This archease family of proteins [1], has two SHS2 domains [2], with one inserted into another. It is predicted to be an enzyme [2]. It is predicted to act as a chaperone in DNA/RNA metabolism [1].

1: Predicted role for the archease protein family based on structural and sequence analysis of TM1083 and MTH1598, two proteins structurally characterized through structural genomics efforts. Canaves JM; Proteins. 2004;56:19-27. PMID:15162483

2: The SHS2 module is a common structural theme in functionally diverse protein groups, like Rpb7p, FtsA, GyrI, and MTH1598/TM1083 superfamilies. Anantharaman V, Aravind L; Proteins. 2004;56:795-807. PMID:15281131

3: Archease from Pyrococcus abyssi improves substrate specificity and solubility of a tRNA m5C methyltransferase. Auxilien S, El Khadali F, Rasmussen A, Douthwaite S, Grosjean H; J Biol Chem. 2007;282:18711-18721. PMID:17470432