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Crystal structure of the RPN8-RPN11 mpn domain heterodimer, crystal form ib

Analyse Crystal structure of the RPN8-RPN11 mpn domain heterodimer, crystal form ib in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
4OCM
Type
protein
Length
941 residues
Chains
6
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
26S proteasome regulatory subunit RPN8; 26S proteasome regulatory subunit RPN11; NB1
UniProt
Q08723, P43588
Ligands
ZN, K
Pockets
13 · best druggability 0.83

Structure

x-ray diffraction · 5 distinct chains · 29% helix, 35% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A26S proteasome regulatory subunit RPN8protein16429% helix, 32% strandQ08723
B26S proteasome regulatory subunit RPN11protein17738% helix, 31% strandP43588
C, FNB1protein1257% helix, 51% strand—
D26S proteasome regulatory subunit RPN8protein16630% helix, 37% strandQ08723
E26S proteasome regulatory subunit RPN11protein18434% helix, 28% strandP43588

Ligands and binding sites

  • ZN · Zinc ion · metal · 2 copies · chains B, E
  • K · Potassium ion · metal · chains D

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

Pockets

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

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
12440.830.9535empty
22610.810.9341empty
31400.510.8032empty
42480.470.7340empty
51190.440.7722empty

Interfaces

7 interfaces between chains.

  • A–B · 1992 Ų buried · 9 hydrogen bonds · protein-protein
  • D–E · 1962 Ų buried · 14 hydrogen bonds · protein-protein
  • B–C · 672 Ų buried · 12 hydrogen bonds · protein-protein
  • E–F · 651 Ų buried · 11 hydrogen bonds · protein-protein
  • B–E · 613 Ų buried · 4 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 2 disulfide (disulfide).

Compared structures

  • 4OCM · Crystal Structure of the Rpn8-Rpn11 MPN domain heterodimer, crystal form Ib · the same entry in another collection · chain F against F, TM-score 1.00
  • Q08723 · AlphaFold monomer V2.0 prediction for 26S proteasome regulatory subunit RPN8 (Q08723) · a predicted model of the same protein · chain D against A, TM-score 0.97
  • P43588 · AlphaFold monomer V2.0 prediction for ubiquitin carboxyl-terminal hydrolase RPN11 (P43588) · a predicted model of the same protein · chain B against A, TM-score 0.88

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