This C terminal region of the DNA damage repair protein Nbs1 has been identified to be necessary for the binding of Mre11 and Tel1 [1].

1: ATM activation and its recruitment to damaged DNA require binding to the C terminus of Nbs1. You Z, Chahwan C, Bailis J, Hunter T, Russell P; Mol Cell Biol. 2005;25:5363-5379. PMID:15964794