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Crystal structures of NA+,K+-ATPase in complex with istaroxime

Analyse Crystal structures of NA+,K+-ATPase in complex with istaroxime in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
7WYS
Type
protein
Length
2,632 residues
Chains
6
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
SODIUM/POTASSIUM-transporting ATPase subunit alpha-1; SODIUM/POTASSIUM-transporting…
EC
7.2.2.13
UniProt
P05024, P05027, Q58K79
Ligands
PCW, CLR, 7Q2, NAG, MG, NA
Pockets
20 · best druggability 0.82

Structure

x-ray diffraction · 4 distinct chains · 40% helix, 16% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A, CSODIUM/POTASSIUM-transporting ATPase subunit alpha-1 (EC 7.2.2.13)protein99649% helix, 15% strandP05024
BSODIUM/POTASSIUM-transporting ATPase subunit beta-1protein29121% helix, 19% strandP05027
G, EFxyd domain-containing ion transport regulatorprotein3272% helix, 0% strandQ58K79
DSODIUM/POTASSIUM-transporting ATPase subunit beta-1protein28522% helix, 20% strandP05027

Ligands and binding sites

  • PCW · 1,2-dioleoyl-sn-glycero-3-phosphocholine · ligand · 10 copies · chains A, B, C, D, E, G
  • CLR · Cholesterol · ligand · 6 copies · chains A, C, D, B, G, E
  • 7Q2 · (3E,5S,8R,9S,10R,13S,14S)-3-(2-azanylethoxyimino)-10, 13-dimethyl-1,2,4,5,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthrene-6,17-dione · ligand · 2 copies · chains A, C
  • NAG · 2-acetamido-2-deoxy-beta-D-glucopyranose · sugar · 10 copies · chains B, D
  • MG · Magnesium ion · metal · 4 copies · chains A, C
  • NA · Sodium ion · metal · 2 copies · chains A, C

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

Pockets

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

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
17470.820.8663PCW, 7Q2
27960.810.84647Q2
37760.760.8065CLR, PCW
48640.760.8078NA
58300.740.7984NA

Interfaces

10 interfaces between chains.

  • A–B · 2221 Ų buried · 25 hydrogen bonds · protein-protein
  • C–D · 2213 Ų buried · 29 hydrogen bonds · protein-protein
  • C–E · 814 Ų buried · 3 hydrogen bonds · protein-protein
  • A–G · 811 Ų buried · 4 hydrogen bonds · protein-protein
  • B–G · 297 Ų buried · 3 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 6 disulfide, 6 glycan, 2 modified (disulfide, N-glycosylation, phosphorylation).

Compared structures

  • 7WYS · Crystal structures of Na+,K+-ATPase in complex with istaroxime · the same entry in another collection · chain E against E, TM-score 1.00
  • P05027 · AlphaFold monomer V2.0 prediction for SODIUM/POTASSIUM-transporting ATPase subunit beta-1… · a predicted model of the same protein · chain D against A, TM-score 0.98
  • P05024 · AlphaFold monomer V2.0 prediction for SODIUM/POTASSIUM-transporting ATPase subunit… · a predicted model of the same protein · chain A against A, TM-score 0.98

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