Rapidly-diverging family of HU domains predominantly observed in the bacteroidetes lineage with a predicted role in recognition and possible interception of the DNA of parasitic elements, a counter-conflict strategy preventing incorporation of these elements into the host genome [1].

1: Novel clades of the HU/IHF superfamily point to unexpected roles in the eukaryotic centrosome, chromosome partitioning, and biologic conflicts. Burroughs AM, Kaur G, Zhang D, Aravind L; Cell Cycle. 2017;16:1093-1103. PMID:28441108