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Originally published In Press as doi:10.1074/jbc.M009164200 on March 26, 2001
J. Biol. Chem., Vol. 276, Issue 24, 21129-21135, June 15, 2001
Lipopolysaccharide Is in Close Proximity to Each of the Proteins
in Its Membrane Receptor Complex
TRANSFER FROM CD14 TO TLR4 AND MD-2*
Jean
da Silva Correia ,
Katrin
Soldau ,
Urs
Christen§¶,
Peter S.
Tobias , and
Richard J.
Ulevitch
From The Scripps Research Institute, Department of
Immunology and the § Department of Neuropharmacology,
La Jolla, California 92037
The structural features of some proteins of the
innate immune system involved in mediating responses to microbial
pathogens are highly conserved throughout evolution. Examples include
members of the Drosophila Toll (dToll) and the mammalian
Toll-like receptor (TLR) protein families. Activation of
Drosophila Toll is believed to occur via an endogenous
peptide rather than through direct binding of microbial products to the
Toll protein. In mammals there is a growing consensus that
lipopolysaccharide (LPS) initiates its biological activities through a
heteromeric receptor complex containing CD14, TLR4, and at least one
other protein, MD-2. LPS binds directly to CD14 but whether LPS then
binds to TLR4 and/or MD-2 is not known. We have used transient
transfection to express human TLRs, MD-2, or CD14 alone or in different
combinations in HEK 293 cells. Interactions between LPS and these
proteins were studied using a chemically modified, radioiodinated LPS
containing a covalently linked, UV light-activated cross-linking group
(125I-ASD-Re595 LPS). Here we show that LPS is cross-linked
specifically to TLR4 and MD-2 only when co-expressed with CD14. These
data support the contention that LPS is in close proximity to the three known proteins of its membrane receptor complex. Thus, LPS binds directly to each of the members of the tripartite LPS receptor complex.
*
This work was supported in part by National Institutes of
Health Grants AI15136 (to R. J. U.), GM28485 (to R. J. U.), GM37696 (to R. J. U.), AI32021 (to P. S. T.), and HL23584 (to P. S. T.). This is Publication
136-IMM from The Scripps Research Institute, Department of Immunology.The costs of publication of this
article were defrayed in part by the
payment of page charges. The article must therefore be hereby marked
"advertisement" in
accordance with 18 U.S.C. Section
1734 solely to indicate this fact.
¶
Supported by a fellowship of the Juvenile Diabetes Foundation.
To whom correspondence should be addressed. Tel.:
858-784-8219; Fax: 858-784-8239; E-mail: ulevitch@scripps.edu.
Copyright © 2001 by The American Society for Biochemistry and Molecular Biology, Inc.

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T. L. Gioannini, A. Teghanemt, D. Zhang, N. P. Coussens, W. Dockstader, S. Ramaswamy, and J. P. Weiss
Isolation of an endotoxin-MD-2 complex that produces Toll-like receptor 4-dependent cell activation at picomolar concentrations
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A. G. Stover, J. Da Silva Correia, J. T. Evans, C. W. Cluff, M. W. Elliott, E. W. Jeffery, D. A. Johnson, M. J. Lacy, J. R. Baldridge, P. Probst, et al.
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J.-L. Imler and L. Zheng
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J. F. Alcorn and J. R. Wright
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R. A. Frost and C. H. Lang
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R. K. Ernst, A. M. Hajjar, J. H. Tsai, S. M. Moskowitz, C. B. Wilson, and S. I. Miller
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A. Visintin, E. Latz, B. G. Monks, T. Espevik, and D. T. Golenbock
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F. Re and J. L. Strominger
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D. de Kleijn and G. Pasterkamp
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G. Meng, A. Grabiec, M. Vallon, B. Ebe, S. Hampel, W. Bessler, H. Wagner, and C. J. Kirschning
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S. Akashi, S.-i. Saitoh, Y. Wakabayashi, T. Kikuchi, N. Takamura, Y. Nagai, Y. Kusumoto, K. Fukase, S. Kusumoto, Y. Adachi, et al.
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M. A. Freudenberg, C. Kalis, Y. Chvatchko, T. Merlin, M. Gumenscheimer, and C. Galanos
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B. Beutler, K. Hoebe, X. Du, and R. J. Ulevitch
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J. Y. Lee, J. Ye, Z. Gao, H. S. Youn, W. H. Lee, L. Zhao, N. Sizemore, and D. H. Hwang
Reciprocal Modulation of Toll-like Receptor-4 Signaling Pathways Involving MyD88 and Phosphatidylinositol 3-Kinase/AKT by Saturated and Polyunsaturated Fatty Acids
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K. Sau, S. S. Mambula, E. Latz, P. Henneke, D. T. Golenbock, and S. M. Levitz
The Antifungal Drug Amphotericin B Promotes Inflammatory Cytokine Release by a Toll-like Receptor- and CD14-dependent Mechanism
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H. Shimomura, M. Matsuura, S. Saito, Y. Hirai, Y. Isshiki, and K. Kawahara
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K. Yamazaki, K. Ueki-Maruyama, T. Oda, K. Tabeta, Y. Shimada, H. Tai, T. Nakajima, H. Yoshie, D. Herawati, and G.J. Seymour
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N. Qureshi, P.-Y. Perera, J. Shen, G. Zhang, A. Lenschat, G. Splitter, D. C. Morrison, and S. N. Vogel
The Proteasome as a Lipopolysaccharide-Binding Protein in Macrophages: Differential Effects of Proteasome Inhibition on Lipopolysaccharide-Induced Signaling Events
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P. A. Thompson, P. S. Tobias, S. Viriyakosol, T. N. Kirkland, and R. L. Kitchens
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R. Dziarski, K. A. Platt, E. Gelius, H. Steiner, and D. Gupta
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E. S. Van Amersfoort, T. J. C. Van Berkel, and J. Kuiper
Receptors, Mediators, and Mechanisms Involved in Bacterial Sepsis and Septic Shock
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M. Sato, H. Sano, D. Iwaki, K. Kudo, M. Konishi, H. Takahashi, T. Takahashi, H. Imaizumi, Y. Asai, and Y. Kuroki
Direct Binding of Toll-Like Receptor 2 to Zymosan, and Zymosan-Induced NF-{kappa}B Activation and TNF-{alpha} Secretion Are Down-Regulated by Lung Collectin Surfactant Protein A
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K. A. Walton, A. L. Cole, M. Yeh, G. Subbanagounder, S. R. Krutzik, R. L. Modlin, R. M. Lucas, J. Nakai, E. J. Smart, D. K. Vora, et al.
