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Author Gottfried, Irit ♦ Ehrlich, Marcelo ♦ Ashery, Uri
Source SpringerLink
Content type Text
Publisher SP Birkhäuser Verlag Basel
File Format PDF
Copyright Year ©2009
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Life sciences; biology
Subject Keyword HIP1 ♦ Clathrin ♦ Endocytosis ♦ TIRF ♦ Live-cell imaging ♦ Biochemistry ♦ Life Sciences ♦ Biomedicine general ♦ Cell Biology
Abstract Huntingtin interacting protein 1 (HIP1) is an accessory protein of the clathrin-mediated endocytosis (CME) pathway, yet its precise role and the step at which it becomes involved are unclear. We employed live-cell imaging techniques to focus on the early steps of CME and characterize HIP1 dynamics. We show that HIP1 is highly colocalized with clathrin at the plasma membrane and shares similar dynamics with a subpopulation of clathrin assemblies. Employing transferrin receptor fused to pHluorin, we distinguished between open pits to which HIP1 localizes and newly internalized vesicles that are devoid of HIP1. Moreover, shRNA knockdown of clathrin compromised HIP1 membranal localization, unlike the reported behavior of Sla2p. HIP1 fragment, lacking its ANTH and Talin-like domains, inhibits internalization of transferrin, but retains colocalization with membranal clathrin assemblies. These data demonstrate HIP1’s role in pits maturation and formation of the coated vesicle, and its strong dependence on clathrin for membranal localization.
ISSN 1420682X
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-07-22
Publisher Place Basel
e-ISSN 14209071
Journal Cellular and Molecular Life Sciences
Volume Number 66
Issue Number 17
Page Count 15
Starting Page 2897
Ending Page 2911


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Source: SpringerLink