Nucleocytoplasmic Shuttling of Endocytic Proteins

Overview

Journal J Cell Biol

Specialty Cell Biology

Date 2001 Jun 27

PMID 11425879

Citations 38

Authors

M Vecchi

S Polo

V Poupon

J W van de LOO

A Benmerah

P P Di Fiore

Affiliations

Soon will be listed here.

Abstract

Many cellular processes rely on the ordered assembly of macromolecular structures. Here, we uncover an unexpected link between two such processes, endocytosis and transcription. Many endocytic proteins, including eps15, epsin1, the clathrin assembly lymphoid myeloid leukemia (CALM), and alpha-adaptin, accumulate in the nucleus when nuclear export is inhibited. Endocytosis and nucleocytoplasmic shuttling of endocytic proteins are apparently independent processes, since inhibition of endocytosis did not appreciably alter nuclear translocation of endocytic proteins, and blockade of nuclear export did not change the initial rate of endocytosis. In the nucleus, eps15 and CALM acted as positive modulators of transcription in a GAL4-based transactivation assay, thus raising the intriguing possibility that some endocytic proteins play a direct or indirect role in transcriptional regulation.

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