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PMID: 1978749 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Genetic exchange between endogenous and exogenous LINE-1 repetitive elements in mouse cells.

Nucleic acids research ·Vol. 18 ·No. 21 ·1990-11-11 ·Pages 6385-91

Belmaaza A, Wallenburg JC, Brouillette S, Gusew N, Chartrand P

Abstract

The repetitive LINE (L1) elements of the mouse, which are present at about 10(5) copies per genome and share over 80% of sequence homology, were examined for their ability to undergo genetic exchange with exogenous L1 sequences. The exogenous L1 sequences, carried by a shuttle vector, consisted of an internal fragment from L1Md-A2, a previously described member of the L1 family of the mouse. Using an assay that does not require the reconstitution of a selectable marker we found that this vector, in either circular or linear form, acquired DNA sequences from endogenous L1 elements at a frequency of 10(-3) to 10(-4) per rescued vector. Physical analysis of the acquired L1 sequences revealed that distinct endogenous L1 elements acted as donors and that different subfamilies participated. These results demonstrate that L1 elements are readily capable of genetic exchange. Apart from gene conversion events, the acquisition of L1 sequences outside the region of homology suggested that a second mechanism was also involved in the genetic exchange. A model which accounts for this mechanism is presented and its potential implication on the rearrangement of L1 elements is discussed.

MeSH Terms
Animals Base Sequence Cell Line Cell Transformation, Neoplastic DNA/genetics,isolation & purification Genetic Vectors Mice Models, Genetic Molecular Sequence Data Plasmids Polymorphism, Restriction Fragment Length Polyomavirus/genetics Repetitive Sequences, Nucleic Acid Restriction Mapping Transfection
Chemicals
DNA
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Belmaaza A
Canadian Red Cross Society, Research and Development, Montreal Centre, Quebec.
Wallenburg J C
Brouillette S
Gusew N
Chartrand P
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Article Info
Journal
Nucleic acids research
Abbr.
Nucleic Acids Res
ISSN
0305-1048
DOI
10.1093/nar/18.21.6385
Published
1990-11-11
Pages
6385-91
Language
English
Region
England
NLM ID
0411011
PMCID
PMC332516
Subset
IM
External Links
PubMed source DOI: 10.1093/nar/18.21.6385 PMC Full Text View journal details
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