This C terminal domain is found in traube proteins [1]. This is the domain of the AATF proteins that interacts with BLOS2 or Ceap, that functions as an adaptor in processes such as protein and vesicle processing and transport, and perhaps transcription.

1: Insights into the evolution of the nucleolus by an analysis of its protein domain repertoire. Staub E, Fiziev P, Rosenthal A, Hinzmann B; Bioessays 2004;26:567-581. PMID:15112237

2: Characterization of rat BLOS2/Ceap, a putative yeast She3 homolog, as interaction partner of apoptosis antagonizing transcription factor/Che-1. Felten A, Leister P, Burgdorf S, Uhlmann L, Scheidtmann KH; Biol Chem. 2007;388:569-582. PMID:17552904