Structure of the Highly Repeated, Long Interspersed DNA Family (LINE or L1Rn) of the Rat

Overview

Journal Mol Cell Biol

Specialty Cell Biology

Date 1986 Feb 1

PMID 3023845

Citations 46

Authors

E DAmbrosio

S D Waitzkin

F R Witney

A Salemme

A V Furano

Affiliations

Soon will be listed here.

Abstract

We present the DNA sequence of a 6.7-kilobase member of the rat long interspersed repeated DNA family (LINE or L1Rn). This member (LINE 3) is flanked by a perfect 14-base-pair (bp) direct repeat and is a full-length, or close-to-full-length, member of this family. LINE 3 contains an approximately 100-bp A-rich right end, a number of long (greater than 400-bp) open reading frames, and a ca. 200-bp G + C-rich (ca. 60%) cluster near each terminus. Comparison of the LINE 3 sequence with the sequence of about one-half of another member, which we also present, as well as restriction enzyme analysis of the genomic copies of this family, indicates that in length and overall structure LINE 3 is quite typical of the 40,000 or so other genomic members of this family which would account for as much as 10% of the rat genome. Therefore, the rat LINE family is relatively homogeneous, which contrasts with the heterogeneous LINE families in primates and mice. Transcripts corresponding to the entire LINE sequence are abundant in the nuclear RNA of rat liver. The characteristics of the rat LINE family are discussed with respect to the possible function and evolution of this family of DNA sequences.

Citing Articles

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Rapid evolution of a young L1 (LINE-1) clade in recently speciated Rattus taxa.

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A LINE-like transposable element in Drosophila, the I factor, encodes a protein with properties similar to those of retroviral nucleocapsids.

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