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- W1965895754 endingPage "11375" @default.
- W1965895754 startingPage "11370" @default.
- W1965895754 abstract "We have molecularly characterized a proteolytic cleavage in conserved nuclear pore complex proteins. This cleavage, previously demonstrated to be essential for the biogenesis of two nuclear pore complex proteins in mammals (Nup98 and Nup96) and yeast (Nup145-N and Nup145-C), occurs between Phe and Ser residues within a highly conserved domain in a polyprotein precursor. Here, we show that a protease is not involved in the cleavage event. By using a combination of domain mapping and site-directed mutagenesis, we demonstrate that the human nuclear pore complex protein Nup98 specifically cleaves itself between F863 and S864. A region of Nup98, amino acids 715-920, is able to cleave, whereas a smaller region, amino acids 772-920, does not cleave. In addition, we have generated a Nup98 mutant that cleaves under defined conditions in vitro. Further, the two cleaved fragments of Nup98 form a complex, providing a possible mechanism whereby specific, yet low-affinity, binding between Nup98 and Nup96 is responsible for the nuclear targeting of Nup96. Although apparently unrelated evolutionarily, Nup98 has converged on an autoproteolytic biogenesis mechanism similar to that of hedgehog proteins, the inteins, and the N-terminal nucleophile proteins." @default.
- W1965895754 created "2016-06-24" @default.
- W1965895754 creator A5004261586 @default.
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- W1965895754 date "1999-09-28" @default.
- W1965895754 modified "2023-10-14" @default.
- W1965895754 title "Autoproteolysis in nucleoporin biogenesis" @default.
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- W1965895754 doi "https://doi.org/10.1073/pnas.96.20.11370" @default.
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