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Rhodopsin kinase (GRK1)-S5E/S488E/T489E in complex with rhodopsin and FAB6

Analyse Rhodopsin kinase (GRK1)-S5E/S488E/T489E in complex with rhodopsin and FAB6 in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
7MTB
Type
protein
Length
1,109 residues
Chains
4
Method
electron microscopy
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Rhodopsin kinase GRK1; FAB6 heavy chain; FAB6 light chain; Rhodopsin
EC
2.7.11.14
UniProt
P28327, P02699
Ligands
SGV, RET
Pockets
9 · best druggability 0.85

Structure

electron microscopy · 4 distinct chains · 33% helix, 24% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
GRhodopsin kinase GRK1 (EC 2.7.11.14)protein34638% helix, 15% strandP28327
HFAB6 heavy chainprotein2253% helix, 40% strand—
LFAB6 light chainprotein2144% helix, 50% strand—
RRhodopsinprotein32468% helix, 4% strandP02699

Ligands and binding sites

  • SGV · Sangivamycin · ligand · chains G
  • RET · Retinal · ligand · chains R

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

Pockets

9 pockets found on a 1 Å grid, 3 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
19300.850.8680empty
21860.830.9627RET
33790.760.8643SGV
41240.420.7623empty
5800.390.7822empty

Interfaces

4 interfaces between chains.

  • H–L · 2395 Ų buried · 22 hydrogen bonds · protein-protein
  • G–R · 1370 Ų buried · 15 hydrogen bonds · protein-protein
  • G–H · 493 Ų buried · 4 hydrogen bonds · protein-protein
  • G–L · 189 Ų buried · 0 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 5 disulfide, 1 cofactor (disulfide, retinal Schiff base).

Compared structures

  • 7MTB · Rhodopsin kinase (GRK1)-S5E/S488E/T489E in complex with rhodopsin and Fab6 · the same entry in another collection · chain G against G, TM-score 1.00
  • P28327 · AlphaFold monomer V2.0 prediction for rhodopsin kinase GRK1 (P28327) · a predicted model of the same protein · chain G against A, TM-score 0.94

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