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• W1860483473 abstract "Fibroblast growth factor 1 (FGF1) taken up by cells into endocytic vesicles can be translocated across vesicular membranes into the cytosol and the nucleus where it has a growth regulatory activity. Previously, leucine-rich repeat containing 59 (LRRC59) was identified as an intracellular binding partner of FGF1, but its biological role remained unknown. Here, we show that LRRC59 is strictly required for nuclear import of exogenous FGF1. siRNA-mediated depletion of LRRC59 did not inhibit the translocation of FGF1 into cytosol, but blocked the nuclear import of FGF1. We also found that an nuclear localization sequence (NLS) in FGF1, Ran GTPase, karyopherin-α1 (Kpnα1), and Kpnβ1 were required for nuclear import of FGF1. Nuclear import of exogenous FGF2, which depends on CEP57/Translokin, was independent of LRRC59, but was dependent on Kpnα1 and Kpnβ1, while the nuclear import of FGF1 was independent of CEP57. LRRC59 is a membrane-anchored protein that localizes to the endoplasmic reticulum (ER) and the nuclear envelope (NE). We found that LRRC59 possesses NLS-like sequences in its cytosolic part that can mediate nuclear import of soluble LRRC59 variants, and that the localization of LRRC59 to the NE depends on Kpnβ1. We propose that LRRC59 facilitates transport of cytosolic FGF1 through nuclear pores by interaction with Kpns and movement of LRRC59 along the ER and NE membranes." @default.
• W1860483473 created "2016-06-24" @default.
• W1860483473 creator A5019539891 @default.
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• W1860483473 date "2012-03-04" @default.
• W1860483473 modified "2023-10-16" @default.
• W1860483473 title "Nuclear Import of Exogenous FGF1 Requires the ER-Protein LRRC59 and the Importins Kpnα1 and Kpnβ1" @default.
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• W1860483473 doi "https://doi.org/10.1111/j.1600-0854.2012.01341.x" @default.
• W1860483473 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22321063" @default.
• W1860483473 hasPublicationYear "2012" @default.
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