4L4V

Structure of human MAIT TCR in complex with human MR1-RL-6-Me-7-OH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Recognition of vitamin B metabolites by mucosal-associated invariant T cells.

Patel, O.Kjer-Nielsen, L.Le Nours, J.Eckle, S.B.Birkinshaw, R.Beddoe, T.Corbett, A.J.Liu, L.Miles, J.J.Meehan, B.Reantragoon, R.Sandoval-Romero, M.L.Sullivan, L.C.Brooks, A.G.Chen, Z.Fairlie, D.P.McCluskey, J.Rossjohn, J.

(2013) Nat Commun 4: 2142-2142

  • DOI: 10.1038/ncomms3142
  • Primary Citation of Related Structures:  
    4L4T, 4L4V

  • PubMed Abstract: 
  • The mucosal-associated invariant T-cell antigen receptor (MAIT TCR) recognizes MR1 presenting vitamin B metabolites. Here we describe the structures of a human MAIT TCR in complex with human MR1 presenting a non-stimulatory ligand derived from folic ...

    The mucosal-associated invariant T-cell antigen receptor (MAIT TCR) recognizes MR1 presenting vitamin B metabolites. Here we describe the structures of a human MAIT TCR in complex with human MR1 presenting a non-stimulatory ligand derived from folic acid and an agonist ligand derived from a riboflavin metabolite. For both vitamin B antigens, the MAIT TCR docks in a conserved manner above MR1, thus acting as an innate-like pattern recognition receptor. The invariant MAIT TCR α-chain usage is attributable to MR1-mediated interactions that prise open the MR1 cleft to allow contact with the vitamin B metabolite. Although the non-stimulatory antigen does not contact the MAIT TCR, the stimulatory antigen does. This results in a higher affinity of the MAIT TCR for a stimulatory antigen in comparison with a non-stimulatory antigen. We formally demonstrate a structural basis for MAIT TCR recognition of vitamin B metabolites, while illuminating how TCRs recognize microbial metabolic signatures.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Major histocompatibility complex class I-related gene proteinAC271Homo sapiensMutation(s): 1 
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
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinBF99Homo 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
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
MAIT T-cell receptor alpha chainDG203Homo sapiensMutation(s): 0 
Gene Names: TCR alphaTRA@
Find proteins for Q6P4G7 (Homo sapiens)
Explore Q6P4G7 
Go to UniProtKB:  Q6P4G7
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
MAIT T-cell receptor beta chainEH245Homo sapiensMutation(s): 0 
Gene Names: TCR betaTRBC1
Find proteins for P01850 (Homo sapiens)
Explore P01850 
Go to UniProtKB:  P01850
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1VY
Query on 1VY

Download CCD File 
A, C
1-deoxy-1-(7-hydroxy-6-methyl-2,4-dioxo-3,4-dihydropteridin-8(2H)-yl)-D-ribitol
C12 H16 N4 O7
COXMGTTXHPRZBO-BBVRLYRLSA-N
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
B, E
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1VYKd:  1650   nM  Binding MOAD
1VYKd :  1650   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 218.37α = 90
b = 71.203β = 104.86
c = 144.642γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
BUSTERrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Revision History 

  • Version 1.0: 2013-07-17
    Type: Initial release
  • Version 1.1: 2013-09-11
    Changes: Database references