u2af 1

NSC 194308, an enhancer of U2AF2-RNA complexes, promotes the association of the U2AF1-U2AF2-SF1-splice site RNA complex by targeting a site between U2AF2 RNA recognition motifs (RRM1 and RRM2). It inhibits pre-mRNA splicing by stalling spliceosome assembly at the stage where U2AF recruits U2 snRNP to the branchpoint. Additionally, NSC 194308 strengthens the binding of pre-mRNA to U2AF2, selectively inducing cell death in leukemia cell lines with spliceosome mutations [1].