Open AccessInterruption of two immunoglobulin heavy-chain switch regions in murine plasmacytoma P3.26Bu4 by insertion of retroviruslike element ETn.
Author(s) -
Briton E. Shell,
Paul F. Szurek,
Wesley A. Dunnick
Publication year - 1987
Publication title -
molecular and cellular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.14
H-Index - 327
eISSN - 1067-8824
pISSN - 0270-7306
DOI - 10.1128/mcb.7.4.1364
Subject(s) - biology , immunoglobulin heavy chain , transposable element , immunoglobulin class switching , dna , somatic cell , genetics , antibody , heavy chain , plasmacytoma , immunoglobulin light chain , retrotransposon , lineage (genetic) , microbiology and biotechnology , gene , genome , b cell , immunology , multiple myeloma
A number of moderately reiterated murine genetic elements have been shown to have structures like those of retroviral proviruses. These elements are thought to be transposons, although little evidence of their transposability exists. Two members of one of these families of reiterated elements, the ETn family, have inserted into separate immunoglobulin heavy-chain switch regions in the plasmacytoma P3.26Bu4. Switch regions are those DNA segments associated with each immunoglobulin heavy-chain gene in which the somatic recombinations that accompany the heavy-chain switch occur. This role in somatic recombination may be relevant to the ETn insertions into the switch regions in P3.26Bu4 DNA. P3.26Bu4 and a number of other B-lineage cells contain ETn transcripts.