Crystal structure of p62 ZZ domain in complex with free arginine

Experimental Data Snapshot

  • Resolution: 1.41 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.136 
  • R-Value Observed: 0.139 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


ZZ-dependent regulation of p62/SQSTM1 in autophagy.

Zhang, Y.Mun, S.R.Linares, J.F.Ahn, J.Towers, C.G.Ji, C.H.Fitzwalter, B.E.Holden, M.R.Mi, W.Shi, X.Moscat, J.Thorburn, A.Diaz-Meco, M.T.Kwon, Y.T.Kutateladze, T.G.

(2018) Nat Commun 9: 4373-4373

  • DOI: https://doi.org/10.1038/s41467-018-06878-8
  • Primary Citation of Related Structures:  
    6MIU, 6MJ7

  • PubMed Abstract: 

    Autophagic receptor p62 is a critical mediator of cell detoxification, stress response, and metabolic programs and is commonly deregulated in human diseases. The diverse functions of p62 arise from its ability to interact with a large set of ligands, such as arginylated (Nt-R) substrates. Here, we describe the structural mechanism for selective recognition of Nt-R by the ZZ domain of p62 (p62 ZZ ). We show that binding of p62 ZZ to Nt-R substrates stimulates p62 aggregation and macroautophagy and is required for autophagic targeting of p62. p62 is essential for mTORC1 activation in response to arginine, but it is not a direct sensor of free arginine in the mTORC1 pathway. We identified a regulatory linker (RL) region in p62 that binds p62 ZZ in vitro and may modulate p62 function. Our findings shed new light on the mechanistic and functional significance of the major cytosolic adaptor protein p62 in two fundamental signaling pathways.

  • Organizational Affiliation

    Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, 80045, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sequestosome-155Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q13501 (Homo sapiens)
Explore Q13501 
Go to UniProtKB:  Q13501
PHAROS:  Q13501
GTEx:  ENSG00000161011 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13501
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.41 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.136 
  • R-Value Observed: 0.139 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.971α = 90
b = 32.269β = 122.16
c = 34.941γ = 90
Software Package:
Software NamePurpose
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-10-31
    Type: Initial release
  • Version 1.1: 2018-11-07
    Changes: Data collection, Database references
  • Version 1.2: 2024-03-13
    Changes: Data collection, Database references