Splicing factor that specifically promotes exon-inclusion during alternative splicing . Interaction with YTHDC1, a RNA-binding protein that recognizes and binds N6-methyladenosine (m6A)-containing RNAs, promotes recruitment of SRSF3 to its mRNA-binding elements adjacent to m6A sites, leading to exon-inclusion during alternative splicing . Also functions as export adapter involved in mRNA nuclear export ( ). Binds mRNA which is thought to be transferred to the NXF1-NXT1 heterodimer for export (TAP/NXF1 pathway); enhances NXF1-NXT1 RNA-binding activity (, ). Involved in nuclear export of m6A-containing mRNAs via interaction with YTHDC1: interaction with YTHDC1 facilitates m6A-containing mRNA-binding to both SRSF3 and NXF1, promoting mRNA nuclear export . RNA-binding is semi-sequence specific .
Subcellular locations: Nucleus, Nucleus speckle, Cytoplasm
Recruited to nuclear speckles following interaction with YTHDC1.