- EMDB-10502: Cryo-EM structure of p62-PB1 filament (L-type) -
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Basic information
Entry
Database: EMDB / ID: EMD-10502
Title
Cryo-EM structure of p62-PB1 filament (L-type)
Map data
Globally sharpened map
Sample
Complex: p62-PB1 domain filament (L-type)
Protein or peptide: Sequestosome-1
Keywords
Autophagy / CYTOSOLIC PROTEIN
Function / homology
Function and homology information
brown fat cell proliferation / protein localization to perinuclear region of cytoplasm / regulation of Ras protein signal transduction / protein targeting to vacuole involved in autophagy / Lewy body / response to mitochondrial depolarisation / aggrephagy / amphisome / negative regulation of toll-like receptor 4 signaling pathway / autophagy of mitochondrion ...brown fat cell proliferation / protein localization to perinuclear region of cytoplasm / regulation of Ras protein signal transduction / protein targeting to vacuole involved in autophagy / Lewy body / response to mitochondrial depolarisation / aggrephagy / amphisome / negative regulation of toll-like receptor 4 signaling pathway / autophagy of mitochondrion / pexophagy / regulation of protein complex stability / endosome organization / non-membrane-bounded organelle assembly / molecular sequestering activity / ubiquitin-modified protein reader activity / phagophore assembly site / regulation of mitochondrion organization / aggresome / regulation of canonical NF-kappaB signal transduction / Nuclear events mediated by NFE2L2 / negative regulation of ferroptosis / autolysosome / endosomal transport / intracellular non-membrane-bounded organelle / temperature homeostasis / immune system process / K63-linked polyubiquitin modification-dependent protein binding / mitophagy / autophagosome / positive regulation of autophagy / signaling adaptor activity / energy homeostasis / inclusion body / sperm midpiece / negative regulation of protein ubiquitination / protein sequestering activity / ionotropic glutamate receptor binding / p75NTR recruits signalling complexes / PINK1-PRKN Mediated Mitophagy / Pexophagy / sarcomere / positive regulation of protein localization to plasma membrane / NF-kB is activated and signals survival / NRIF signals cell death from the nucleus / SH2 domain binding / molecular condensate scaffold activity / ubiquitin binding / positive regulation of long-term synaptic potentiation / response to ischemia / macroautophagy / protein kinase C binding / P-body / protein catabolic process / PML body / receptor tyrosine kinase binding / autophagy / Interleukin-1 signaling / protein import into nucleus / KEAP1-NFE2L2 pathway / protein localization / Signaling by ALK fusions and activated point mutants / late endosome / signaling receptor activity / Neddylation / protein-macromolecule adaptor activity / ubiquitin-dependent protein catabolic process / transcription by RNA polymerase II / cell differentiation / intracellular signal transduction / positive regulation of protein phosphorylation / positive regulation of apoptotic process / intracellular membrane-bounded organelle / ubiquitin protein ligase binding / protein-containing complex binding / protein kinase binding / apoptotic process / enzyme binding / negative regulation of transcription by RNA polymerase II / endoplasmic reticulum / positive regulation of transcription by RNA polymerase II / mitochondrion / zinc ion binding / extracellular exosome / nucleoplasm / identical protein binding / cytoplasm / cytosol Similarity search - Function
Journal: Nat Commun / Year: 2020 Title: Structural basis of p62/SQSTM1 helical filaments and their role in cellular cargo uptake. Authors: Arjen J Jakobi / Stefan T Huber / Simon A Mortensen / Sebastian W Schultz / Anthimi Palara / Tanja Kuhm / Birendra Kumar Shrestha / Trond Lamark / Wim J H Hagen / Matthias Wilmanns / Terje ...Authors: Arjen J Jakobi / Stefan T Huber / Simon A Mortensen / Sebastian W Schultz / Anthimi Palara / Tanja Kuhm / Birendra Kumar Shrestha / Trond Lamark / Wim J H Hagen / Matthias Wilmanns / Terje Johansen / Andreas Brech / Carsten Sachse / Abstract: p62/SQSTM1 is an autophagy receptor and signaling adaptor with an N-terminal PB1 domain that forms the scaffold of phase-separated p62 bodies in the cell. The molecular determinants that govern PB1 ...p62/SQSTM1 is an autophagy receptor and signaling adaptor with an N-terminal PB1 domain that forms the scaffold of phase-separated p62 bodies in the cell. The molecular determinants that govern PB1 domain filament formation in vitro remain to be determined and the role of p62 filaments inside the cell is currently unclear. We here determine four high-resolution cryo-EM structures of different human and Arabidopsis PB1 domain assemblies and observed a filamentous ultrastructure of p62/SQSTM1 bodies using correlative cellular EM. We show that oligomerization or polymerization, driven by a double arginine finger in the PB1 domain, is a general requirement for lysosomal targeting of p62. Furthermore, the filamentous assembly state of p62 is required for autophagosomal processing of the p62-specific cargo KEAP1. Our results show that using such mechanisms, p62 filaments can be critical for cargo uptake in autophagy and are an integral part of phase-separated p62 bodies.
History
Deposition
Nov 18, 2019
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Header (metadata) release
Jan 29, 2020
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Map release
Feb 12, 2020
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Update
May 22, 2024
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Current status
May 22, 2024
Processing site: PDBe / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
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