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PMID:11071914

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Citation

Fahrenkrog, B, Hübner, W, Mandinova, A, Panté, N, Keller, W and Aebi, U (2000) The yeast nucleoporin Nup53p specifically interacts with Nic96p and is directly involved in nuclear protein import. Mol. Biol. Cell 11:3885-96

Abstract

The bidirectional nucleocytoplasmic transport of macromolecules is mediated by the nuclear pore complex (NPC) which, in yeast, is composed of approximately 30 different proteins (nucleoporins). Pre-embedding immunogold-electron microscopy revealed that Nic96p, an essential yeast nucleoporin, is located about the cytoplasmic and the nuclear periphery of the central channel, and near or at the distal ring of the yeast NPC. Genetic approaches further implicated Nic96p in nuclear protein import. To more specifically explore the potential role of Nic96p in nuclear protein import, we performed a two-hybrid screen with NIC96 as the bait against a yeast genomic library to identify transport factors and/or nucleoporins involved in nuclear protein import interacting with Nic96p. By doing so, we identified the yeast nucleoporin Nup53p, which also exhibits multiple locations within the yeast NPC and colocalizes with Nic96p in all its locations. Whereas Nup53p is directly involved in NLS-mediated protein import by its interaction with the yeast nuclear import receptor Kap95p, it appears not to participate in NES-dependent nuclear export.

Links

PubMed PMC15044

Keywords

Active Transport, Cell Nucleus; Cell Nucleus/metabolism; Cell Nucleus/ultrastructure; Fungal Proteins/genetics; Fungal Proteins/metabolism; Gene Deletion; Membrane Proteins; Microscopy, Immunoelectron; Mutation; Nuclear Localization Signals; Nuclear Pore Complex Proteins; Nuclear Proteins/genetics; Nuclear Proteins/metabolism; Porins/genetics; Porins/metabolism; Saccharomyces cerevisiae Proteins; Two-Hybrid System Techniques; Yeasts/genetics; Yeasts/metabolism; beta Karyopherins

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

YEAST:NUP53

involved_in

GO:0006607: NLS-bearing protein import into nucleus

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

YEAST:NUP53

involved_in

GO:0006607: NLS-bearing protein import into nucleus

ECO:0000316: genetic interaction evidence used in manual assertion

SGD:S000004339

P

Seeded From UniProt

complete

YEAST:NUP53

part_of

GO:0005643: nuclear pore

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete

YEAST:NUP53

part_of

GO:0044615: nuclear pore nuclear basket

ECO:0000314: direct assay evidence used in manual assertion

C

Seeded From UniProt

complete


See also

References

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