RGD Reference Report - The peptide repeat domain of nucleoporin Nup98 functions as a docking site in transport across the nuclear pore complex. - Rat Genome Database

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The peptide repeat domain of nucleoporin Nup98 functions as a docking site in transport across the nuclear pore complex.

Authors: Radu, A  Moore, MS  Blobel, G 
Citation: Radu A, etal., Cell 1995 Apr 21;81(2):215-22.
RGD ID: 70632
Pubmed: PMID:7736573   (View Abstract at PubMed)

We report the cDNA deduced primary structure of a wheat germ agglutinin-reactive nuclear pore complex (NPC) protein of rat. The protein, termed Nup98 (for nucleoporin of 98 kDa), contains numerous GLFG and FG repeats and some FXFG repeats and is thus a vertebrate member of a family of GLFG nucleoporins that were previously discovered in yeast. Immunoelectron microscopy showed Nup98 to be asymmetrically located at the nucleoplasmic side of the NPC. Nup98 functions as one of several docking site nucleoporins in a cytosolic docking activity-mediated binding of a model transport substrate. The docking site of Nup98 was mapped to its N-terminal half, which contains all of the peptide repeats. A recombinant segment of this region depleted the docking activity of cytosol. We suggest that the peptide repeat domain of Nup98, together with peptide repeat domains of other nucleoporins, forms an array of sites for mediated docking of transport substrate, and that bidirectional transport across the NPC proceeds by repeated docking and undocking reactions.

Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
protein import into nucleus  IMP 70632 RGD 

Cellular Component
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
nuclear pore  IDA 70632 RGD 
nucleoplasm  IDA 70632 RGD 

Molecular Function
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
peptide binding  IDA 70632 RGD 

Objects Annotated

Genes (Rattus norvegicus)
Nup98  (nucleoporin 98 and 96 precursor)


Additional Information