Dual functions of Nbs1 in the repair of DNA breaks and proliferation ensure proper V(D)J recombination and T-cell development.

Abstract excerpt

Immunodeficiency and lymphoid malignancy are hallmarks of the human disease Nijmegen breakage syndrome (NBS; OMIM 251260), which is caused by NBS1 mutations. Although NBS1 has been shown to bind to the T-cell receptor alpha (TCRα) locus, its role in TCRβ rearrangement is unclear. Hypomorphic mutations of Nbs1 in mice and patients result in relatively mild T-cell deficiencies, raising the question of whether the...

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