+Search query
-Structure paper
Title | MyD88 TIR domain higher-order assembly interactions revealed by microcrystal electron diffraction and serial femtosecond crystallography. |
---|---|
Journal, issue, pages | Nat Commun, Vol. 12, Issue 1, Page 2578, Year 2021 |
Publish date | May 10, 2021 |
Authors | Max T B Clabbers / Susannah Holmes / Timothy W Muusse / Parimala R Vajjhala / Sara J Thygesen / Alpeshkumar K Malde / Dominic J B Hunter / Tristan I Croll / Leonie Flueckiger / Jeffrey D Nanson / Md Habibur Rahaman / Andrew Aquila / Mark S Hunter / Mengning Liang / Chun Hong Yoon / Jingjing Zhao / Nadia A Zatsepin / Brian Abbey / Emma Sierecki / Yann Gambin / Katryn J Stacey / Connie Darmanin / Bostjan Kobe / Hongyi Xu / Thomas Ve / |
PubMed Abstract | MyD88 and MAL are Toll-like receptor (TLR) adaptors that signal to induce pro-inflammatory cytokine production. We previously observed that the TIR domain of MAL (MAL) forms filaments in vitro and ...MyD88 and MAL are Toll-like receptor (TLR) adaptors that signal to induce pro-inflammatory cytokine production. We previously observed that the TIR domain of MAL (MAL) forms filaments in vitro and induces formation of crystalline higher-order assemblies of the MyD88 TIR domain (MyD88). These crystals are too small for conventional X-ray crystallography, but are ideally suited to structure determination by microcrystal electron diffraction (MicroED) and serial femtosecond crystallography (SFX). Here, we present MicroED and SFX structures of the MyD88 assembly, which reveal a two-stranded higher-order assembly arrangement of TIR domains analogous to that seen previously for MAL. We demonstrate via mutagenesis that the MyD88 assembly interfaces are critical for TLR4 signaling in vivo, and we show that MAL promotes unidirectional assembly of MyD88. Collectively, our studies provide structural and mechanistic insight into TLR signal transduction and allow a direct comparison of the MicroED and SFX techniques. |
External links | Nat Commun / PubMed:33972532 / PubMed Central |
Methods | EM (electron crystallography) / X-ray diffraction |
Resolution | 2.3 - 3 Å |
Structure data | PDB-7beq: PDB-7ber: PDB-7l6w: |
Chemicals | ChemComp-HOH: |
Source |
|
Keywords | PROTEIN BINDING / MicroED / MyD88 / TIR domain / higher-order assembly / SFX / serial femtosecond crystallography |