5U1R

Structure of human MR1-diclofenac in complex with human MAIT A-F7 TCR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.190 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Drugs and drug-like molecules can modulate the function of mucosal-associated invariant T cells.

Keller, A.N.Eckle, S.B.Xu, W.Liu, L.Hughes, V.A.Mak, J.Y.Meehan, B.S.Pediongco, T.Birkinshaw, R.W.Chen, Z.Wang, H.D'Souza, C.Kjer-Nielsen, L.Gherardin, N.A.Godfrey, D.I.Kostenko, L.Corbett, A.J.Purcell, A.W.Fairlie, D.P.McCluskey, J.Rossjohn, J.

(2017) Nat Immunol 18: 402-411

  • DOI: 10.1038/ni.3679
  • Primary Citation of Related Structures:  
    5U16, 5U17, 5U1R, 5U2V, 5U6Q

  • PubMed Abstract: 
  • The major-histocompatibility-complex-(MHC)-class-I-related molecule MR1 can present activating and non-activating vitamin-B-based ligands to mucosal-associated invariant T cells (MAIT cells). Whether MR1 binds other ligands is unknown. Here we identified a range of small organic molecules, drugs, drug metabolites and drug-like molecules, including salicylates and diclofenac, as MR1-binding ligands ...

    The major-histocompatibility-complex-(MHC)-class-I-related molecule MR1 can present activating and non-activating vitamin-B-based ligands to mucosal-associated invariant T cells (MAIT cells). Whether MR1 binds other ligands is unknown. Here we identified a range of small organic molecules, drugs, drug metabolites and drug-like molecules, including salicylates and diclofenac, as MR1-binding ligands. Some of these ligands inhibited MAIT cells ex vivo and in vivo, while others, including diclofenac metabolites, were agonists. Crystal structures of a T cell antigen receptor (TCR) from a MAIT cell in complex with MR1 bound to the non-stimulatory and stimulatory compounds showed distinct ligand orientations and contacts within MR1, which highlighted the versatility of the MR1 binding pocket. The findings demonstrated that MR1 was able to capture chemically diverse structures, spanning mono- and bicyclic compounds, that either inhibited or activated MAIT cells. This indicated that drugs and drug-like molecules can modulate MAIT cell function in mammals.


    Organizational Affiliation

    Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Major histocompatibility complex class I-related gene proteinAC271Homo sapiensMutation(s): 0 
Gene Names: MR1
Find proteins for Q95460 (Homo sapiens)
Explore Q95460 
Go to UniProtKB:  Q95460
NIH Common Fund Data Resources
PHAROS  Q95460
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
MAIT T-cell receptor alpha chainBD203Homo sapiensMutation(s): 0 
Gene Names: B2M
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
MAIT T-cell receptor beta chainEG245Homo sapiensMutation(s): 0 
Gene Names: TRAV/TRAC
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinFH100Homo sapiensMutation(s): 0 
Gene Names: B2MCDABP0092HDCMA22P
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
NIH Common Fund Data Resources
PHAROS  P61769
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DIF
Query on DIF

Download CCD File 
A, C
2-[2,6-DICHLOROPHENYL)AMINO]BENZENEACETIC ACID
C14 H11 Cl2 N O2
DCOPUUMXTXDBNB-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

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A, C
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

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A, B, C
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
NA
Query on NA

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C, E
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.190 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 212.571α = 90
b = 69.65β = 103.38
c = 142.85γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
PHASERphasing
PDB_EXTRACTdata extraction
MOSFLMdata reduction

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Australian Research Council (ARC)AustraliaCE140100011
Australian Research Council (ARC)AustraliaAF50

Revision History 

  • Version 1.0: 2017-03-15
    Type: Initial release
  • Version 1.1: 2017-04-05
    Changes: Database references, Derived calculations
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence, Data collection