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I. Ben-Shlomo, S. Yu Hsu, R. Rauch, H. W. Kowalski, and A. J. W. Hsueh
Signaling Receptome: A Genomic and Evolutionary Perspective of Plasma Membrane Receptors Involved in Signal Transduction
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F. Bihl, L. Salez, M. Beaubier, D. Torres, L. Lariviere, L. Laroche, A. Benedetto, D. Martel, J.-M. Lapointe, B. Ryffel, et al.
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T. Ohnishi, M. Muroi, and K.-i. Tanamoto
MD-2 Is Necessary for the Toll-Like Receptor 4 Protein To Undergo Glycosylation Essential for Its Translocation to the Cell Surface
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C. F. Ortega-Cava, S. Ishihara, M. A. K. Rumi, K. Kawashima, N. Ishimura, H. Kazumori, J. Udagawa, Y. Kadowaki, and Y. Kinoshita
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G. E. D. Mullen, M. N. Kennedy, A. Visintin, A. Mazzoni, C. A. Leifer, D. R. Davies, and D. M. Segal
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R. Malley, P. Henneke, S. C. Morse, M. J. Cieslewicz, M. Lipsitch, C. M. Thompson, E. Kurt-Jones, J. C. Paton, M. R. Wessels, and D. T. Golenbock
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H-J Yoon, J H Shin, S H Yang, D-W Chae, H Kim, D-S Lee, H L Kim, S Kim, J S Lee, and Y S Kim
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K. Kawasaki, H. Nogawa, and M. Nishijima
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E. Latz, A. Visintin, E. Lien, K. A. Fitzgerald, B. G. Monks, E. A. Kurt-Jones, D. T. Golenbock, and T. Espevik
Lipopolysaccharide Rapidly Traffics to and from the Golgi Apparatus with the Toll-like Receptor 4-MD-2-CD14 Complex in a Process That Is Distinct from the Initiation of Signal Transduction
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P. Knuefermann, S. Nemoto, A. Misra, N. Nozaki, G. Defreitas, S. M. Goyert, B. A. Carabello, D. L. Mann, and J. G. Vallejo
CD14-Deficient Mice Are Protected Against Lipopolysaccharide-Induced Cardiac Inflammation and Left Ventricular Dysfunction
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A. Biragyn, P. A. Ruffini, C. A. Leifer, E. Klyushnenkova, A. Shakhov, O. Chertov, A. K. Shirakawa, J. M. Farber, D. M. Segal, J. J. Oppenheim, et al.
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M. Muroi, T. Ohnishi, and K.-i. Tanamoto
Regions of the Mouse CD14 Molecule Required for Toll-like Receptor 2- and 4-mediated Activation of NF-kappa B
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X. Ye and S. F. Liu
Lipopolysaccharide Down-regulates Sp1 Binding Activity by Promoting Sp1 Protein Dephosphorylation and Degradation
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M.M. Monick and G.W. Hunninghake
Activation of second messenger pathways in alveolar macrophages by endotoxin
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S. Liu, D. J. Gallo, A. M. Green, D. L. Williams, X. Gong, R. A. Shapiro, A. A. Gambotto, E. L. Humphris, Y. Vodovotz, and T. R. Billiar
Role of Toll-Like Receptors in Changes in Gene Expression and NF-{kappa}B Activation in Mouse Hepatocytes Stimulated with Lipopolysaccharide
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D. Iwaki, H. Mitsuzawa, S. Murakami, H. Sano, M. Konishi, T. Akino, and Y. Kuroki
The Extracellular Toll-like Receptor 2 Domain Directly Binds Peptidoglycan Derived from Staphylococcus aureus
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F. Re and J. L. Strominger
Monomeric Recombinant MD-2 Binds Toll-like Receptor 4 Tightly and Confers Lipopolysaccharide Responsiveness
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M. T. Abreu, E. T. Arnold, L. S. Thomas, R. Gonsky, Y. Zhou, B. Hu, and M. Arditi
TLR4 and MD-2 Expression Is Regulated by Immune-mediated Signals in Human Intestinal Epithelial Cells
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J. Fan, A. Kapus, P. A. Marsden, Y. H. Li, G. Oreopoulos, J. C. Marshall, S. Frantz, R. A. Kelly, R. Medzhitov, and O. D. Rotstein
Regulation of Toll-Like Receptor 4 Expression in the Lung Following Hemorrhagic Shock and Lipopolysaccharide
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May 15, 2002;
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S. Li, V. M. Holers, S. A. Boackle, and C. M. Blatteis
Modulation of Mouse Endotoxic Fever by Complement
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N. Tuaillon, D. F. Shen, R. B. Berger, B. Lu, B. J. Rollins, and C.-C. Chan
MCP-1 Expression in Endotoxin-Induced Uveitis
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Copyright © 2001 by the American Society for Biochemistry and Molecular Biology.
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