FEATURES

FAMILY

DESCRIPTION

Also known as IMA1_YEAST, SRP1, KAP60. Functions in nuclear protein import as an adapter protein for importin beta nuclear receptors (PubMed:10913188). Binds specifically and directly to substrates containing either a simple or bipartite NLS motif (PubMed:10745017). Promotes docking of import substrates to the nuclear envelope (PubMed:8521485). Together with importin beta KAP95, mediates nuclear import of transcription factor GCN4 (PubMed:14648200). Together with tethering factor STS1, targets the proteasome to the nucleus (PubMed:10913188, PubMed:21075847). Forms a complex with an importin beta subunit. In the nucleus, interacts with NUP2 which accelerate release of NLSs, NUP2 is subsequently displaced by CSE1:RanGTP which mediates re-export and recycling. Interacts with HEH2, SHE2, and STS1.

EXTERNAL LINKS

SRP1

Importin subunit alpha

SRP1

Molecular Synopsis