3V47

Crystal structure of the N-terminal fragment of zebrafish TLR5 in complex with Salmonella flagellin

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.47 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.223 

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Literature

Structural basis of TLR5-flagellin recognition and signaling.

Yoon, S.I., Kurnasov, O., Natarajan, V., Hong, M., Gudkov, A.V., Osterman, A.L., Wilson, I.A.

(2012) Science 335: 859-864

  • DOI: 10.1126/science.1215584
  • Primary Citation of Related Structures:  
    3V44, 3V47

  • PubMed Abstract: 

    • Toll-like receptor 5 (TLR5) binding to bacterial flagellin activates signaling through the transcription factor NF-κB and triggers an innate immune response to the invading pathogen. To elucidate the structural basis and mechanistic implications of TLR5-flagellin recognition, we determined the crystal structure of zebrafish TLR5 (as a variable lymphocyte receptor hybrid protein) in complex with the D1/D2/D3 fragment of Salmonella flagellin, FliC, at 2 ...

    Toll-like receptor 5 (TLR5) binding to bacterial flagellin activates signaling through the transcription factor NF-κB and triggers an innate immune response to the invading pathogen. To elucidate the structural basis and mechanistic implications of TLR5-flagellin recognition, we determined the crystal structure of zebrafish TLR5 (as a variable lymphocyte receptor hybrid protein) in complex with the D1/D2/D3 fragment of Salmonella flagellin, FliC, at 2.47 angstrom resolution. TLR5 interacts primarily with the three helices of the FliC D1 domain using its lateral side. Two TLR5-FliC 1:1 heterodimers assemble into a 2:2 tail-to-tail signaling complex that is stabilized by quaternary contacts of the FliC D1 domain with the convex surface of the opposing TLR5. The proposed signaling mechanism is supported by structure-guided mutagenesis and deletion analyses on CBLB502, a therapeutic protein derived from FliC.

    Organizational Affiliation: 

    Department of Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Toll-like receptor 5b and variable lymphocyte receptor B.61 chimeric proteinA, B455Danio rerio, Eptatretus burgeri
This entity is chimeric		Mutation(s): 6 
Gene Names: tlr5b, VLRB
UniProt
Find proteins for Q4G1L2 (Eptatretus burgeri)
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Go to UniProtKB:  Q4G1L2
Find proteins for B3DIN1 (Danio rerio)
Explore B3DIN1 
Go to UniProtKB:  B3DIN1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsQ4G1L2B3DIN1
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
FlagellinC, D425Salmonella enterica subsp. enterica serovar DublinMutation(s): 0 
Gene Names: fliC, fliC1
UniProt
Find proteins for Q06971 (Salmonella dublin)
Explore Q06971 
Go to UniProtKB:  Q06971
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ06971
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseE, F, G, H 2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG
Download Ideal Coordinates CCD File 
I [auth A],
J [auth A],
K [auth B]		2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.47 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.406α = 90
b = 181.495β = 90
c = 186.367γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-02-29
    Type: Initial release
  • Version 1.1: 2012-03-07
    Changes: Structure summary
  • Version 1.2: 2017-08-02
    Changes: Refinement description, Source and taxonomy
  • Version 1.3: 2017-11-08
    Changes: Refinement description
  • Version 1.4: 2018-02-14
    Changes: Structure summary
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary