SNAP190 is an alias for the gene, Small nuclear RNA activating complex polypeptide 4, in humans. Other names include: snRNA-activating protein complex subunit 4; Proximal sequence element-binding transcription factor subunit alpha; PSE-binding factor subunit alpha; PTF subunit alpha; snRNA-activating protein complex 190 kDa subunit; SNAPc 190 kDa subunit; SNAPc subunit 4; PTFalpha; small nuclear RNA activating complex, polypeptide 4, 190kDa. The encoded protein has an amino acid length of 1469 and a mass of 159.4 kDa. Other isoforms may exist. This gene shares homology with other species, including: Frog.