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Cryo-EM structure of ACKR3 in complex with CXCL12, an intracellular Fab, and an extracellular Fab

Analyse Cryo-EM structure of ACKR3 in complex with CXCL12, an intracellular Fab, and an… in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
7SK3
Type
protein
Length
831 residues
Chains
6
Method
electron microscopy
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Atypical chemokine receptor 3; Stromal cell-derived factor 1; CID25 Fab light chain…
UniProt
P25106, P48061
Ligands
CLR
Pockets
12 · best druggability 0.80

Structure

electron microscopy · 6 distinct chains · 31% helix, 29% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
AAtypical chemokine receptor 3protein30477% helix, 5% strandP25106
BStromal cell-derived factor 1protein6826% helix, 19% strandP48061
CCID25 Fab light chainprotein1050% helix, 47% strand—
DCID25 Fab heavy chainprotein1232% helix, 48% strand—
ECID24 Fab light chainprotein1060% helix, 42% strand—
FCID24 Fab heavy chainprotein1255% helix, 50% strand—

Ligands and binding sites

  • CLR · Cholesterol · ligand · 8 copies · chains A

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

Pockets

12 pockets found on a 1 Å grid, 4 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
11630.800.9632empty
2750.720.9620empty
31310.690.9034empty
41330.600.8522empty
5670.500.8518empty

Interfaces

9 interfaces between chains.

  • A–B · 1904 Ų buried · 12 hydrogen bonds · protein-protein
  • A–F · 1608 Ų buried · 14 hydrogen bonds · protein-protein
  • C–D · 944 Ų buried · 2 hydrogen bonds · protein-protein
  • E–F · 936 Ų buried · 5 hydrogen bonds · protein-protein
  • B–D · 927 Ų buried · 8 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 7 disulfide (disulfide).

Compared structures

  • 7SK3 · Cryo-EM structure of ACKR3 in complex with CXCL12, an intracellular Fab, and an… · the same entry in another collection · chain F against F, TM-score 1.00
  • P25106 · AlphaFold monomer V2.0 prediction for atypical chemokine receptor 3 (P25106) · a predicted model of the same protein · chain A against A, TM-score 0.93
  • P48061 · AlphaFold monomer V2.0 prediction for stromal cell-derived factor 1 (P48061) · a predicted model of the same protein · chain B against A, TM-score 0.79

Analyse

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