Journal
EXPERIMENTAL CELL RESEARCH
Volume 313, Issue 2, Pages 219-231Publisher
ELSEVIER INC
DOI: 10.1016/j.yexcr.2006.10.006
Keywords
EHD protein; EH domain; phosphoinositide; transport; trafficking; membrane; G domain; tubular structure; vesicle; intracellular localization
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The four Eps15 homology (EH) domain-containing proteins, EHDI-EHD4, have recently been ascribed roles in the regulation of the recycling of distinct receptor molecules and are often found associated with tubular structures. Here, we report the analysis of all four EHD proteins with regard to tissue distribution, intracellular localization and lipid binding properties. Specific antibodies reveal distinct expression profiles for the individual proteins in tissues and at intracellular locations, where they potentially interact with specific phospholipids. Moreover, EHD proteins colocalize with vesicular and tubular structures, implying roles in transport processes and cytoskeletal dynamics. Protein variants carrying mutations in the N-terminal nucleotide-binding P-loop region are no longer associated with phospholipids or membrane compartments, while deletion of the C-terminal EH domain affects targeting to tubular structures. All EHD proteins are able to bind to phospholipids, but localizations differ for each protein. (c) 2006 Elsevier Inc. All rights reserved.
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