LSM3 encodes the human gene, LSM3 homolog, U6 small nuclear RNA and mRNA degradation associated. It may also be known as: U6 snRNA-associated Sm-like protein LSm3; LSM3 homolog, U6 small nuclear RNA associated (S. cerevisiae); SMX4; USS2; YLR438C. The encoded protein has an amino acid length of 102 and a mass of 11.8 kDa. Other isoforms may exist. LSM3 is a member of the SnRNP Sm proteins family. Homologs of this gene exist in other organisms, including: Fly, Mouse, Yeast, Rat, Zebrafish, Frog, Chicken.