The Scd6-like Sm domain is found in Scd6p from S. cerevisiae, Rap55 from the newt Pleurodeles walt, and its orthologs from fungi, animals, plants and apicomplexans [1]. The domain is also found in Dcp3p and the human EDC3/FLJ21128 protein where it is fused to the the Rossmanoid YjeF-N domain [1,2]. In addition both EDC3 and Scd6p are found fused to the FDF domain [1,2].

1: Novel conserved domains in proteins with predicted roles in eukaryotic cell-cycle regulation, decapping and RNA stability. Anantharaman V, Aravind L; BMC Genomics. 2004;5:45. PMID:15257761

2: Novel Sm-like proteins with long C-terminal tails and associated methyltransferases. Albrecht M, Lengauer T; FEBS Lett 2004;569:18-26. PMID:15225602

3: RAP55, a cytoplasmic mRNP component, represses translation in Xenopus oocytes. Tanaka KJ, Ogawa K, Takagi M, Imamoto N, Matsumoto K, Tsujimoto M; J Biol Chem. 2006;281:40096-40106. PMID:17074753

4: RAP55: insights into an evolutionarily conserved protein family. Marnef A, Sommerville J, Ladomery MR; Int J Biochem Cell Biol. 2009;41:977-981. PMID:18723115

5: A divergent Sm fold in EDC3 proteins mediates DCP1 binding and P-body targeting. Tritschler F, Eulalio A, Truffault V, Hartmann MD, Helms S, Schmidt S, Coles M, Izaurralde E, Weichenrieder O; Mol Cell Biol. 2007;27:8600-8611. PMID:17923697