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4qdh

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Crystal Structure of the C-terminal Domain of Mouse TLR9

Structural highlights

4qdh is a 2 chain structure with sequence from Eptatretus burgeri and Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.399Å
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

Q4G1L2_EPTBU TLR9_MOUSE 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. Plays a role in defense against systemic mouse cytomegalovirus infection. Controls lymphocyte response to Helicobacter infection.^[1] ^[2]

Publication Abstract from PubMed

Toll-like receptors (TLRs) are important pattern recognition receptors that function in innate immunity. Elucidating the structure and signaling mechanisms of TLR9, a sensor of foreign and endogenous DNA, is essential for understanding its key role in immunity against microbial pathogens as well as in autoimmunity. Abundant evidence suggests that the TLR9-CTD (C-terminal domain) by itself is capable of DNA binding and signaling. The crystal structure of unliganded mouse TLR9-CTD is presented. TLR9-CTD exhibits one unique feature, a cluster of stacked aromatic and arginine side chains on its concave face. Overall, its structure is most related to the TLR8-CTD, suggesting a similar mode of ligand binding and signaling. Proteins 2014;. (c) 2014 Wiley Periodicals, Inc.

Crystal structure of the C-terminal domain of mouse TLR9.,Collins B, Wilson IA Proteins. 2014 May 30. doi: 10.1002/prot.24616. PMID:24888966^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Tabeta K, Georgel P, Janssen E, Du X, Hoebe K, Crozat K, Mudd S, Shamel L, Sovath S, Goode J, Alexopoulou L, Flavell RA, Beutler B. Toll-like receptors 9 and 3 as essential components of innate immune defense against mouse cytomegalovirus infection. Proc Natl Acad Sci U S A. 2004 Mar 9;101(10):3516-21. Epub 2004 Mar 1. PMID:14993594 doi:http://dx.doi.org/10.1073/pnas.0400525101
↑ Anderson AE, Worku ML, Khamri W, Bamford KB, Walker MM, Thursz MR. TLR9 polymorphisms determine murine lymphocyte responses to Helicobacter: results from a genome-wide scan. Eur J Immunol. 2007 Jun;37(6):1548-61. PMID:17474149 doi:http://dx.doi.org/10.1002/eji.200636562
↑ Collins B, Wilson IA. Crystal structure of the C-terminal domain of mouse TLR9. Proteins. 2014 May 30. doi: 10.1002/prot.24616. PMID:24888966 doi:http://dx.doi.org/10.1002/prot.24616