This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
5hdh
From Proteopedia
(Difference between revisions)
| Line 9: | Line 9: | ||
== Function == | == Function == | ||
[[http://www.uniprot.org/uniprot/TLR8_HUMAN TLR8_HUMAN]] 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. Acts via MYD88 and TRAF6, leading to NF-kappa-B activation, cytokine secretion and the inflammatory response.<ref>PMID:17932028</ref> | [[http://www.uniprot.org/uniprot/TLR8_HUMAN TLR8_HUMAN]] 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. Acts via MYD88 and TRAF6, leading to NF-kappa-B activation, cytokine secretion and the inflammatory response.<ref>PMID:17932028</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Toll-like receptor 8 (TLR8) senses single-stranded RNA (ssRNA) and initiates innate immune responses. TLR8 requires proteolytic cleavage at the loop region (Z-loop) between leucine-rich repeat (LRR) 14 and LRR15 for its activation. However, the molecular basis of Z-loop processing remains unknown. To elucidate the mechanism of Z-loop processing, we performed biochemical and structural studies of how the Z-loop affects the function of TLR8. TLR8 with the uncleaved Z-loop is unable to form a dimer, which is essential for activation, irrespective of the presence of agonistic ligands. Crystallographic analysis revealed that the uncleaved Z-loop located on the ascending lateral face prevents the approach of the dimerization partner by steric hindrance. This autoinhibition mechanism of dimerization by the Z-loop might be occurring in the proteins of the same subfamily, TLR7 and TLR9. | ||
| + | |||
| + | Autoinhibition and relief mechanism by the proteolytic processing of Toll-like receptor 8.,Tanji H, Ohto U, Motoi Y, Shibata T, Miyake K, Shimizu T Proc Natl Acad Sci U S A. 2016 Mar 15;113(11):3012-7. doi:, 10.1073/pnas.1516000113. Epub 2016 Feb 29. PMID:26929371<ref>PMID:26929371</ref> | ||
| + | |||
| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 5hdh" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 15:38, 23 June 2016
Crystal structure of human TLR8 with an uncleaved Z-loop
| |||||||||||
