Snrnpd1, or Small nuclear ribonucleoprotein D1 polypeptide, is a human gene encoded by SNRPD1. It may also be known as: Small nuclear ribonucleoprotein Sm D1; Sm-D autoantigen; snRNP core protein D1; Sm-D1; HsT2456; SMD1; SNRPD; small nuclear ribonucleoprotein D1 polypeptide 16kDa. The encoded protein has an amino acid length of 119 and a mass of 13.3 kDa. Other isoforms may exist. Snrnpd1 is a member of the SnRNP core protein family. Homologs of this gene exist in other organisms, including: Chicken.