Title

EHD2 and the novel EH domain binding protein EHBP1 couple endocytosis to the actin cytoskeleton

UMMS Affiliation

Program in Molecular Medicine; Department of Biochemistry and Molecular Pharmacology

Date

12-17-2003

Document Type

Article

Subjects

3T3-L1 Cells; Actins; Adipocytes; Amino Acid Sequence; Animals; Biological Transport; Blotting, Northern; Blotting, Western; COS Cells; Carrier Proteins; Cell Membrane; Cytoskeleton; DNA, Complementary; *Endocytosis; Endosomes; Gene Silencing; Glucose; Green Fluorescent Proteins; Humans; Immunohistochemistry; Luminescent Proteins; Mice; Microscopy, Electron; Microscopy, Fluorescence; Models, Biological; Models, Genetic; Molecular Sequence Data; Protein Binding; Protein Structure, Tertiary; RNA, Small Interfering; Rats; Rhodamines; Time Factors; Tissue Distribution; Transfection; Transferrin

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

Here we identified two novel proteins denoted EH domain protein 2 (EHD2) and EHD2-binding protein 1 (EHBP1) that link clathrin-mediated endocytosis to the actin cytoskeleton. EHD2 contains an N-terminal P-loop and a C-terminal EH domain that interacts with NPF repeats in EHBP1. Disruption of EHD2 or EHBP1 function by small interfering RNA-mediated gene silencing inhibits endocytosis of transferrin into EEA1-positive endosomes as well as GLUT4 endocytosis into cultured adipocytes. EHD2 localizes with cortical actin filaments, whereas EHBP1 contains a putative actin-binding calponin homology domain. High expression of EHD2 or EHBP1 in intact cells mediates extensive actin reorganization. Thus EHD2 appears to connect endocytosis to the actin cytoskeleton through interactions of its N-terminal domain with membranes and its C-terminal EH domain with the novel EHBP1 protein.

Rights and Permissions

Citation: J Biol Chem. 2004 Mar 12;279(11):10593-605. Epub 2003 Dec 15. Link to article on publisher's site

DOI of Published Version

10.1074/jbc.M307702200

Related Resources

Link to Article in PubMed

Journal Title

The Journal of biological chemistry

PubMed ID

14676205