Histone-like DNA-binding protein which is capable of wrapping DNA to stabilize it, and thus to prevent its denaturation under extreme environmental conditions. Binds evenly across chromosome, does not display a preference for AT content (PubMed:21085634). Homodimer. (Microbial infection) Interacts with Bacillus phage SP01 Gp46; the interaction replaces dsDNA from the hupA-DNA complex. Evenly distributed in the nucleoid (PubMed:21085634). Belongs to the bacterial histone-like protein family.