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Science 28 May 1993: Vol. 260. no. 5112, pp. 1338 - 1343 DOI: 10.1126/science.8493579
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Articles
Science, Vol 260, Issue 5112, 1338-1343
Copyright © 1993 by American Association for the Advancement of Science
Human Sos1: a guanine nucleotide exchange factor for Ras that binds to GRB2
P Chardin,
JH Camonis,
NW Gale,
L van Aelst,
J Schlessinger,
MH Wigler,
and
D Bar-Sagi
Institut de Pharmacologie Moleculaire et Cellulaire, CNRS, Valbonne, France.
A human complementary DNA was isolated that encodes a widely expressed protein, hSos1, that is closely related to Sos, the product of the Drosophila son of sevenless gene. The hSos1 protein contains a region of significant sequence similarity to CDC25, a guanine nucleotide exchange factor for Ras from yeast. A fragment of hSos1 encoding the CDC25-related domain complemented loss of CDC25 function in yeast. This hSos1 domain specifically stimulated guanine nucleotide exchange on mammalian Ras proteins in vitro. Mammalian cells overexpressing full-length hSos1 had increased guanine nucleotide exchange activity. Thus hSos1 is a guanine nucleotide exchange factor for Ras. The hSos1 interacted with growth factor receptor-bound protein 2 (GRB2) in vivo and in vitro. This interaction was mediated by the carboxyl-terminal domain of hSos1 and the Src homology 3 (SH3) domains of GRB2. These results suggest that the coupling of receptor tyrosine kinases to Ras signaling is mediated by a molecular complex consisting of GRB2 and hSos1.
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- Polyomavirus Large T Antigen Induces Alterations in Cytoplasmic Signalling Pathways Involving Shc Activation.
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J. Virol.
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- A Sos-derived peptidimer blocks the Ras signaling pathway by binding both Grb2 SH3 domains and displays antiproliferative activity.
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FASEB J
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- Regulation of RasGRP via a Phorbol Ester-Responsive C1 Domain.
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Mol. Cell. Biol.
18, 6995-7008
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- Modes of action of aspirin-like drugs: Salicylates inhibit Erk activation and integrin-dependent neutrophil adhesion.
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PNAS
95, 14540-14545
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- Quality Assessment of Whole Genome Mapping Data in the Refined Familial Spastic Paraplegia Interval on Chromosome 14q.
- C. Paternotte, D. Rudnicki, C. Fizames, C.-S. Davoine, D. Mavel, A. Dürr, D. Samson, C. Marquette, D. Muselet, N. Vega-Czarny, et al. (1998)
Genome Res.
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- Identification of Limiting Steps for Efficient Trans-activation of HIV-1 Promoter by Tat in Saccharomyces cerevisiae.
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273, 28219-28228
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- Involvement of Guanosine Triphosphatases and Phospholipase C-{gamma}2 in Extracellular Signal-regulated Kinase, c-Jun NH2-terminal Kinase, and p38 Mitogen-activated Protein Kinase Activation by the B Cell Antigen Receptor.
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J. Exp. Med.
188, 1287-1295
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- Grb2 Interaction with MEK-Kinase 1 Is Involved in Regulation of Jun-Kinase Activities in Response to Epidermal Growth Factor.
- M. Pomerance, M.-C. Multon, F. Parker, C. Venot, J.-P. Blondeau, B. Tocque, and F. Schweighoffer (1998)
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273, 24301-24304
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- Structural Requirements for Function of the Crkl Adapter Protein in Fibroblasts and Hematopoietic Cells.
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Mol. Cell. Biol.
18, 5082-5090
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- Ras-GAP Controls Rho-Mediated Cytoskeletal Reorganization through Its SH3 Domain.
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Mol. Cell. Biol.
18, 5567-5578
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- Mutation of a Shc Binding Site Tyrosine Residue in ErbB3/HER3 Blocks Heregulin-dependent Activation of Mitogen-activated Protein Kinase.
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- Disabled Is a Putative Adaptor Protein That Functions during Signaling by the Sevenless Receptor Tyrosine Kinase.
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Mol. Cell. Biol.
18, 4844-4854
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- A New Tyrosine-phosphorylated 97-kDa Adaptor Protein Mediates Interleukin-2-induced Association of SHP-2 with p85-Phosphatidylinositol 3-Kinase in Human T Lymphocytes.
- F. Gesbert, C. Guenzi, and J. Bertoglio (1998)
J. Biol. Chem.
273, 18273-18281
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- Growth Factor Receptor-Bound Protein 2 (Grb2) Association with Hemopoietic Specific Protein 1: Linkage Between Lck and Grb2.
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J. Immunol.
161, 625-630
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- RhoG GTPase Controls a Pathway That Independently Activates Rac1 and Cdc42Hs.
- C. Gauthier-Rouvière, E. Vignal, M. Mériane, P. Roux, P. Montcourier, and P. Fort (1998)
Mol. Biol. Cell
9, 1379-1394
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- Insulin Receptor-mediated Dissociation of Grb2 from Sos Involves Phosphorylation of Sos by Kinase(s) Other than Extracellular Signal-regulated Kinase.
- H. Zhao, S. Okada, J. E. Pessin, and G. A. Koretzky (1998)
J. Biol. Chem.
273, 12061-12067
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- RasGRP, a Ras Guanyl Nucleotide- Releasing Protein with Calcium- and Diacylglycerol-Binding Motifs.
- J. O. Ebinu, D. A. Bottorff, E. Y. Chan, S. L. Stang, R. J. Dunn, and J. C. Stone (1998)
Science
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- Diversity of HIV-1 Vpr Interactions Involves Usage of the WXXF Motif of Host Cell Proteins.
- M. BouHamdan, Y. Xue, Y. Baudat, B. Hu, J. Sire, R. J. Pomerantz, and L.-X. Duan (1998)
J. Biol. Chem.
273, 8009-8016
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- Grb2 and Its Apoptotic Isoform Grb3-3 Associate with Heterogeneous Nuclear Ribonucleoprotein C, and These Interactions Are Modulated by Poly(U) RNA.
- F. Romero, F. Ramos-Morales, A. Dominguez, R. M. Rios, F. Schweighoffer, B. Tocque, J. A. Pintor-Toro, S. Fischer, and M. Tortolero (1998)
J. Biol. Chem.
273, 7776-7781
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- Antagonism of glucocorticoid receptor transcriptional activation by the c-Jun N-terminal kinase.
- I. Rogatsky, S. K. Logan, and M. J. Garabedian (1998)
PNAS
95, 2050-2055
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- Differential Coupling of Membrane Ig and CD40 to the Extracellularly Regulated Kinase Signaling Pathway.
- J. M. Purkerson and D. C. Parker (1998)
J. Immunol.
160, 2121-2129
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