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Protein Page:
TLR9 (human)

TLR9 Key component of innate and adaptive immunity. TLRs (Toll-like receptors) control host immune response against pathogens through recognition of molecular patterns specific to microorganisms. TLR9 is a nucleotide-sensing TLR which is activated by unmethylated cytidine-phosphate-guanosine (CpG) dinucleotides. Acts via MYD88 and TRAF6, leading to NF-kappa-B activation, cytokine secretion and the inflammatory response. Controls lymphocyte response to Helicobacter infection. Interacts with MYD88 via their respective TIR domains. Interacts (via transmembrane domain) with UNC93B1. Interacts with CD300LH; the interaction may promote full activation of TLR9-triggered innate responses. Interacts with BTK. Interacts with CNPY3 and HSP90B1; this interaction is required for proper folding in the endoplasmic reticulum. Highly expressed in spleen, lymph node, tonsil and peripheral blood leukocytes, especially in plasmacytoid pre- dendritic cells. Levels are much lower in monocytes and CD11c+ immature dendritic cells. Also detected in lung and liver. Belongs to the Toll-like receptor family. 5 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Receptor, misc.; Membrane protein, integral
Cellular Component: Golgi membrane; endoplasmic reticulum membrane; basolateral plasma membrane; endoplasmic reticulum; lysosome; apical plasma membrane; cytoplasm; extracellular region; plasma membrane; integral to membrane; endosome membrane; endosome
Molecular Function: transmembrane receptor activity; siRNA binding; interleukin-1 receptor binding
Biological Process: positive regulation of JNK activity; regulation of cytokine secretion; positive regulation of interleukin-12 production; maintenance of gastrointestinal epithelium; positive regulation of JNK cascade; positive regulation of interferon-alpha biosynthetic process; positive regulation of NF-kappaB import into nucleus; positive regulation of interleukin-18 production; positive regulation of interleukin-10 production; activation of NF-kappaB transcription factor; positive regulation of interleukin-8 production; response to molecule of bacterial origin; negative regulation of interleukin-6 production; positive regulation of interferon-beta production; negative regulation of interleukin-8 production; inflammatory response; positive regulation of I-kappaB kinase/NF-kappaB cascade; positive regulation of interleukin-6 production; positive regulation of tumor necrosis factor production; positive regulation of chemokine production; positive regulation of toll-like receptor signaling pathway; MyD88-dependent toll-like receptor signaling pathway; inhibition of NF-kappaB transcription factor; positive regulation of interferon-beta biosynthetic process; defense response to bacterium; insulin receptor signaling pathway; toll-like receptor signaling pathway; negative regulation of toll-like receptor signaling pathway; innate immune response; positive regulation of transcription from RNA polymerase II promoter; toll-like receptor 9 signaling pathway; I-kappaB phosphorylation; positive regulation of interferon-gamma biosynthetic process; positive regulation of nitric-oxide synthase biosynthetic process; positive regulation of inflammatory response
Reference #:  Q9NR96 (UniProtKB)
Alt. Names/Synonyms: CD289; TLR9; Toll-like receptor 9
Gene Symbols: TLR9
Molecular weight: 115,860 Da
Basal Isoelectric point: 8.55  Predict pI for various phosphorylation states
CST Pathways:  NF-kB Signaling  |  Toll-Like Receptor Signaling
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
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Protein Structure Not Found.

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Modification Sites and Domains  

Modification Sites in Parent Protein, Orthologs, and Isoforms  

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SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.


MS: The number of records in which this modification site was assigned using ONLY proteomic discovery-mode mass spectrometry.



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