| First Author | Hong NA | Year | 1997 |
| Journal | Mol Cell Biol | Volume | 17 |
| Issue | 4 | Pages | 2151-7 |
| PubMed ID | 9121464 | Mgi Jnum | J:77676 |
| Mgi Id | MGI:2182242 | Doi | 10.1128/mcb.17.4.2151 |
| Citation | Hong NA, et al. (1997) A targeted mutation at the T-cell receptor alpha/delta locus impairs T-cell development and reveals the presence of the nearby antiapoptosis gene Dad1. Mol Cell Biol 17(4):2151-7 |
| abstractText | Locus control regions are cis gene regulatory elements comprised of DNase I-hypersensitive sites. These regions usually do not stimulate transcription outside of a chromosomal context, and therefore their ability to regulate the expression of genes is thought to occur through the modification of chromatin accessibility. A locus control region is located downstream of the T-cell receptor (TCR) alpha/delta locus on mouse chromosome 14. This locus control region is known to drive T-cell-specific TCR alpha transcription in transgenic mice. In this report, we describe a targeted deletion of this locus control region and show that this mutation acts at a critical checkpoint in alphabeta T-cell development, between the TCR-intermediate and TCR-high stages. Our analysis further reveals that the antiapoptosis gene Dad1 is at the 3' end of the TCR alpha/delta locus and that Dad1 is required for embryogenesis. We show that mouse Dad1 has a broader expression pattern than the TCR genes, in terms of both tissue and temporal specificity. Finally, we report that the chromatin between TCR alpha and Dad1 is DNase I hypersensitive in a variety of cell types, thus correlating with Dad1 expression and raising the possibility that Dad1 regulatory sequences reside in this region. |
