7CYN

Cryo-EM structure of human TLR7 in complex with UNC93B1


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Cryo-EM structures of Toll-like receptors in complex with UNC93B1.

Ishida, H.Asami, J.Zhang, Z.Nishizawa, T.Shigematsu, H.Ohto, U.Shimizu, T.

(2021) Nat Struct Mol Biol 28: 173-180

  • DOI: 10.1038/s41594-020-00542-w
  • Primary Citation of Related Structures:  
    7C76, 7C77, 7CYN

  • PubMed Abstract: 
  • Nucleic acid-sensing Toll-like receptors (TLRs) play a pivotal role in innate immunity by recognizing foreign DNA and RNA. Compartmentalization of these TLRs in the endosome limits their activation by self-derived nucleic acids and reduces the possibility of autoimmune reactions ...

    Nucleic acid-sensing Toll-like receptors (TLRs) play a pivotal role in innate immunity by recognizing foreign DNA and RNA. Compartmentalization of these TLRs in the endosome limits their activation by self-derived nucleic acids and reduces the possibility of autoimmune reactions. Although chaperone Unc-93 homolog B1, TLR signaling regulator (UNC93B1) is indispensable for the trafficking of TLRs from the endoplasmic reticulum to the endosome, mechanisms of UNC93B1-mediated TLR regulation remain largely unknown. Here, we report two cryo-EM structures of human and mouse TLR3-UNC93B1 complexes and a human TLR7-UNC93B1 complex. UNC93B1 exhibits structural similarity to the major facilitator superfamily transporters. Both TLRs interact with the UNC93B1 amino-terminal six-helix bundle through their transmembrane and luminal juxtamembrane regions, but the complexes of TLR3 and TLR7 with UNC93B1 differ in their oligomerization state. The structural information provided here should aid in designing compounds to combat autoimmune diseases.


    Organizational Affiliation

    Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan. shimizu@mol.f.u-tokyo.ac.jp.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Toll-like receptor 7A, B1049Homo sapiensMutation(s): 0 
Gene Names: TLR7UNQ248/PRO285
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NYK1 (Homo sapiens)
Explore Q9NYK1 
Go to UniProtKB:  Q9NYK1
PHAROS:  Q9NYK1
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein unc-93 homolog B1C, D597Homo sapiensMutation(s): 0 
Gene Names: UNC93B1UNC93UNC93B
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H1C4 (Homo sapiens)
Explore Q9H1C4 
Go to UniProtKB:  Q9H1C4
PHAROS:  Q9H1C4
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseE, F2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG (Subject of Investigation/LOI)
Query on NAG

Download Ideal Coordinates CCD File 
G [auth C], H [auth D]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-01-06
    Type: Initial release
  • Version 1.1: 2021-01-27
    Changes: Database references
  • Version 1.2: 2021-02-24
    Changes: Database references