4R6A

Crystal structure of human TLR8 in complex with Hybrid-2

• PDB DOI: https://doi.org/10.2210/pdb4R6A/pdb

• Classification: RNA BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Drosophila melanogaster
• Mutation(s): No 


• Deposited: 2014-08-22 Released: 2015-08-26 
• Deposition Author(s): Tanji, H., Ohto, U., Shimizu, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.259 
• R-Value Work: 0.201 
• R-Value Observed: 0.204 

Literature

Hybrid-2: AnImidazoquinoline Dual Toll-like receptor 7/8 Agonist that Potently Activates Cytokine Production by Human Newborn and Adult Leukocytes

Ganapathi, L., Haren, S.V., Dowling, D.J., Bergelson, I., Shukla, N.M., Malladi, S.S., Balakrishna, R., Tanji, H., Ohto, U., Shimizu, T., David, S.A., Levy, O.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 192.35 kDa 
• Atom Count: 12,816 
• Modelled Residue Count: 1,486 
• Deposited Residue Count: 1,622 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Toll-like receptor 8	A, B	811	Homo sapiens	Mutation(s): 0  Gene Names: TLR8, UNQ249/PRO286
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NR97 (Homo sapiens) Explore Q9NR97  Go to UniProtKB:  Q9NR97
PHAROS:  Q9NR97 GTEx:  ENSG00000101916
Glycosylation
Glycosylation Sites: 7		Go to GlyGen: Q9NR97-1

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	C	4		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G81315DD GlyCosmos:  G81315DD GlyGen:  G81315DD

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	D, E, G, H	3		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G15407YE GlyCosmos:  G15407YE GlyGen:  G15407YE

Entity ID: 4
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	F	4		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G22573RC GlyCosmos:  G22573RC GlyGen:  G22573RC

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HB2	M [auth A], N [auth B]	1-(4-amino-2-butyl-1H-imidazo[4,5-c]quinolin-1-yl)-2-methylpropan-2-ol C18 H24 N4 O GITVQUOQRHRGQQ-UHFFFAOYSA-N
NAG	I [auth A], J [auth A], K [auth A], L [auth A], O [auth B], P [auth B], Q [auth B], R [auth B], S [auth B], T [auth B]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
HB2	BindingDB:  4R6A	EC50: min: 19, max: 100 (nM) from 2 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.259 
• R-Value Work: 0.201 
• R-Value Observed: 0.204 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 71.143	α = 90
b = 122.211	β = 91.13
c = 107.778	γ = 90

Software Package:

Software Name	Purpose
MOLREP	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-08-26 
Deposition Author(s): Tanji, H., Ohto, U., Shimizu, T.

Revision History  

• Version 1.0: 2015-08-26
  Type: Initial release
  
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary
• Version 2.1: 2024-11-13
  Changes: Data collection, Database references, Structure summary