9O07 | pdb_00009o07

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

• PDB DOI: https://doi.org/10.2210/pdb9O07/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2025-04-02 Released: 2025-11-19 
• Deposition Author(s): Abdelaal, M., Rossjohn, J., Awad, W.
• Funding Organization(s): Australian Research Council (ARC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.97 Å
• R-Value Free: 
  0.195 (Depositor), 0.194 (DCC) 
• R-Value Work: 
  0.157 (Depositor), 0.158 (DCC) 
• R-Value Observed: 
  0.159 (Depositor) 

Starting Model: experimental

Literature

Major histocompatibility complex class I-related gene protein / TCR alpha /TCR beta / Beta-2-microglobulin complex

Abdelaal, M., Rossjohn, J., Awad, W.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A1B1C1D1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: surface plasmon resonance

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A1B1C1D1 

Biological assembly 2 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 188.73 kDa 
• Atom Count: 14,488 
• Modeled Residue Count: 1,606 
• Deposited Residue Count: 1,642 
• Unique protein chains: 4

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Major histocompatibility complex class I-related gene protein	A [auth C], E [auth A]	271	Homo sapiens	Mutation(s): 1  Gene Names: MR1
UniProt & NIH Common Fund Data Resources
Find proteins for Q95460 (Homo sapiens) Explore Q95460  Go to UniProtKB:  Q95460
PHAROS:  Q95460 GTEx:  ENSG00000153029

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
TCR-alpha	B [auth D], F [auth B]	204	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
TCR-beta	C [auth E], G	246	Homo sapiens	Mutation(s): 0

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-2-microglobulin	D [auth F], H	100	Homo sapiens	Mutation(s): 0  Gene Names: B2M, CDABP0092, HDCMA22P
UniProt & NIH Common Fund Data Resources
Find proteins for P61769 (Homo sapiens) Explore P61769  Go to UniProtKB:  P61769
PHAROS:  P61769 GTEx:  ENSG00000166710

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
LFN (Subject of Investigation/LOI)	I [auth C], K [auth A]	LUMIFLAVIN C13 H12 N4 O2 KPDQZGKJTJRBGU-UHFFFAOYSA-N
GOL	L [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
NA	J [auth F]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.97 Å
• R-Value Free:  0.195 (Depositor), 0.194 (DCC) 
• R-Value Work:  0.157 (Depositor), 0.158 (DCC) 
• R-Value Observed: 0.159 (Depositor) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 212.712	α = 90
b = 69.293	β = 103.481
c = 141.169	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-11-19 
Deposition Author(s): Abdelaal, M., Rossjohn, J., Awad, W.

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Funding Organization	Location	Grant Number
Australian Research Council (ARC)	Australia	--

Revision History  

• Version 1.0: 2025-11-19
  Type: Initial release