SNUPN

The nuclear import of the spliceosomal snRNPs U1, U2, U4 and U5, is dependent on the presence of a complex nuclear localization signal. The latter is composed of the 5'-2,2,7-terminal trimethylguanosine (m3G) cap structure of the U snRNA and the Sm core domain. The protein encoded by this gene interacts specifically with m3G-cap and functions as an snRNP-specific nuclear import receptor. Alternatively spliced transcript variants encoding the same protein have been identified for this gene. [provided by RefSeq, Jul 2008]

Snurportin 1

Functions as an U snRNP-specific nuclear import adapter. Involved in the trimethylguanosine (m3G)-cap-dependent nuclear import of U snRNPs. Binds specifically to the terminal m3G-cap U snRNAs.

Biological Process protein import into nucleusIEA:InterPro
Biological Process RNA import into nucleusManual Assertion Based On ExperimentIDA:ComplexPortal
Biological Process snRNA import into nucleusIEA:InterPro

Nucleus
Cytoplasm
Nucleoplasmic shuttling protein. Its nuclear import involves the nucleocytoplasmic transport receptor importin beta (PubMed:10209022, PubMed:12095920).
It is re-exported to the cytoplasm by the XPO1-dependent nuclear export receptor pathway (PubMed:10209022).