly conserved region located just before the A-rich right end of the LINE member. The third is a stretch of alternating purine/pyrimidine (PQ). The A-rich right ends of different LINE members vary in length and composition, and the sequence of a particularly long one suggests that it contains the A-rich target site from a previous transposition.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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