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Crystal structure of the MCD1D/XXA (JJ239)/INKTCR ternary complex

Analyse Crystal structure of the MCD1D/XXA (JJ239)/INKTCR ternary complex in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
6MIY
Type
protein
Length
1,619 residues
Chains
8
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
T cell receptor alpha variable 11,T cell receptor alpha variable 11,T cell receptor alpha…
UniProt
A0A0B4J1J9, K7N5M3, A2NTY6, A0N8J3, A0A5B9, A0A0R4J090, P01887
Ligands
JTV, NAG, FUC, NA, CL
Pockets
20 · best druggability 0.85

Structure

x-ray diffraction · 7 distinct chains · 12% helix, 45% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
CT cell receptor alpha variable 11,T cell receptor alpha variable 11,T cell receptor alpha joining 18,HUMAN nkt TCR alpha chain, chimeric proteinprotein2005% helix, 47% strandA0A0B4J1J9, K7N5M3
DBeta-CHAIN,T cell receptor CHAIN,T cell receptor beta constant 2, chimeric proteinprotein2406% helix, 49% strandA2NTY6, A0N8J3, A0A5B9
AAntigen-presenting glycoprotein CD1D1protein27125% helix, 41% strandA0A0R4J090
B, FBeta-2-microglobulinprotein980% helix, 48% strandP01887
EAntigen-presenting glycoprotein CD1D1protein27426% helix, 41% strandA0A0R4J090
GT cell receptor alpha variable 11,T cell receptor alpha variable 11,T cell receptor alpha joining 18,HUMAN nkt TCR alpha chain, chimeric proteinprotein1992% helix, 46% strandA0A0B4J1J9, K7N5M3
HBeta-CHAIN,T cell receptor CHAIN,T cell receptor beta constant 2, chimeric proteinprotein2396% helix, 49% strandA2NTY6, A0N8J3, A0A5B9

Ligands and binding sites

  • JTV · N-{(2S,3S,4R)-1-[(4-O-benzyl-alpha-D-galactopyranosyl) oxy]-3,4-dihydroxyoctadecan-2-yl}hexacosanamide · ligand · 2 copies · chains C, A, E, G
  • NAG · 2-acetamido-2-deoxy-beta-D-glucopyranose · sugar · 12 copies · chains A, E
  • FUC · alpha-L-fucopyranose · sugar · 2 copies · chains A, E
  • NA · Sodium ion · metal · 4 copies · chains C, D, G, H
  • CL · Chloride ion · ion · chains D
  • GOL · Glycerol · additive · 4 copies · chains A, E, G, H

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

20 pockets found on a 1 Å grid, 7 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
18890.850.8779JTV
28780.850.8781JTV
310810.710.7577empty
410000.700.7568NA
54290.650.7851empty

Interfaces

10 interfaces between chains.

  • C–D · 2175 Ų buried · 24 hydrogen bonds · protein-protein
  • G–H · 2137 Ų buried · 25 hydrogen bonds · protein-protein
  • E–F · 1278 Ų buried · 15 hydrogen bonds · protein-protein
  • A–B · 1246 Ų buried · 14 hydrogen bonds · protein-protein
  • C–A · 480 Ų buried · 13 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 16 disulfide, 6 glycan (disulfide, N-glycosylation).

Compared structures

  • 6MIY · Crystal structure of the mCD1d/xxa (JJ239)/iNKTCR ternary complex · the same entry in another collection · chain F against F, TM-score 1.00
  • P01887 · AlphaFold monomer V2.0 prediction for beta-2-microglobulin (P01887) · a predicted model of the same protein · chain B against A, TM-score 0.98
  • A0A5B9 · AlphaFold monomer V2.0 prediction for T cell receptor beta constant 2 (A0A5B9) · a predicted model of the same protein · chain H against A, TM-score 0.53

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