2ZJD

Crystal Structure of LC3-p62 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.56 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis for Sorting Mechanism of p62 in Selective Autophagy

Ichimura, Y.Kumanomidou, T.Sou, Y.-S.Mizushima, T.Ezaki, J.Ueno, T.Kominami, E.Yamane, T.Tanaka, K.Komatsu, M.

(2008) J.Biol.Chem. 283: 22847-22857

  • DOI: 10.1074/jbc.M802182200

  • PubMed Abstract: 
  • Impairment of autophagic degradation of the ubiquitin- and LC3-binding protein "p62" leads to the formation of cytoplasmic inclusion bodies. However, little is known about the sorting mechanism of p62 to autophagic degradation. Here we identified a m ...

    Impairment of autophagic degradation of the ubiquitin- and LC3-binding protein "p62" leads to the formation of cytoplasmic inclusion bodies. However, little is known about the sorting mechanism of p62 to autophagic degradation. Here we identified a motif of murine p62 consisting of 11 amino acids (Ser334-Ser344) containing conserved acidic and hydrophobic residues across species, as an LC3 recognition sequence (LRS). The crystal structure of the LC3-LRS complex at 1.56 angstroms resolution revealed interaction of Trp340 and Leu343 of p62 with different hydrophobic pockets on the ubiquitin fold of LC3. In vivo analyses demonstrated that p62 mutants lacking LC3 binding ability accumulated without entrapping into autophagosomes in the cytoplasm and subsequently formed ubiquitin-positive inclusion bodies as in autophagy-deficient cells. These results demonstrate that the intracellular level of p62 is tightly regulated by autophagy through the direct interaction of LC3 with p62 and reveal that selective turnover of p62 via autophagy controls inclusion body formation.


    Organizational Affiliation

    Department of Biochemistry, Juntendo University School of Medicine, Tokyo 113-8421.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Microtubule-associated proteins 1A/1B light chain 3B precursor
A, C
130Homo sapiensGene Names: MAP1LC3B (MAP1ALC3)
Find proteins for Q9GZQ8 (Homo sapiens)
Go to Gene View: MAP1LC3B
Go to UniProtKB:  Q9GZQ8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
undecameric peptide from Sequestosome-1
B, D
11Mus musculusGene Names: Sqstm1 (A170, STAP)
Find proteins for Q64337 (Mus musculus)
Go to UniProtKB:  Q64337
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.56 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.201 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 45.559α = 90.00
b = 39.592β = 93.30
c = 78.011γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
MOLREPphasing
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-06-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance