Abstract:
:In murine plasmacytoma and human Burkitt's lymphoma cells, one allele of c-myc is translocated into one of the immunoglobulin loci, resulting in a characteristic pattern of deregulated c-myc transcription. Translocation events between c-myc and the IgH locus segregate c-myc and the IgH intron enhancer to different reciprocal products in all plasmacytomas and in most Burkitt's lymphoma cells, suggesting that an additional element(s) capable of affecting c-myc expression over a large and variable distance must exist in the IgH locus. The region 3' of the IgH C alpha gene contains four tissue-specific and cell stage-specific DNase I hypersensitive sites (HSs), two of which map to the late B cell-specific 3' C alpha enhancer. We report here that DNA sequences comprising the two other 3' C alpha HSs contain potential protein-binding motifs for trans-activators commonly associated with immunoglobulin enhancers and that these sites can function as cell stage-specific enhancers in transient B cell assays. A DNA fragment containing all four HSs (HS1234) synergistically activates c-myc transcription in plasmacytoma and Burkitt's lymphoma cells in transient assays and induces high-level transcription, a promoter shift from P2 to P1, and an increase in readthrough transcription in stable transfections. Furthermore, plasmacytoma clones stably transfected with a HS1234-linked c-myc construct express c-myc in a position-independent, copy number-dependent manner. These results suggest that HS1234 may function as a locus control region (LCR), deregulating c-myc expression in t(15;12) plasmacytomas, as well as potentially contributing to aspects of normal IgH chain expression.
journal_name
Genes Devjournal_title
Genes & developmentauthors
Madisen L,Groudine Mdoi
10.1101/gad.8.18.2212subject
Has Abstractpub_date
1994-09-15 00:00:00pages
2212-26issue
18eissn
0890-9369issn
1549-5477journal_volume
8pub_type
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journal_title:Genes & development
pub_type: 杂志文章
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journal_title:Genes & development
pub_type: 杂志文章
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journal_title:Genes & development
pub_type: 杂志文章
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journal_title:Genes & development
pub_type: 杂志文章
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journal_title:Genes & development
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更新日期:2007-09-01 00:00:00
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journal_title:Genes & development
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journal_title:Genes & development
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更新日期:1995-01-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:2006-09-15 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:2018-06-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
doi:10.1101/gad.12.15.2354
更新日期:1998-08-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:2004-10-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
doi:10.1101/gad.11.2.167
更新日期:1997-01-15 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
doi:10.1101/gad.13.3.253
更新日期:1999-02-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
doi:10.1101/gad.1698108
更新日期:2008-10-15 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
doi:10.1101/gad.6.7.1332
更新日期:1992-07-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:2004-07-15 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:1991-04-01 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:1991-05-01 00:00:00
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journal_title:Genes & development
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更新日期:2006-08-15 00:00:00
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journal_title:Genes & development
pub_type: 杂志文章
doi:10.1101/gad.1.7.716
更新日期:1987-09-01 00:00:00
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journal_title:Genes & development
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doi:10.1101/gad.230302
更新日期:2002-05-01 00:00:00
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journal_title:Genes & development
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更新日期:2000-05-01 00:00:00
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journal_title:Genes & development
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更新日期:2012-04-01 00:00:00
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journal_title:Genes & development
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更新日期:2008-12-01 00:00:00
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journal_title:Genes & development
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journal_title:Genes & development
pub_type: 杂志文章
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更新日期:2003-01-01 00:00:00