InterPro domain: IPR000061

SWAP is derived from the Suppressor-of-White-APricot splicing regulator from Drosophila melanogaster. The domain is found in regulators responsible for pervasive, nonsex-specific alternative pre-mRNA splicing characteristics and has been found in splicing regulatory proteins [ 1 ]. These ancient, conserved SWAP proteins share a colinearly arrayed series of novel sequence motifs [ 2 ].

1. Conservation of regulated alternative splicing and identification of functional domains in vertebrate homologs to the Drosophila splicing regulator, suppressor-of-white-apricot. J. Biol. Chem. 269, 16170-9
2. SWAP pre-mRNA splicing regulators are a novel, ancient protein family sharing a highly conserved sequence motif with the prp21 family of constitutive splicing proteins. Nucleic Acids Res. 22, 4510-9