This family represents the Poly(A) polymerase catalytic subunit found in viruses [1-2].

1: Distant Mimivirus relative with a larger genome highlights the fundamental features of Megaviridae. Arslan D, Legendre M, Seltzer V, Abergel C, Claverie JM; Proc Natl Acad Sci U S A. 2011;108:17486-17491. PMID:21987820

2: Mimivirus giant particles incorporate a large fraction of anonymous and unique gene products. Renesto P, Abergel C, Decloquement P, Moinier D, Azza S, Ogata H, Fourquet P, Gorvel JP, Claverie JM; J Virol. 2006;80:11678-11685. PMID:16971431