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Crystal structure of AD37 fiber knob in complex with trivalent sialic acid inhibitor ME0386

Analyse Crystal structure of AD37 fiber knob in complex with trivalent sialic acid… in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
4K6U
Type
protein
Length
554 residues
Chains
3
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Fiber protein
UniProt
Q64823
Ligands
1P4, SIA, ZN
Pockets
1 · best druggability 0.70

Structure

x-ray diffraction · 3 distinct chains · 4% helix, 44% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
AFiber proteinprotein1843% helix, 42% strandQ64823
BFiber proteinprotein1873% helix, 45% strandQ64823
CFiber proteinprotein1835% helix, 44% strandQ64823

Ligands and binding sites

  • 1P4 · 3,3',3''-[nitrilotris(methanediyl-1H-1,2,3-triazole-4,1-diyl)]tripropan-1-ol · ligand
  • SIA · N-acetyl-alpha-neuraminic acid · sugar · 3 copies · chains A, B, C
  • ZN · Zinc ion · metal · 3 copies · chains A, B, C
  • ACT · Acetate ion · additive · chains C

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

Pockets

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

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
13380.700.8342empty

Interfaces

3 interfaces between chains.

  • A–B · 1056 Ų buried · 22 hydrogen bonds · protein-protein
  • A–C · 1036 Ų buried · 22 hydrogen bonds · protein-protein
  • B–C · 1023 Ų buried · 18 hydrogen bonds · protein-protein

Compared structures

  • 4K6U · Crystal structure of Ad37 fiber knob in complex with trivalent sialic acid inhibitor… · the same entry in another collection · chain A against A, TM-score 1.00

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