Exportin-5 mediates the nuclear export of proteins bearing a double-stranded RNA binding domain (dsRBD) and double-stranded RNAs (cargos). Exportin-5 yeast homologue, also known as Msn5, is involved in nuclear import of replication protein A and export of Far1 and transcription factors Swi5, Swi6, Msn2, and Pho4. Its Arabidopsis homologue, HASTY 1, is involved in the nuclear export of microRNAs (miRNAs).

1: A high-resolution structure of the pre-microRNA nuclear export machinery. Okada C, Yamashita E, Lee SJ, Shibata S, Katahira J, Nakagawa A, Yoneda Y, Tsukihara T; Science. 2009;326:1275-1279. PMID:19965479