4MJS

crystal structure of a PB1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.238 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and biochemical insights into the homotypic PB1-PB1 complex between PKC zeta and p62

Ren, J.Wang, J.Wang, Z.X.Wu, J.W.

(2014) Sci China Life Sci 57: 69-80

  • DOI: 10.1007/s11427-013-4592-z

  • PubMed Abstract: 
  • The atypical PKC isoforms (ζ and ı) play essential roles in regulating various cellular processes. Both the hetero-interaction between PKCζ and p62 through their N-terminal PB1 domains and the homo-oligomerization of p62 via its PB1 domain are critic ...

    The atypical PKC isoforms (ζ and ı) play essential roles in regulating various cellular processes. Both the hetero-interaction between PKCζ and p62 through their N-terminal PB1 domains and the homo-oligomerization of p62 via its PB1 domain are critical for the activation of NF-κB signaling; however, the molecular mechanisms concerning the formation and regulation of these homotypic complexes remain unclear. Here we determined the crystal structure of PKCζ-PB1 in complex with a monomeric p62-PB1 mutant, where the massive electrostatic interactions between the acidic OPCA motif of PKCζ-PB1 and the basic surface of p62-PB1, as well as additional hydrogen bonds, ensure the formation of a stable and specific complex. The PKCζ-p62 interaction is interfered with the modification of a specific Cys of PKCζ by the antiarthritis drug aurothiomalate, though all four cysteine residues in the PKCζ-PB1 domain can be modified in in vitro assay. In addition, detailed structural and biochemical analyses demonstrate that the PB1 domains of aPKCs belong to the type I group, which can depolymerize the high-molecular-weight p62 aggregates into homo-oligomers of lower order. These data together unravel the molecular mechanisms of the homo-or hetero-interactions between p62 and PKCζ and provide the basis for designing inhibitors of NF-κB signaling.


    Organizational Affiliation

    MOE Key Laboratory of Protein Science and Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein kinase C zeta type
A, C, E, G, I, K, M, O, Q, S, U, W
91Rattus norvegicusMutation(s): 0 
Gene Names: Prkcz (Pkcz)
EC: 2.7.11.13
Find proteins for P09217 (Rattus norvegicus)
Go to UniProtKB:  P09217
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Sequestosome-1
B, D, F, H, J, L, N, P, R, T, V, X
104Homo sapiensMutation(s): 2 
Gene Names: SQSTM1 (ORCA, OSIL)
Find proteins for Q13501 (Homo sapiens)
Go to Gene View: SQSTM1
Go to UniProtKB:  Q13501
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
H, M, O, X
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.238 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 85.715α = 90.00
b = 135.681β = 90.00
c = 259.559γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
PHENIXrefinement
HKL-2000data collection
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-08-27
    Type: Initial release
  • Version 1.1: 2014-10-29
    Type: Database references