Can constrain negative DNA supercoils (PubMed:9573212). May be involved in maintaining the integrity of the genome at high temperature (Probable). Highly stable from pH 0 to pH 12. Hyperthermostable. Monomer. Lys-5 and Lys-7 may be methylated. Belongs to the 7 kDa DNA-binding/endoribonuclease P2 family.