SUN3 is a symbol for the gene, Sad1 and UNC84 domain containing 3, in humans. Other names include: SUN domain-containing protein 3; Sad1/unc-84 domain-containing protein 1; SUNC1. The encoded protein has an amino acid length of 357 and a mass of 40.5 kDa. Other isoforms may exist. This gene shares homology with other species, including: Mouse, Rat.