This family of proteins is functionally uncharacterised. This family of proteins is found in archaea. Proteins in this family are approximately 230 amino acids in length. The structure of PF2046 from pyrococcus furiosus has been solved. It shows an RNaseH like fold that conserves critical catalytic residues [1]. This suggests that these proteins may cleave nucleic acid.

1: Crystal structure of a novel non-Pfam protein PF2046 solved using low resolution B-factor sharpening and multi-crystal averaging methods. Su J, Li Y, Shaw N, Zhou W, Zhang M, Xu H, Wang BC, Liu ZJ; Protein Cell. 2010;1:453-458. PMID:21203960