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USP21 in complex with a ubiquitin-based, USP21-specific inhibitor

Analyse USP21 in complex with a ubiquitin-based, USP21-specific inhibitor in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
3MTN
Type
protein
Length
784 residues
Chains
4
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Ubiquitin carboxyl-terminal hydrolase 21; Ubiquitin variant UBV.21.4
EC
3.1.2.15
UniProt
Q9UK80, P62988
Ligands
ZN, CL
Pockets
5 · best druggability 0.78

Structure

x-ray diffraction · 3 distinct chains · 32% helix, 29% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
AUbiquitin carboxyl-terminal hydrolase 21 (EC 3.1.2.15)protein31633% helix, 29% strandQ9UK80
B, DUbiquitin variant UBV.21.4protein7723% helix, 32% strandP62988
CUbiquitin carboxyl-terminal hydrolase 21 (EC 3.1.2.15)protein31432% helix, 28% strandQ9UK80

Ligands and binding sites

  • ZN · Zinc ion · metal · 2 copies · chains A, C
  • CL · Chloride ion · ion · 4 copies · chains A, B, C, D
  • GOL · Glycerol · additive · 2 copies · chains A, B, C, D

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

Pockets

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

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
17420.780.8283GOL
28280.760.8071GOL
3940.510.8319empty
41100.510.8217empty
5570.330.7714empty

Interfaces

5 interfaces between chains.

  • A–B · 1858 Ų buried · 30 hydrogen bonds · protein-protein
  • C–D · 1842 Ų buried · 31 hydrogen bonds · protein-protein
  • B–C · 382 Ų buried · 4 hydrogen bonds · protein-protein
  • B–D · 207 Ų buried · 3 hydrogen bonds · protein-protein
  • A–C · 53 Ų buried · 0 hydrogen bonds · protein-protein

Compared structures

  • 3MTN · Usp21 in complex with a ubiquitin-based, USP21-specific inhibitor · the same entry in another collection · chain A against A, TM-score 1.00
  • Q9UK80 · AlphaFold monomer V2.0 prediction for ubiquitin carboxyl-terminal hydrolase 21 (Q9UK80) · a predicted model of the same protein · chain C against A, TM-score 0.99

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