| Literature DB >> 20696399 |
R Brynmor Fenwick1, Louise J Campbell, Karthik Rajasekar, Sunil Prasannan, Daniel Nietlispach, Jacques Camonis, Darerca Owen, Helen R Mott.
Abstract
RLIP76 (RalBP1) is a multidomain protein that interacts with multiple small G protein families: Ral via a specific binding domain, and Rho and R-Ras via a GTPase activating domain. RLIP76 interacts with endocytosis proteins and has also been shown to behave as a membrane ATPase that transports chemotherapeutic agents from the cell. We have determined the structure of the Ral-binding domain of RLIP76 and show that it comprises a coiled-coil motif. The structure of the RLIP76-RalB complex reveals a novel mode of binding compared to the structures of RalA complexed with the exocyst components Sec5 and Exo84. RLIP76 interacts with both nucleotide-sensitive regions of RalB, and key residues in the interface have been identified using affinity measurements of RalB mutants. Sec5, Exo84, and RLIP76 bind Ral proteins competitively and with similar affinities in vitro. Copyright 2010 Elsevier Ltd. All rights reserved.Entities:
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Year: 2010 PMID： 20696399 PMCID： PMC4214634 DOI： 10.1016/j.str.2010.05.013
Source DB: PubMed Journal: Structure ISSN： 0969-2126 Impact factor: 5.006