SCNM1 (sodium channel modifier 1) is an accessory component of the U1 splicesome protein complex. It interacts with the spliceosomal Sm and U1-70K proteins and has a direct role in splicing []. It was originally identified as a disease modifier gene required for efficient splicing of a mutant splice donor site in the sodium channel Scn8a [].
This entry represents the C-terminal acidic region of eukaryotic sodium channel modifier protein 1 (SCNM1). Deletion of this region affects the splicing and normal activity of the sodium channel Nav1.6 from gene Scn8a []. SCNM1 belongs to the U1C subfamily of RNA binding proteins that is commonly found in RNA-processing proteins, suggesting that SCNM1 is involved in splicing activities. SCNM1 and LUC7L2 associate with the mammalian spliceosomal subunit U1 snRNP [].
This C2H2 type zinc-finger is found at the N terminus of SCNM1, sodium channel modifier protein 1 []. Phylogenetic analysis of these zinc finger sequences places SCNM1 within the U1C subfamily of RNA binding proteins that is commonly found in RNA-processing proteins, suggesting that SCNM1 is involved in splicing activities [].
