SAM domain-containing protein 1 (SAMD1, also known as Atherin) is an unmethylated CpG island (CGI)-binding protein that acts as a repressive chromatin regulator. It consists of a C-terminal SAM domain (Pfam:PF00536), a central unstructured region and an atypical winged-helix N-terminal domain that directly recognizes unmethylated CpG-containing DNA. This domain has also been found in the transcriptional regulators KAT6A, KAT6B, and ZMYND11 which were grouped together as a novel class of WH domains. This entry represents this novel group of WH domains [1].

1: The SAM domain-containing protein 1 (SAMD1) acts as a repressive chromatin regulator at unmethylated CpG islands. Stielow B, Zhou Y, Cao Y, Simon C, Pogoda HM, Jiang J, Ren Y, Phanor SK, Rohner I, Nist A, Stiewe T, Hammerschmidt M, Shi Y, Bulyk ML, Wang Z, Liefke R; Sci Adv. 2021; [Epub ahead of print] PMID:33980486