Hutten, SaskiaSaskiaHuttenWaelde, SarahSarahWaeldeSpillner, ChristianeChristianeSpillnerHauber, JoachimJoachimHauberKehlenbach, Ralph H.Ralph H.Kehlenbach2018-11-072018-11-072009https://resolver.sub.uni-goettingen.de/purl?gro-2/16966Nup358 (also known as RanBP2), a component of the cytoplasmic filaments of the nuclear pore complex, has been implicated in various nucleocytoplasmic transport pathways. Here, we identify Nup358 as an important factor for transportin-mediated nuclear import. Depletion of Nup358 resulted in a strong inhibition of nuclear import of the human immunodeficiency virus type 1 (HIV-1) Rev protein. HIV-1 Rev is an RNA-binding protein that is required for CRM1 ( also known as exportin 1)-dependent nuclear export of unspliced or partially spliced viral RNA. We show that transportin is the major nuclear import receptor for HIV-1 Rev in HeLa cells. Overexpression of transportin strongly promoted nuclear import of HIV-1 Rev in Nup358-depleted cells, indicating that the import receptor becomes rate-limiting under these conditions. Importantly, the import rate of other transportin-dependent proteins was also significantly reduced in Nup358-depleted cells. Our data therefore suggest a general role for Nup358 in transportin-mediated nuclear import.Goescholarhttps://goescholar.uni-goettingen.de/licensejournal_article10.1242/jcs.04015419299463000264777700006https://resolver.sub.uni-goettingen.de/purl?gs-1/6081