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Structure of ectonucleotide pyrophosphatase-phosphodiesterase-1 (NPP1)

Analyse Structure of ectonucleotide pyrophosphatase-phosphodiesterase-1 (NPP1) in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
4B56
Type
protein
Length
1,553 residues
Chains
2
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Ectonucleotide PYROPHOSPHATASE/PHOSPHODIESTERASE family member 1
EC
3.1.4.1, 3.6.1.9
UniProt
P06802
Ligands
NAG, MAN, BMA, ZN, CA, PO4
Pockets
20 · best druggability 0.70

Structure

x-ray diffraction · 2 distinct chains · 29% helix, 20% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
AEctonucleotide PYROPHOSPHATASE/PHOSPHODIESTERASE family member 1 (EC 3.1.4.1, 3.6.1.9)protein81629% helix, 19% strandP06802
BEctonucleotide PYROPHOSPHATASE/PHOSPHODIESTERASE family member 1 (EC 3.1.4.1, 3.6.1.9)protein73729% helix, 21% strandP06802

Ligands and binding sites

  • NAG · 2-acetamido-2-deoxy-beta-D-glucopyranose · sugar · 12 copies · chains A, B
  • MAN · alpha-D-mannopyranose · sugar · 4 copies
  • BMA · beta-D-mannopyranose · sugar · 3 copies
  • ZN · Zinc ion · metal · 4 copies · chains A, B
  • CA · Calcium ion · metal · 2 copies · chains A, B
  • PO4 · Phosphate ion · ion · 2 copies · chains A, B

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

Pockets

20 pockets found on a 1 Å grid, 11 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
18110.700.7666empty
23950.670.8051PO4
34400.660.7874empty
43690.630.7846PO4
52880.620.7925empty

Interfaces

1 interface between chains.

  • A–B · 1150 Ų buried · 16 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 24 disulfide, 8 glycan (disulfide, N-glycosylation).

Compared structures

  • 4B56 · Structure of ectonucleotide pyrophosphatase-phosphodiesterase-1 (NPP1) · the same entry in another collection · chain A against A, TM-score 1.00
  • P06802 · AlphaFold monomer V2.0 prediction for ectonucleotide PYROPHOSPHATASE/PHOSPHODIESTERASE… · a predicted model of the same protein · chain B against A, TM-score 0.99

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