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Protein Page:
TLR4 (human)

TLR4 Cooperates with LY96 and CD14 to mediate the innate immune response to bacterial lipopolysaccharide (LPS). Acts via MYD88, TIRAP and TRAF6, leading to NF-kappa-B activation, cytokine secretion and the inflammatory response. Also involved in LPS- independent inflammatory responses triggered by Ni(2+). These responses require non-conserved histidines and are, therefore, species-specific. Belongs to the lipopolysaccharide (LPS) receptor, a multi-protein complex containing at least CD14, LY96 and TLR4. Binding to bacterial LPS leads to homodimerization. Interacts with LY96 via the extracellular domain. Interacts with MYD88 and TIRAP via their respective TIR domains. Interacts with NOX4. Interacts with CNPY3. Interacts with HSP90B1. The interaction with both CNPY3 and HSP90B1 is required for proper folding in the endoplasmic reticulum. Highly expressed in placenta, spleen and peripheral blood leukocytes. Detected in monocytes, macrophages, dendritic cells and several types of T-cells. Belongs to the Toll-like receptor family. 3 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Membrane protein, integral; Receptor, misc.
Chromosomal Location of Human Ortholog: 9q33.1
Cellular Component: cell surface; cytoplasm; endosome membrane; external side of plasma membrane; integral to plasma membrane; intrinsic to plasma membrane; lipopolysaccharide receptor complex; perinuclear region of cytoplasm; plasma membrane
Molecular Function: lipopolysaccharide binding; lipopolysaccharide receptor activity; protein binding; receptor activity
Biological Process: activation of MAPK activity; activation of NF-kappaB transcription factor; defense response to bacterium; defense response to Gram-negative bacterium; detection of lipopolysaccharide; I-kappaB kinase/NF-kappaB cascade; I-kappaB phosphorylation; immune response; inflammatory response; innate immune response; interleukin-1 beta secretion; lipopolysaccharide-mediated signaling pathway; macrophage activation; MyD88-dependent toll-like receptor signaling pathway; MyD88-independent toll-like receptor signaling pathway; negative regulation of interferon-gamma production; negative regulation of interleukin-17 production; negative regulation of interleukin-23 production; negative regulation of interleukin-6 production; negative regulation of MyD88-independent toll-like receptor signaling pathway; negative regulation of tumor necrosis factor production; positive regulation of chemokine production; positive regulation of inflammatory response; positive regulation of interferon-alpha production; positive regulation of interferon-beta production; positive regulation of interferon-gamma production; positive regulation of interleukin-1 production; positive regulation of interleukin-10 production; positive regulation of interleukin-12 biosynthetic process; positive regulation of interleukin-12 production; positive regulation of interleukin-6 production; positive regulation of interleukin-8 biosynthetic process; positive regulation of interleukin-8 production; positive regulation of NF-kappaB import into nucleus; positive regulation of nitric-oxide synthase biosynthetic process; positive regulation of transcription from RNA polymerase II promoter; positive regulation of tumor necrosis factor biosynthetic process; positive regulation of tumor necrosis factor production; response to lipopolysaccharide; toll-like receptor 4 signaling pathway; toll-like receptor signaling pathway
Disease: Macular Degeneration, Age-related, 10
Reference #:  O00206 (UniProtKB)
Alt. Names/Synonyms: ARMD10; CD284; homolog of Drosophila toll; hToll; TLR4; TOLL; Toll-like receptor 4
Gene Symbols: TLR4
Molecular weight: 95,680 Da
Basal Isoelectric point: 5.88  Predict pI for various phosphorylation states
CST Pathways:  NF-kB Signaling  |  Toll-Like Receptor Signaling
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Protein Structure Not Found.
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