A protein complex involved in regulation of mRNA processing and apoptosis. It binds to RNA in a sequence-independent manner and is recruited to the EJC prior to or during the splicing process. In humans the core proteins are RNPS1, SAP18 and ACIN1.
Source:
GOC:dph,
PMID:12665594,
PMID:22388736,
PMID:16314458