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          Institute: MPI für molekulare Zellbiologie und Genetik     Collection: Publikationen MPI-CBG 2010-arch     Display Documents



ID: 546702.0, MPI für molekulare Zellbiologie und Genetik / Publikationen MPI-CBG 2010-arch
Identification of the switch in early-to-late endosome transition.
Authors:Poteryaev, Dmitry; Datta, Sunando; Ackema, Karin; Zerial, Marino; Spang, Anne
Date of Publication (YYYY-MM-DD):2010
Title of Journal:Cell
Volume:141
Issue / Number:3
Start Page:497
End Page:508
Copyright:not available
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:Sequential transport from early to late endosomes requires the coordinated activities of the small GTPases Rab5 and Rab7. The transition between early and late endosomes could be mediated either through transport carriers or by Rab conversion, a process in which the loss of Rab5 from an endosome occurs concomitantly to the acquisition of Rab7. We demonstrate that Rab conversion is the mechanism by which proteins pass from early to late endosomes in Caenorhabditis elegans coelomocytes. Moreover, we identified SAND-1/Mon1 as the critical switch for Rab conversion in metazoa. SAND-1 serves a dual role in this process. First, it interrupts the positive feedback loop of RAB-5 activation by displacing RABX-5 from endosomal membranes; second, it times the recruitment of RAB-7, probably through interaction with the HOPS complex to the same membranes. SAND-1/Mon1 thus acts as a switch by controlling the localization of RAB-5 and RAB-7 GEFs.
External Publication Status:published
Document Type:Article
Communicated by:nn
Affiliations:MPI für molekulare Zellbiologie und Genetik
Identifiers:LOCALID:4233
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