This domain family is found in eukaryotes, and is typically between 72 and 83 amino acids in length. The family is found in association with Pfam:PF08241. This family is made up of S-adenosylmethionine-dependent methyltransferases [1]. The proteins are deleted in Williams-Beuren syndrome (WBS), a complex developmental disorder with multisystemic manifestations including supravalvular aortic stenosis (SVAS) and a specific cognitive phenotype [2].

1: S-Adenosylmethionine-dependent methylation in Saccharomyces cerevisiae. Identification of a novel protein arginine methyltransferase. Niewmierzycka A, Clarke S; J Biol Chem. 1999;274:814-824. PMID:9873020

2: Characterization of two novel genes, WBSCR20 and WBSCR22, deleted in Williams-Beuren syndrome. Doll A, Grzeschik KH; Cytogenet Cell Genet. 2001;95:20-27. PMID:11978965