Flanking nuclear matrix attachment regions synergize with the T cell receptor delta enhancer to promote V(D)J recombination.

Journal Article (Journal Article)

Previous studies have identified nuclear matrix attachment regions (MARs) that are closely associated with transcriptional enhancers in the IgH, Igkappa, and T cell receptor (TCR) beta loci, but have yielded conflicting information regarding their functional significance. In this report, a combination of in vitro and in situ mapping approaches was used to localize three MARs associated with the human TCR delta gene. Two of these are located within the Jdelta3-Cdelta intron, flanking the core TCR delta enhancer (Edelta) both 5' and 3' in a fashion reminiscent of the Ig heavy chain intronic enhancer-associated MARs. The third is located about 20 kb upstream, tightly linked to Ddelta1 and Ddelta2. We have previously used a transgenic minilocus V(D)J recombination reporter to establish that Edelta functions as a developmental regulator of V(D)J recombination, and that it does so by modulating substrate accessibility to the V(D)J recombinase. We show here that the Edelta-associated MARs function synergistically with the core Edelta to promote V(D)J recombination in this system, as they are required for enhancer-dependent transgene rearrangement in single-copy transgene integrants.

Full Text

Duke Authors

Cited Authors

  • Zhong, XP; Carabaña, J; Krangel, MS

Published Date

  • October 12, 1999

Published In

Volume / Issue

  • 96 / 21

Start / End Page

  • 11970 - 11975

PubMed ID

  • 10518560

Pubmed Central ID

  • PMC18396

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.96.21.11970


  • eng

Conference Location

  • United States