This is a family of largely microsporidia-specific proteins [2]. One member is annotated as being a ribonucleoprotein [2]. The family carries two pairs of CxxC residues suggesting that there is DNA-binding.

1: Reduction and expansion in microsporidian genome evolution: new insights from comparative genomics. Nakjang S, Williams TA, Heinz E, Watson AK, Foster PG, Sendra KM, Heaps SE, Hirt RP, Martin Embley T; Genome Biol Evol. 2013;5:2285-2303. PMID:24259309

2: Genome sequencing and comparative genomics of honey bee microsporidia, Nosema apis reveal novel insights into host-parasite interactions. Chen Yp, Pettis JS, Zhao Y, Liu X, Tallon LJ, Sadzewicz LD, Li R, Zheng H, Huang S, Zhang X, Hamilton MC, Pernal SF, Melathopoulos AP, Yan X, Evans JD; BMC Genomics. 2013;14:451. PMID:23829473